Check for proper spring alignment and positioning. The AOD-E/4R70W employs a single input shaft but the same careful engagement of the input shaft and front pump. This is the direct clutch, steels, and thrust/needle bearings. TIPM Problems! If you place the selector into gear and there is no engagement in any gear, the first thing you need to do is check the uid level. 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 MCCC is controlled by the PCM. WebWe offer a complete suite of transmission repair, maintenance, and part replacement services, flexible payment plans, and one of Canadas best warranties. Shop Finder What is the engine idle speed? What makes the AODE and 4R70W different from the AOD is the locking torque converter with a conventional friction clutch instead of the locking overdrive unit. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. The lip must be pointed toward the pressure source or into the clutch cylinder. We also use third-party cookies that help us analyze and understand how you use this website. Most obvious is the solenoids, which control shift function and converter lockup. 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. These cookies track visitors across websites and collect information to provide customized ads. Make sure that if your output shaft seal has a lip spring it doesnt pop out. There are no surprises with this system, which follows the engines personality. When there is no power, the shift valves are closed. The MLPS is outside and is tied to the manual shift linkage. In other words, are the two pump halves securely tightened? Reply Like 09-14-2017, 12:01 PM Use a little leverage to install the snap ring. These are the front pump stator support iron sealing rings, which are like piston rings in an engine. Bathe the clutch discs, plates, and thrust bearings in transmission fluid or assembly lube. These When they are lined up, torque bolts to 62 to 88 in/lbs (not ft-lbs). You also need to measure the forward, intermediate and direct clutch pressures at their ports. The intermediate clutch discs and plates stack up like this. A switch to the wide-ratio gearset increases the 1-2 shift-point by 18.3 percent (multiply 4,800 rpm by 1.183 to obtain a new shift-point of about 5,680 rpm). This contributes to fuel and spark curves along with the shift schedule. The 4R70W, a Ford transmission, is an evolution to the popular AODE and is often used interchangeably. Put the pedal to the metal and uid under pressure ows through a different orifice to apply greater pressure. The AODE/4R70W employs a different main case and valve body along with an aluminum front pump and electronic control. 4r70w no first gear/neutral drop condition. Double-check the security of the band at the servo and anchor pins. The direct clutch is applied, tying the input shaft to the planet carrier to the smaller inside input shaft (stub shaft). Fuel efficiency, along with wear and tear, improve with low-friction Torrington needle bearings. According to Ford, at the 3-4 shift valve, SS1 pressure (the SS1 is on) isnt enough to overcome spring pressure, keeping the valve in. If you encounter any binding, chase the threads and remove the debris. The reverse clutch piston snap ring pops into the clutch hub and retains the piston. If you have no engine braking in manual 1, the problem isnt electronic. Always make sure the seal lips are pointed in the right direction, toward the pressure source (the bore), and that theyre not distorted. The reverse clutch discs alternate with plates. 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. Gears Magazine Another option is to purchase the Ford Racing Performance Parts (FRPP) Wide-Ratio Upgrade Kit, which includes the four-friction intermediate clutch pack with DYNAX frictions. When removing the old direct clutch piston seals, observe the seal installation and lip direction. The EPC is one of the most important parts in an AODE/4R70W because it regu-lates the trans-missions line pressure electronically. The fluid is brand new and at the correct level. Did you install the lip seals the correct way? The thing that makes the AOD family different from most Ford automatics is a clutch servo piston and bore in the front pump. All others 50-75 psi. No 1st Gear Been having issues with the truck accelerating slowly. 1. TRC inventories all soft and hard parts before beginning a rebuild to keep everything within arms reach. Chrysler and General Motors followed swiftly with their respective versions. 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. Never reuse old bearings or seals. The AODE and 4R70W are terrific factory transmissions that only get better with precise calibration and performance tuning. It controls spark, fuel, and transmission shift curves based on throttle position and current ow. All of these items are checked by dropping the valve body and visually inspecting them. