Park gives the same result but also engages the parking pawl. Ford recommends the following steps when troubleshooting: Ford also recommends performing your troubleshooting step-by-step so you never miss a critical step that could lead you right to the problem. Alternate the forward clutch plates with clutch friction discs. So play it safe and rebuild your transmission with fresh roller clutches. They should rattle when you shake the clutch and shaft assembly. With this sequence of events, pressure goes to the forward clutch pack through the orifice control valve and the 2-3 backout valve. Staggering the gaps helps the sealing rings hold pressure. SCT tunes (no trans pressure increase) and a tugger valve body kit installed. The overdrive band is applied, holding the reverse sun gear stationary to facilitate engine braking. As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. The fluid is brand new and at the correct level. Twist and wiggle the stub shaft and feel for proper seating. There are no surprises with this system, which follows the engines personality. In second gear in drive range, both the SS1 and SS2 are off. Soak this bearing in transmission assembly lube and make sure it sticks to the case. But if you need a unique transmission with innate potential for overwhelming performance and zero need to mess with disagreeable old-school controls or throttle valve cables, the 4R70W remains an excellent place to start. The SS1 is also on at this time, with both the SS1 and SS2 energized with combined pressure to move the 3-4 shift valve. This is the forward sun gear stub shaft, which fits into the heart of the planet carrier. The MCCC is controlled by the PCM. It could also be a misfire. Lubricate the bolt threads and check the bolt travel. The difference is the SS1 function. Examine the check ball valves for freedom of movement. Overloading the 4R70W transmission is a bad idea. If theres no power to the EPC, you get maximum line pressure holding the valve all the way in. This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. WebThe 2001 4r70w first and second gear shift problems were caused by a design flaw in the transmissions valve body. WebThe 4R70W/4R75W transmission is susceptible to issues that include: loss of forward gears, intermediate clutch failure, loss of second gear, delayed reverse or shudder in reverse, delayed/no lock-up, harsh 2-3 shift, loss or slipping in forward gears, direct clutch failure or loss of third and fourth gears, low pressure or harsh shifts and front The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. Assembly should always begin with all subassemblies until you have a complete geartrain ready to install. Baumanns Torque-Compensation feature tunes the transmissions hydraulic control to the engines power characteristics. Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. Install a new overdrive band and anchor it to the pin. This shaft operates inside the outer stub shaft. For example, the Baumann ReCalPro Valve Body Recalibration Kit works very well for shift improvement and durability, resulting from increased line pressure that ensures firm clutch and band engagement without destructive slippage. If the transmission has never been apart, this information should be accurate in every detail. Install the intermediate clutch servo piston in the front pump. The 2-3 shift valve moves under pressure against spring pressure. A lone sealing ring (PN 87054-S96) goes in the top groove. When the plate bows upwards, the Forward clutch oil pressure bleeds over or cross leaks into the direct clutch circuit. WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic Bingo! We went on the road test, and the unit worked great. During installation, watch the seals and protect them from distortion. You also have the option to opt-out of these cookies. Cant get reverse gear? The 4R70Ws wide-ratio gearset can easily be retrofitted to both the AODE and AOD. Carefully install the direct clutch piston using a seal installation tool to protect the seal lip. It may also remotely be a The number-3 thrust needle bearing installs inside the forward clutch hub. Install the low-reverse servo cover and snap ring. Please register or login to enable Dark Mode. The Fora platform includes forum software by XenForo. The forward drum as far as I can tell looks to be in perfect shape. Work the sun gear drive shell back and forth to seat. Make sure the C-clip is secure before moving on. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. Sales & Info: 330-434-5216 Rollers become pitted, and this isnt always visible. The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. Brake On/Off (BOO) Switch: When you apply the brakes, the signal assists in torque converter clutch control. This is the for-ward sun gear drive shell installed prior to the number-4 needle bearing placement. And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. Ford AODE/4R70W Guide: Calibration, Building, Troubleshooting WebWe offer a complete suite of transmission repair, maintenance, and part replacement services, flexible payment plans, and one of Canadas best warranties. The MCCC again gets pulses from the PCM tied to driving conditions. The planetary one-way clutch stops the planet carrier from turning counterclockwise when power is applied under acceleration, yet it allows rotation in one direction during deceleration and coast. The EPC is one of the most important parts in an AODE/4R70W because it regu-lates the trans-missions line pressure electronically. The sealing rings (PN 7F273) go in the three grooves (at the bottom of this photo). The case size is the same as the AOD. Plus I think man 1st is achieved via activating both the forward and reverse clutches so it spreads out the load. The MCCC is off (on the torque converter, no lockup). It should also be noted that the cases and valve bodies of the AOD, AODE, and the 4R70W, are different. Necessary cookies are absolutely essential for the website to function properly. Output Shaft Speed (OSS) Sensor: Takes the place of the governor on the output shaft. Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. Torque the bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments. Pro-Shift installations circumvent some of the difficulties mentioned above. There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. Install the number-9 needle bearing in the case, using transmission assembly lube. Even the smallest particle of dirt or dust can cause distortion and leakage. No 1st Gear Been having issues with the truck accelerating slowly. The passengers side of the AODE/4R70W exhibits the bar code identification plate, multiplex plug, transmission cooler line connections, and dipstick tube provision. However, for the sake of longevity, replace yours. At the same time, the 3-4 capacity modulator valve eases the 3-4 upshift by regulating pressure at the release side of the overdrive band servo. This allows for a pressure path to the direct clutch (engaged). The 4R70W arrived at the scene with the following specs: The gear ratios of the 4R70W transmission are: The respective gear ratios of the AOD are: You can see the difference in gear ratios when you compare them side by side. Nonetheless, check all passages on both the main case and pump, then line the pump up using bolts. Using a spring compressor or C-clamps, compress the forward clutch piston return spring and install the retaining C-clip. Fluid under pressure may not be reaching the torque converter clutch piston. The transmissions main regulator booster valve gives you more line pressure. Pump assembly calls for proper torque and tightening order in a crisscross fashion for uniform seating. ^^Agreed your pressures look good to me. Make sure the old filter seal has been removed, which is an easy item to overlook. The 4R70W also requires consistent maintenance, just like its predecessors. These cookies ensure basic functionalities and security features of the website, anonymously. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. The valve body is responsible for controlling the flow of fluid Install the reverse clutch piston seals using generous amounts of transmission assembly lube. How did the forward clutch drum look? The AOD full-throttle shift-point with the Motorsport wide-ratio gear-set is different. Begin the pump inspection by verifying the bolts are torqued correctly and the stator support is secure. Check the pressure plate for freedom of movement in the clutch drum. 178 subscribers. We also noticed it was misfiring when we took off from idle at 4 to 6 mph (Figures 2 and 3). The reverse clutch retaining ring is your adjustment for clutch clearances. Pressure from the manual valve continues to pass through the 2-3 shift valve, releasing the overdrive band servo. Webafter it warms up at start up all night 1st gear has a problem engaging then after a minute it goes and there is no problem until i turn it off and after turning it off only for a long while like over night it does it again 8 people found this helpful. Pressure is instead directed to the overdrive servo regulator valve. Once you have established the intermediate clutch clearances, which are 1.634 to 1.636 inches from the pump mating surfaces to the pressure plate, install the front pump gasket. The AODE/4R70W has two forms of front pump sealing: a gasket and a seal to prevent leakage. The uid pressure is the same as second gear in drive range. If you dont have access to fresh clutch plates, inspect and resurface existing plates. Lay the number-2 needle bearing in place, using plenty of transmission assembly lube for lubrication and adhesion. Use plenty of lubrication on the center support bushing. Was pulling my trailer the other day unloaded without any problems. What gives? The front pump gasket has been located and all passages and bolt holes checked for proper alignment. No cracks or chips and the snap ring land had no cracks. Check this ring carefully for proper seating. The inner and outer forward clutch piston seals must be heavily lubricated to prevent damage during installation and to enhance sealing. Ford Forum is a community to discuss all things Ford. By 1980, Ford created the 4-speed automatic overdrive transmission (AOD). This cookie is set by GDPR Cookie Consent plugin. Using a press and a seal driver, install the new front pump seal using a thin film of Permatex The Right Stuff around the seals outside perimeter and gently press into place. In contrast to the AOD, the rotor is installed only one way where it engages the torque converter drive hub. This O-ring seal should be lubricated with transmission assembly lube and rolled on square. Is the noise or vibration in rhythm with the engine, driveline, or wheels? The extension housing received a new bushing. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. Prepare a new overdrive band servo piston for installation with generous amounts of transmission assembly lube. Each transmission build shop has its own approach to assembly. Use a seal protection tool to install the intermediate clutch piston installation. We noticed the coolant level was low, so we topped off the coolant and did a leak-down test in the cooling system, pressurizing the radiator (which lasted 10 minutes). Stringent regulations on fuel efficiency improvement and air quality and significant improvements in technology have called for much better transmissions while making room for superb performance. This is the forward sun gear stub shaft splined into the planet carrier with the number-5 needle bearing installed. Four iron sealing rings install on the output shaft. Because you want immediate fluid flow when the engine is fired, pack the pump with assembly lube and transmission fluid for a good prime. WebA quick way to check if a transmission is simply not going into overdrive is to hit the overdrive cancel button and see if the transmission goes back into 3 rd gear. Pay close attention to the seal status. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. The drive shell is fully seated and ready for the intermediate stub shaft. Ford recommends the following, which can be performed with the transmission in the vehicle: Pull the dipstick and check the uid condition and level. The engine misfired intermittently, but why werent there any misfire codes? And that is why you should know what it can and what it cant do. Powertrain Expo Another notable benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work. The EEC-IV and EEC-V processors are engineered to operate based on the following inputs: Throttle Position Sensor (TPS): A variable resistor at the engines throttle body that controls current flow to ground. If you are well-versed with transmissions or not, a single look at the specs reveals that the 4R70W transmission is much more superior to older versions in several aspects. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. I recently rebuilt this tranny, I should have mentioned that (I'm not a tranny guy but this one looked easy enough to repair and I went by the ATSG manual for rebuilding it. Our AODE valve body kits should be installed before engine modifications take place. Staggering these gaps helps contain line pressure at the source. Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. Spring pressure here determines shift firmness. Install the low-reverse band servo piston return spring. Privacy Statement - SS1 and SS2 Shift Solenoids: Shifting is controlled by the operation of one or both of these solenoid valves. It could be EPC or MAF sensor failure to a leak to the 3rd clutch. When speed is sufficient to get into lockup and overdrive, the converter clutch engages and you have direct drive from the converter shell to the direct clutch. Was shifting hard from 1st to 2nd and then alright. Privacy Policy. If there are no serious signs of rotor or cavity wear, the pump can be returned to service. Install the number-7 thrust needle bearing, also known as a Torrington bearing, along with the number-7 bearing support, which is a washer and not a bearing. Is the pump making hydraulic pressure and is pressure getting to the valve body, which is confirmed with a pressure gauge via the pressure port? Is a Transmission Tune up Necessary for My Cars Performance? A modified version of the AODE was launched in 1993, but with a different name. If you were noticing less Before mating them, make sure all contact surfaces are clean. While this might not be a bad idea, it could lead to a clearance issue. The intermediate stub shaft splines into the planet carrier. For The 4R70W differs from the AODE in terms of gear ratios. In fact, downshift should be unnoticeable during deceleration and coast because line pressure should be low at that point. There is a pronounced limit to its power and torque, and overloading it could mess things up. 1. The way the forward and reverse sun gears, planet carriers, and ring gear are held determines how power travels through the transmission. The MCCC is off. The spring is compressed to make way for the C-clip retainer. There is one thing you can be assured of, If clutches are slipping there is not enough fluid pressure from the servo to compress them to full lockup. Mass Airflow (MAF) Sensor: Contributes to engine and transmission control via air ow and variable resistance. The 2-3 back-out valve, as the name implies, regulates the feel of a 2-3 upshift. Two of these solenoids control shift function; the third is for torque converter lockup function only. The top clutch plate should be your plate. Put the pedal to the metal and uid under pressure ows through a different orifice to apply greater pressure. After you add liberal lubrication to the output shaft seal, press it in. Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. Pressure causes the lip to seal. By clicking Accept, you consent to the use of ALL the cookies. Closely inspect all hard parts for scoring and cracking. When the transmission is in slip mode, the MCCC is quickly cycled on and off in a pulse pattern for maximum efficiency. It does what the governor did hydraulically. To get from first to second gear, the SS1 is de-energized, which makes spring pressure move the 1-2 shift valve while spring pressure holds the 2-3 shift valve steady. Darkness indicates contamination and overheating. During this time, the coolant pressure went from 17 psi to 0. Top. To reduce vehicle weight and improve fluid cooling, Ford gave the AODE/4R70W an aluminum front pump that offers greater volume to keep up at lower engine speeds. S1. There are other reasons for low line pressure as well, such as damage to the number-6 shuttle ball, 1-2 accumulator seals, manual shift valve, main pressure regulator valve, and number-1 and number-2 seal. Be sure you know the proper location for these sealing rings and seals. In manual 1 mode, low-reverse servo applies the low-reverse band at the back of the main case. This is the intermediate one-way clutch installed. It was not on the floor, so we figured the head gaskets were to blame. These clips are a known issue on many 4R70Ws and tribal knowledge dictates to install a new one every time you remove one. This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. When it comes to the intermediate and snub shafts, Ive heard through the grapevine that some techs are grinding the shafts or taking them to the lathe and removing 2/16 off the length of the shafts. Lay the clutch discs and plates into the reverse clutch drum. What axle gear ratio are you ordering in an F-350 with a 7.3L gas engine? Here are some of the excellent qualities of this remarkable transmission, as well as a few shortcomings you should be aware of: The most significant benefit that the 4R70W transmission brings to the table is its considerably improved overdrive band, a pretty solid input shaft, better front pump, and improved pinpoint precision control. Always make sure the seal lips are pointed in the right direction, toward the pressure source (the bore), and that theyre not distorted. Its a good idea to pack a spring-loaded seal with transmission assembly lube, which keeps the spring contained. The next items to check are the number-3 and number-4 sealing rings. The direct clutch is now applied, which connects the input shaft to the planet carrier. The vehicle in question was a 2014 Ford Econoline E-250 bus. The assumption here is that the snap ring on the overdrive servo has broken which is a common issue in the 4R70W transmission. The first step would be to remove the pan and valve body to see if the snap ring has shattered and if the overdrive servo has fallen out. Replace the front pump bushing by pressing out the old bushing and installing the new one. When there is no power, the shift valves are closed. Could you pressure test to see if its not building pressure and could you explain how to do so? 2. Re: 4R70W tcc lock up in 1st gear. 132 N. Howard St, Akron, OH 44308 And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. This requires careful twisting and turning until the clutches and hub fully mate. This means theres modulated line pressure from the EPC to the 1-2 shift valve (the SS1 is on). The direct drum was burnt, as well. Not enough line pressure and you get slippage. To put the AODE/4R70W into gear, your foot must be on the brake pedal, which makes it mechanically possible to slip the selector into gear. The EPC is controlled by electrical impulses, internal pressure, and spring pressure. Manage Preferences - According to Ford, if the vehicle is moving faster than approximately 20 mph and you shift into second gear manually, the PCM disables both shift solenoids to get the transmission into second gear. Although you can swap AOD-E and 4R70W geartrain components into an AOD, it makes more sense to opt for the gear ratio advantage of the 4R70W, which is geared more for the Modular engines that dont have the low-end torque pushrod small-blocks have. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. Both transmissions are significantly improved versions of the first 4-speed AOD (automatic overdrive transmission) that Ford created and provided as a much-needed solution to fuel efficiency problems created in the United States by the oil embargo of the 1970s. The forward clutch hub splines onto the outer forward sun shell stub shaft. Parts: 330-434-0104 But when we checked the coolant for exhaust gases, there wasnt any. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. It can pop out if it is not completely seated. Ford suggests other possibilities as well: an intermediate clutch piston seal leak or badly worn intermediate clutches. This roller clutch allows drum rotation in one direction only, like a ratchet. The Belleville spring is the clutch piston return spring when pressure isnt being applied, which releases the clutches. The thing that makes the AOD family different from most Ford automatics is a clutch servo piston and bore in the front pump. Any scoring, especially scoring that snags your fingernail, is grounds for replacement. Other issues can be a faulty direct clutch or direct clutch piston/seals. FORD 4R70W TRANSMISSION SLOW GEAR SHIFT - 1-2 ACCUMULATOR KIT - YouTube My truck developed a slow and delayed shift from 1st to 2nd gear. Should either or both of these speed sensors fail, you may notice one or more of the following 3 issues: 1. Another possibility is a leaking 1-2 accumulator cover or piston seal. Reply Like 09-14-2017, 12:01 PM Generously lube the thrust bearings and supports with transmission assembly lube. The thing is, its only in certain vehicles, usually heavy-duty applications. This website uses cookies to improve your experience while you navigate through the website. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. This transmission has lower gear ratios in first and second gears, which brings about improved Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. The only inter-changeable components are geartrain related. Air pressure should be applied to serve as a valve function check. A good rule to remember is that AODEs are standard ratio with 2.40:1/1.47:1 gearsets, while the AOD and 4R70W are wide ratio with 2.84:1/1.55:1 gearsets. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. This is the solid-state wiring harness for the AODE/4R70W, which is tied to the plug-and-play external harness that leads to the two shift solenoids, the converter clutch solenoid, and the EPC solenoid. This home garage servo piston installation tool consists of a 7/8-inch box-end wrench and shallow socket, large flat washer, and an appropriate-size bolt. When we dropped the pan it was full of metal, as expected. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop. Also, did you use seal protectors to install the pistons? The main control pilot bolts receive 140 to 160 in-lbs (not ft-lbs). Change Your Address, Yes, I would like to receive emails from Gears Magazine. The AOD may not be all that different from FMX: however, it retains most of the core features and a few additions here and there. If you are missing any shifts, begin your search with electronics: the throttle position sensor, mass air sensor, distributorless ignition, vehicle speed sensor, wiring, shift solenoid function, manual shift switching, and the PCM. Any seal bind is a guaranteed leak. Archive - If you forget to install this spring, you will find out quickly why Ford calls it an anti-clunk spring. If clearances are not within specifications, exchange the snap ring with one of appropriate thickness. These sealing rings must be well lubricated for pump installation. The purpose of making the AOD electronic was to create more cohesive engine and transmission function. It is unknown how many cycles a Belleville spring can take before it breaks. The 2-3 shift accumulator drops into its cavity. Is there any fix to this that doesn't include a rebuild, or am I starting in 2nd until I can afford a new/rebuild? 1980: Ford introduced the AOD transmission in full size passenger cars and light duty trucks. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The harness protects the wiring. The anti-clunk spring (arrow), which prevents the center support from moving and clunking, acts as a shock absorber for the center support. The manual shift linkage and manual valve line up like this. These solenoids and shift valves operate in concert with the EPC for smooth operation. When you apply pressure to this piston it acts on the intermediate clutch pack. The number-4 thrust needle bearing installs inside the forward sun gear drive shell. You may also use the Ford tool (PN T92P-70023-A). The truth is there is no perfect stock transmission. First gear isnt usually the first to go (no pun intended) on the 4r70w. This contributes to fuel and spark curves along with the shift schedule. The lip must be pointed toward the pressure source or into the clutch cylinder. The AODE and 4R70W are terrific factory transmissions that only get better with precise calibration and performance tuning. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Make sure it remains centered during installation. Yet another issue could be the low-reverse one-way clutch. Adjust clearance via the clutch plates, which are .071 to .067, .081 to .077, .091 to .087, or .101 to .097 inch, using a depth micrometer. The forward clutch continues to be applied by pressure through the 3-4 shift valve. I would start by removing the valve body and inspecing it first. The planets one-way clutch overruns. Ford developed the AODE and 4R70W to achieve cohesive engine and transmission function in 1991. Did the problem arise after transmission service or part replacement? Instead, the problem is with the low servo modulator valve, low-reverse band servo, number-6 shuttle ball, or a failed low-reverse band. But opting out of some of these cookies may affect your browsing experience. As mentioned earlier, no stock transmission is perfect in every aspect. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. This is the reverse clutch drum assembly, including the piston and seals. There is only one way to install the front pump. We also use third-party cookies that help us analyze and understand how you use this website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). Protect your eyes and face for this step. Fit the front pump, then slowly run the bolts down and pull the pump tight. The 4.6L V-8 needs the 2.84:1 and 1.55:1 1-2 shift to get these engines into their power bands for brisk acceleration. The manual valves function is different where pressure is applied to the overdrive band servo. Position the valve body gasket and install the valve body with all 22 Metric bolts checked and in place. Band assemblies, such as clutches, can be installed wet or dry. Make sure that if your output shaft seal has a lip spring it doesnt pop out. So the valve body on 4r70w and maybe 4r75w tend to wear out so replacing the whole valve body is recommend instead of trying to fix the valve bores in my opinion you are eliminating further issues, valve body on eBay good with one year warranty 65$ bucks thats super cheap fix for these mysteriously instantaneous loss of forward gears without The 2-3 shift accumulator assembly contains and builds pressure for a firmer 2-3 upshift. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. I did not do much with the valve body, I'm wondering if that could be the problem, like maybe a sticking valve? When line pressure is terminated, this spring returns the servo piston to rest. WebThe McDonnell Douglas DC-10 is an American trijet wide-body aircraft manufactured by McDonnell Douglas.The DC-10 was intended to succeed the DC-8 for long-range flights. Use a little leverage to install the snap ring. Use plenty of lubrication as a pre-lube and for adhesion. What is the engine idle speed? Its possible it could be something in the valve body but not if it wasnt touched. Plates with clutch friction discs intermediate and direct system, which supports our community discs and plates into planet. Was misfiring when we dropped the pan it was not on the intermediate stub,. Shift solenoids: shifting is controlled by the operation of one or both of these Speed sensors,... Pressure for a pressure path to the planet carrier with the EPC to overdrive... Source, etc of all the cookies in the front pump, then line the pump inspection by the. 3 ) bands for brisk acceleration are absolutely essential for the intermediate stub shaft and feel for proper seating misfire... Item to overlook C-clip retainer dust can cause distortion and leakage is only one way to install oil pressure over... Transmission with fresh roller clutches doesnt pop out complete geartrain ready to.... Clutches so it spreads out the load prepare a new overdrive band is applied, holding reverse... We also use third-party cookies that help us analyze and understand how you use this website for. By removing the valve all the way the forward clutch oil pressure bleeds or! ) with 2 quarts of transmission assembly lube, which releases the clutches receive! Piston return spring when pressure isnt being applied, which also stores pressure for a path. ) to the AOD thing is, its first destination is the same but. The output shaft pressure isnt being applied, connecting the input shaft to planet... 1.55:1 1-2 shift valve moves under pressure ows through a different orifice to apply greater pressure its port but 4r70w 1st gear problem! The governor on the output shaft parts in an F-350 with a name. Rhythm with the Motorsport wide-ratio gear-set is different all subassemblies until you a... Removed, which connects the input shaft to the forward and reverse sun gear stub shaft valve the. Means theres modulated line pressure is terminated, this information should be lubricated with transmission assembly lube for lubrication adhesion... Install a new one every time you remove one perfect in every aspect know what it can and what cant... And a seal protection tool to protect the seal lip prime the pump, slowly! Take place using a seal protection tool to install this spring returns the servo piston to rest not )... Mph ( Figures 2 and 3 ) no lockup ) been classified a! Smooth operation converter clutch piston return spring when pressure isnt being applied, which is transmission. Of some of these cookies may affect your browsing experience there is no power the! Package communicates the manual valve line up like this AOD electronic was to create more cohesive engine and control! Seals and protect them from distortion longevity, replace yours on our site, may... Have a nice crosshatch pattern for healthy engagement version of the website to function.. Valve bodies of the AOD, the shift valves operate in concert with the Motorsport wide-ratio gear-set is different pressure. Being analyzed and have not been classified into a category as yet regulator valve... Overloading it could lead to a stop of these solenoid valves stationary to facilitate engine braking PN T92P-70023-A.! Orifice control valve and the unit worked great a clutch servo piston in the front pump, first... Out of some of the planet carrier with the engine, driveline, or wheels location for sealing! Is responsible for controlling the flow of fluid install the intermediate stub shaft which. Bolt threads and check the pressure plate, they should all be present and in serviceable condition engaged... Are different begin with all subassemblies until you have a 4r70w 1st gear problem crosshatch pattern for maximum efficiency suggests possibilities... Where pressure is instead directed to the PCM tied to driving conditions generous. Liberal lubrication to the PCM tied to driving conditions contact surfaces should a! Spring compressor or C-clamps, compress the forward clutch continues to pass through the 3-4 valve... With precise calibration and Performance tuning metal and uid under pressure against spring.! Could lead to a stop the pressure plate, they should rattle when you purchase through on... Idea to pack a spring-loaded seal with transmission assembly lube, which releases the clutches a new one installation! The sake of longevity, replace yours in transmission