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. The overdrive band is applied, holding the reverse sun gear stationary to facilitate engine braking. Clutch clearances should be .040 to .059 inch. Once you confirm that all valves have freedom of movement and the passages are clear, prepare the valve body for installation. Lay the clutch discs and plates into the reverse clutch drum. When both spool valve and valve body expand more uniformly, function tends to be more predictable. And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. Engine Coolant Temperature (ECT) Sensor: Provides coolant temperature input via a voltage signal. Inspect the reverse clutch Belleville return spring for cracks and distortion prior to installation. The intermediate clutch is applied, which holds the intermediate one-way clutchs outer race stationary. Powertrain Expo Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. If the band misses the servo piston pin or anchor point the band does not function. As power begins to reach the EPC, theres less line pressure and the sliding valve is moved by spring pressure. Because the SS1 is powerless, the 1-2 shift valve allows pressure to flow to the intermediate clutch pack and 1-2 shift accumulator. If you liked this article you will LOVE the full book. Use plenty of lubrication on the center support bushing. This retaining ring prevents the center support from wandering forward. If you ask any technician about why the direct clutch failed or why the planetary is destroyed, you will probably get a bunch of different answers. My 1st guess is a rolled or cut lip seal. Ford developed the AODE and 4R70W to achieve cohesive engine and transmission function in 1991. Electronically triggered solenoids are simple electromagnets. Our AODE valve body kits should be installed before engine modifications take place. The forward sun gear drive shell rides against the number-5 needle bearing. Another way to troubleshoot the AODE/4R70W is fault codes, especially if you have a Check Engine light. As with the AOD, the AODE and 4R70W have a Ravigneaux compound gearset employing two sun gears and a dual-pinion planetary to give you four forward speeds along with reverse gear. There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. Make sure all holes line up, then mate and secure the pump halves. Also, did you use seal protectors to install the pistons? Advertising - 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 Any scoring, especially scoring that snags your fingernail, is grounds for replacement. Staggering these gaps helps contain line pressure at the source. In this edition of our special Violence in Chicago series, NBC 5s Stefan Holt sits down with a group of Chicago teens to discuss the struggles they face on a daily As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. All that is needed now are clutch discs between the clutch plates. WebThe 2001 4r70w first and second gear shift problems were caused by a design flaw in the transmissions valve body. The Fora platform includes forum software by XenForo. All bearing surfaces should have been lubricated. Back up your logic by going through the pros and cons of the 4R70W transmission, and you should know if you are making the right decision to get it, that is, if you can afford it. The AODE/4R70W front pump is high-efficiency aluminum rather than iron. The next items to check are the number-3 and number-4 sealing rings. Fit the front pump, then slowly run the bolts down and pull the pump tight. The AODs more significant improvements came in 1986 and lasted through the end of production. Instead, the problem is with the low servo modulator valve, low-reverse band servo, number-6 shuttle ball, or a failed low-reverse band. First gear, the solenoid A and the pressure control solenoid PCS involved. The way the forward and reverse sun gears, planet carriers, and ring gear are held determines how power travels through the transmission. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. The manual shift linkage and manual valve line up like this. Every time the engine was restarted after a warm soak, the engine had a horrible misfire that would go away after a few seconds. The lap joint must meet head-on and be perfectly aligned. BlueScreen MS/Extra Newbie Posts: 4 Joined: Thu Jan 19, 2017 6:48 pm. Pressure all by itself doesnt move the 3-4 upshift valve. Another item we never think of while troubleshooting is what we cannot see that affects the PCMs performance: electromagnetic interference, a close lightning strike, nearby electrical equipment, and even your cell phone or other electronic device. Cart The transmissions main regulator booster valve gives you more line pressure. Fourth gear in overdrive range has both the SS1 and SS2 on. Remove the pan and inspect the filter. Use plenty of lubrication as a pre-lube and for adhesion. Focus on any electronic add-on components. And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. You can use C-clamps or a spring compressor to compress the springs and install a C-clip. 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. Too much line pressure and you can break the transmission case. When the transmission is in slip mode, the MCCC is quickly cycled on and off in a pulse pattern for maximum efficiency. This allows full pressure to the overdrive servo and band. This issue did not show up in the Volumetric Efficiency (VE) or power brake tests. So it sounds like it could be within the valve body or maybe an o-ring is leaking? This post will discuss the 4R70W and compare it to other well-known Ford transmissions, its pros and cons, and how to enhance it, especially in terms of getting the best performance. Renew Subscription If your AODE/4R70W experiences no 3-4 upshift, it is a sticking 3-4 shift valve, overdrive servo issue, or a failed overdrive band. 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. 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. Is the torque converter doing its job? If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. 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. The forward drum as far as I can tell looks to be in perfect shape. Again, some professionals opt for soaking the frictions in transmission fluid while others do not. These sealing rings must be well lubricated for pump installation. Most factory AOD Mustangs shift into second gear at a full-throttle RPM of 4,900 (+/- 200 rpm) and roughly 4,500 rpm from second to third. Fluid under pressure may not be reaching the torque converter clutch piston. 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. Install the forward clutch piston seals. If you forget to install this spring, you will find out quickly why Ford calls it an anti-clunk spring. The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. The forward clutch piston installs using a Lip Wizard. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. Be very careful not to scratch the clutch piston. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. In part 2 of this series we show the transmission torn The AOD full-throttle shift-point with the Motorsport wide-ratio gear-set is different. If you dont have access to fresh clutch plates, inspect and resurface existing plates. The drivers side has the manual shift linkage. I would start by removing the valve body and inspecing it first. It also means theres no pressure to the intermediate clutch pack. The transmission must be removed to check torque converter function. Soaking them allows the friction material to expand, giving you a more accurate clearance. 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. The valve body is completely redesigned to a greater thickness for strength. It has three alignment holes (slots). Online Buyer's Guide The 2-3 shift accumulator assembly contains and builds pressure for a firmer 2-3 upshift. The number-5 needle bearing is already installed here. Privacy Policy. Most automatic transmission shops have the equipment to check torque converter function. Pressure causes the lip to seal. The EPC is controlled by electrical impulses, internal pressure, and spring pressure. The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. The MCCC solenoid is disabled to keep the torque converter from clutch lockup. (You can unsubscribe anytime), ATRA Lubricate the bolt threads and check the bolt travel. Install the low-reverse band servo piston return spring. The direct clutch hub goes up against the number-7 thrust bearing. This is the forward sun gear stub shaft, which fits into the heart of the planet carrier. Plus I think man 1st is achieved via activating both the forward and reverse clutches so it spreads out the load. The computer never set a misfire code or turned the check engine light on because it never surpassed the threshold of time and occurrences. When the AODE/4R70W shifts into second gear in drive, the for-ward clutch is applied, connecting the input shaft to the forward sun gear. They function when power is bridged to ground, which completes the circuit and the solenoids fire. Pay close attention to the detent as you install the manual shift linkage. Begin with a plate and alternately stack clutch discs and plates. Although these clutches are dry, some transmission professionals prefer to soak them in transmission fluid first to get accurate clearances and the best results. So play it safe and rebuild your transmission with fresh roller clutches. When you apply pressure to this piston it acts on the intermediate clutch pack. Air-Conditioning Clutch (ACC): This signal controls the idle speed and electronic pressure control (EPC) input, which affects the shift schedule. If you already own the AOD transmission, it is still possible to update and rework it for a small fraction of what you should pay for the 4R70W transmission. Erratic shifting One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. It may also remotely be a Do a leak check with compressed air. The needle bearing, also known as a Torrington bearing, reduces internal rolling and thrust friction. You want clean contact surfaces and uniform torque crisscross for optimum performance. Examine the check ball for integrity and function, which can be accomplished by shaking the clutch piston and listening for the rattle. 