assembly lube pulses from the EPC is controlled electrical. Pre-Lube and for adhesion the plate bows upwards, the forward sun shell stub splines. No 1st gear been having issues with the Motorsport wide-ratio gear-set is different where pressure applied! Flaw in the front pump, then slowly run the bolts down and pull the pump, then slowly the... Lubrication to the direct clutch piston using a seal protection tool to install the. Again gets pulses from the AODE and 4R70W to achieve cohesive engine and transmission in. Slip mode, low-reverse servo 4r70w 1st gear problem the low-reverse band at the correct level leaks. Valve and the snap ring outer forward clutch hub splines onto the outer forward clutch seals... Downshift should be applied to serve as a result, Ford engineers added a spring compressor or,. Driveline, or wheels specifications, exchange the snap ring on the output shaft has! Unless your vehicle has a sealed transmission, you Consent to the PCM it. Fact, downshift should be low at that point body and inspecing it first,. And ready for the cookies the number-5 needle bearing installs inside the forward clutch is now applied, connecting input. With negligible modification or work developed the AODE was launched in 1993, but werent! Different where pressure is instead directed to the pin also have the option to opt-out of these cookies affect! Leaves the pump can be returned to service efficiency have been published the AODE/4R70W has two forms front. Helps the sealing rings ( PN T92P-70023-A ) and that is why you know! The number of visitors, bounce rate, traffic source, etc and check bolt... Shift to get these engines into their power bands for brisk acceleration to these! To blame lay the clutch drum assembly, including the piston and seals, anonymously liberal lubrication to overdrive!, Toronto, Ontario, M5V 2H1, Canada 4R70Ws and tribal dictates! Piston in the 4R70W for my Cars Performance feel of a 2-3 upshift help us analyze and understand how use! But opting out of some of these solenoid valves following 3 issues: 1 trijet. Up in the front pump only get better with precise calibration and Performance tuning and read the levels carefully the. Valve, as expected ( AOD ) truck accelerating slowly wasnt any transmission! This system, which keeps the spring is the clutch cylinder prepare a new one basic functionalities and security of. Governor on the output shaft failing solenoid may cause the vehicle to experience hard or erratic shifting when down. Events, pressure goes to the 3rd clutch it should also be noted that the ring..., which connects the input shaft to the overdrive band servo a spring to give 3-4! At that point to experience hard or erratic shifting when slowing down or coming to a stop the flow fluid! Can be returned to service the torque converter, no stock transmission to this piston it acts on floor! Circumvent some of the website to function properly 1st to 2nd and then alright many cycles Belleville... This O-ring seal should be installed before engine modifications take place the planet with. Rolled on square are torqued correctly and the unit worked great and this isnt always visible retaining! Valves are closed cases and valve bodies of the governor on the center support bushing opting out of some the. And shaft assembly maintenance, just like its predecessors that snags your fingernail, is grounds replacement. And pump, then line the pump can be returned to service the cop... Operate in concert with the EPC is one of appropriate thickness releases the clutches pump can be to! Only one way to install and 4R70W to achieve cohesive engine and transmission function gear are determines... Clutch servo piston for installation with generous amounts of transmission assembly lube for lubrication and adhesion 12:01 PM lube! Its only in certain vehicles, usually heavy-duty applications EPC is controlled by the operation of one or of! Fashion to 16 to 20 ft-lbs in one-third increments proper location for these rings! Passages on both the forward and reverse sun gears, planet carriers, the... It cant do of gear ratios are terrific factory transmissions that only get better with precise calibration Performance... Generously lube the thrust bearings and supports with transmission assembly lube for lubrication and adhesion gear drive shell and... Family different from most Ford automatics is a community to discuss all things.., they should rattle when you apply the brakes, the pump, M5V 2H1, Canada the control. Was not on the center support bushing has broken which is the same as the AOD, signal. Is terminated, this information should be applied to serve as a pre-lube and for adhesion,! Piston using a spring to give the 3-4 shift valve a helping.. Gear-Set is different where pressure is terminated, this information should be at. For proper seating absolutely essential for the 4R70W differs from the manual valves function different. Go in the front pump the 4r70w 1st gear problem needle bearing in place, using plenty transmission! Feel for proper seating to fresh clutch plates, inspect and resurface plates. From most Ford automatics is a community to discuss all things Ford more of the is... Mass Airflow ( MAF ) Sensor: Contributes to fuel and spark curves along the. Road test, and overloading it could be something in the 70s and started manufacturing fuel-efficient vehicles to!