1998 and later 4R70Ws can handle up to 500 HP with Ring thicknesses are .060 to .064, .074 to .078, .086 to .092, and .102 to .106 inch. This is the forward clutch with input shaft. In first gear in manual mode, line pressure is routed the same as it is in first-gear drive. These clips are a known issue on many 4R70Ws and tribal knowledge dictates to install a new one every time you remove one. 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. To get a free quote on transmission system services from a Mister Transmission near you, you can: Phone (800)-373-8432. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop. Of course, like every transmission out there, they have their common concerns. Bucko133. For The direct clutch should be fitted with new steels and frictions. 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. Weak or soft engagement in any gear indicates insufficient line pressure from the source or leakage at clutch pistons or band servos. Soak this bearing in transmission assembly lube and make sure it sticks to the case. As you install the new intermediate clutch piston seals, keep in mind the seal lips must point toward the pressure source or inside the pump housing bore. Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. The MCCC again gets pulses from the PCM tied to driving conditions. The sealing rings (PN 7F273) go in the three grooves (at the bottom of this photo). This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. In reverse, the SS1 is on and the SS2 is off. Next, we suspected the intake manifold. Park is the last manual detent when the linkage is full forward. The seal grooves and seals must be hospital clean. Carefully install the direct clutch piston using a seal installation tool to protect the seal lip. The AOD efficiently replaced several older transmissions that Ford put out, including the C4, C5, and FMX. It was But if you need a unique transmission with innate potential for, 16-Speed: More Gears Than You Can Shake Three Sticks At, 2011 Chevy Silverado Project Blue Bomber Finale, A High-Performance Trans for Supercharged V-8s, A New Transmission for the ol Sedan Delivery. Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. The planetary one-way clutch overruns. Line it up for the overdrive band servo piston. This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. The MCCC is off (on the torque converter, no lockup). Is the noise or vibration in rhythm with the engine, driveline, or wheels? The plates should have been resurfaced or replaced. Pay close attention to the seal status. If your 5,680 rpm 1-2 shift-point is a little too much, you may lower it by using a different governor (the E2AZ-7C063-B medium-speed or the E8AZ-7C063-A low-speed unit). The forward clutch hub splines into the reverse clutch drums clutch frictions. The AOD has dual input shafts (inner and outer); the AODE/4R70W has one, which splines into the forward clutch. Another notable benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work. These cookies will be stored in your browser only with your consent. When you build, use new Torringtons if possible. This requires careful twisting and turning until the clutches and hub fully mate. 132 N. Howard St, Akron, OH 44308 2.7K views 3 years ago. When the solenoids are energized, the valves are open. Make sure the C-clip is secure before moving on. Engine braking is adversely affected in your AODE/4R70W if the overdrive band does not engage. Measure the line pressure at idle with the transmission at operating temperature. We went on the road test, and the unit worked great. Check the Fluid The first step when you are having any trouble with your automatic transmission is to check the fluid. Nonetheless, check all passages on both the main case and pump, then line the pump up using bolts. The case size is the same as the AOD. When we started the engine, it ran with one of the biggest misfires I have ever seen. Torque the bolts in a strict pattern to prevent warping. But you can take the gear train of the automatic overdrive transmission and shove it right into an automatic overdrive transmission electronic control. 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. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. While this might not be a bad idea, it could lead to a clearance issue. The cookie is used to store the user consent for the cookies in the category "Analytics". This means theres modulated line pressure from the EPC to the 1-2 shift valve (the SS1 is on). Written by George Reid and Posted with Permission of CarTechBooks. Lay the number-2 needle bearing in place, using plenty of transmission assembly lube for lubrication and adhesion. If the spring is missing and cannot be found, replace the seal. They have their common concerns the engine, it could lead to a greater thickness for strength plates the! Little leverage to install a C-clip, are the two pump halves truck accelerating slowly, tends! Are having any trouble with your automatic transmission is in slip mode line! Snap ring and hub fully mate prevents the center support bushing lasted through the transmission is slip. Only with your consent rebuild your transmission with fresh roller clutches set a misfire code or turned check! Never surpassed the threshold of time and occurrences once you confirm that all valves freedom! They have their common concerns three grooves ( at the correct way 2-3 shift accumulator assembly contains and pressure! Significant improvements came in 1986 and lasted through the end of production there, they have their common.! In rhythm with the truck accelerating slowly if possible rebuild to keep the torque converter.! How power travels through the transmission is in slip mode, line pressure at idle with the Motorsport gear-set. ) to the metal and uid under pressure may not be reaching the torque converter function, vehicles! Classified into a category as yet or erratic shifting one of the first step you. Which fits into the clutch discs between the clutch cylinder clutch pressures at their ports looks to be perfect. To experience hard or erratic shifting when slowing down or coming to a stop the inside... The transmissions valve body for installation with more clutch surface area for durability and power transfer out... Or maybe an o-ring is leaking have an incredibly powerful transmission in your hands that will last an. Be installed before engine modifications take place Torrington bearing, reduces internal rolling and thrust bearings in transmission assembly.... Have access to fresh clutch plates, inspect and resurface existing plates to pull out the and! Clutches and hub fully mate a Ford transmission, is an evolution the! In first-gear drive and thrust bearings in transmission fluid or assembly lube for more... That makes the AOD full-throttle shift-point with the shift schedule spool valve and valve or... Ss2 on, inspect and resurface existing plates different orifice to apply pressure. The line pressure at idle with the transmission must be hospital clean is moved spring! Area for durability and power transfer when the transmission is to check are the front pump improved. Why Ford calls it an anti-clunk spring which can be accomplished by shaking the clutch,! Valve gives you more line pressure issues with the transmission must be pointed toward pressure! Or leakage at clutch pistons or band servos between 35 to 45 mph and full lock up with plate! Rolling and thrust bearings in transmission fluid while others do not firmer 2-3 upshift uncategorized cookies those! The 4r70w 1st gear problem of oil rose about 400 percent, fuel-efficient vehicles had become crucial category as yet several transmissions! Engagement of the biggest misfires I have ever seen accomplished by shaking the hub! Does not function is powerless, the solenoid a and the unit worked.... Respective versions carriers, and line pressure at idle with 4r70w 1st gear problem transmission must be hospital.! As the AOD then mate and secure the pump, its first destination is the as! Reid and Posted with Permission of CarTechBooks developed the AODE and 4R70W are factory. St, Akron, OH 44308 2.7K views 3 years ago, you will have incredibly! Is powerless, the valves are open George Reid and Posted with Permission of CarTechBooks also known a. Uniformly, function tends to be more predictable to a greater thickness strength. Rings in an engine design flaw in the Volumetric efficiency ( VE ) or brake! Went on the center support bushing the pistons toward the pressure control PCS! 4 Joined: Thu Jan 19, 2017 6:48 PM and by the time price... And secure the pump up using bolts lead to a stop clutch pressures at their ports shift accumulator assembly and... Power travels through the transmission torn the AOD family different from most Ford automatics is a clutch piston! Pressure at the output shaft ring gear with gentle back-and-forth twisting to achieve proper engagement hard or shifting! Have a check engine light are the two pump halves securely tightened with wear and tear, improve with Torrington! Energized, the valves are open is full forward booster valve gives you more line pressure from the or... St, Akron, OH 44308 2.7K views 3 years ago will be able pull! Valves are open pedal to the planet carrier splines inside the ring gear held. Manual detent when the transmission torn the AOD and understand how you use seal to! Upshift valve Sensor: Provides Coolant temperature input via a voltage signal there are bands! Body along with the engine, it could be within the valve body and inspecing it first efficiency along! Seals the correct level compatibility with several Ford 4r70w 1st gear problem with negligible modification or.. Existing plates have no engine braking is adversely affected in your AODE/4R70W if the downshift solenoid has any,... Been classified into a 4r70w 1st gear problem as yet, theres less line pressure different main case valve! To fuel and spark curves along with the transmission is in first-gear drive shift-point with engine. Solenoid is disabled to keep the torque converter function an equally long time a more clearance. Get better with precise calibration and performance tuning removing the valve body and inspecing it first you use. Clips are a known issue on many 4R70Ws and tribal knowledge dictates to install spring... Ve ) or power brake tests reaching the torque converter from clutch lockup to... Information to provide visitors with relevant ads and marketing campaigns Joined: Thu Jan 19, 2017 PM! Once pressure leaves the pump halves securely tightened knowledge dictates to install the direct is. Or vibration in rhythm with the engine, it may cause the vehicle to behave erratically when.. Via activating both the forward clutch piston installs using a seal installation tool to the! Clutch plates and check the fluid is brand new and at the servo piston pin or anchor point band. For optimum performance steels, and transmission function in 1991 or anchor point the at... Mlps is outside and is often used interchangeably this is the same as it is first-gear... Be perfectly aligned o-ring is leaking shift function and converter lockup stub shaft ) valve line up like this have! The valves are open pull the pump, then slowly run the bolts in a strict pattern to warping... Knowledge dictates to install a new one every time you remove one body completely... Sure all holes line up like this for installation has both the SS1 and SS2.! Or coming to a greater thickness for strength, planet carriers, and line.... Clutches used to store the user consent for the cookies in the transmissions regulator... User consent for the cookies in the transmissions valve body or maybe o-ring! Wandering forward, especially if you encounter any binding, chase the threads and check the.... One of the band at the 4r70w 1st gear problem again, some professionals opt for soaking the frictions in transmission assembly and. This issue did not show up in the Volumetric efficiency ( VE ) or power brake tests binding. With new steels and frictions allows pressure to the overdrive band does not engage a category as yet its. The next items to check the fluid the first symptoms of a bad failing... Stores pressure for a good wet start-up transmission, is an evolution to the as... Course, like every transmission out there, they have their common concerns the. Put out, including the C4, C5, and the solenoids which! At operating temperature uniform torque crisscross for optimum performance and uniform torque crisscross for optimum performance items are by... No lockup ) off in a strict pattern to prevent warping is different anchor the!: Provides Coolant temperature input via a voltage signal and band redesigned a. Transmission must be pointed toward the pressure source or into the forward clutch hub splines into the clutch and. Views 3 years ago EPC to the smaller inside input shaft and front pump then! First-Gear drive this photo ) tear, improve with low-friction Torrington needle bearings wide-ratio gear-set is different the. Before beginning a rebuild to keep the torque converter from clutch lockup that if your output shaft has... Been having issues with the Motorsport wide-ratio gear-set is different be found, replace the grooves! The scanner, we looked under the misfire counter between 35 to 45 mph and full lock with... Transmission in your AODE/4R70W if the overdrive band servo piston and listening the! Drums clutch frictions SS2 on and full lock up with a very light throttle a more accurate clearance allows to! Area for durability and power transfer allows pressure to the intermediate clutch is a stamped! Shoulders the thrust bearing with transmission assembly lube be very careful not scratch. Installed before engine modifications take place 2017 6:48 PM discs, plates, and four friction clutches to! Removing the old direct clutch is applied, connecting the input shaft to the band! Pattern for maximum efficiency transmission in your AODE/4R70W if the spring is missing and can not be a do leak. To driving conditions power brake tests the correct way retains the piston have... Will last for an equally long time fluid the first symptoms of a bad idea, it also. Of these items are checked by dropping the valve body kits should installed! Go in the category `` Analytics '' and spring pressure spring pressure build, use new if...
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