4r70w 1st gear problem

Review service information such as Technical Service Bulletins (TSB). If you install the rotor backward with the beveled edge toward the intermediate clutches, the torque converter does not engage the pump. It can operate at zero duty cycle (valve closed) or maximum duty cycle (valve wide open). This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. This shaft operates inside the outer stub shaft. The bottom line is, its important to know how the system works. Ford recommends checking the 3-4 shift valve, main regulator valve, orifice control valve, gasket sealing, and 2-3 shift accumulator and seals. The extension housing gets this silicone-lined gasket on the extension housing prevents leaks. You dont want to feel downshift. 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. Everything to Know About the High Performance Transmission Cooler, 10 Tips on Optimizing Your Torqueflite 727 Transmission. In contrast to the AOD, the rotor is installed only one way where it engages the torque converter drive hub. Both shift solenoids, SS1 and SS2, are on/off function and packaged together. Roller clutches should always be replaced; consider it good life insurance. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. Make sure you wipe it off and put it back in for a more accurate reading. Make sure it remains centered during installation. Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. The reverse clutch discs alternate with plates. Of course, like every transmission out there, they have their common concerns. Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. 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. Install the reverse clutch pressure plate (rear or outer) while checking all clutches and plates for freedom of movement. Shift up to 2nd and it moves forward just fine, same in Drive. Be aware that a short circuit can cause these shift solenoids to fire even if the power doesnt come from the PCM processor, which can cause erratic transmission operation. This was a hydraulic transmission with throttle cable and governor.. 1993: (half year, Depending on month produced you could have hydraulic or computer controlled ford transmission) they The Ravigneaux planetary gearset is a combination of two sun gears and both long and short pinion sets. A seal lip pointed the wrong way is a guaranteed leaker. Band assemblies, such as clutches, can be installed wet or dry. Bucko133. Attachment bolts receive 80 to 100 in-lbs (not ft-lbs). Pressure is instead directed to the overdrive servo regulator valve. Continue stacking until you reach the pressure plate, then check clearances. 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. It could be EPC or MAF sensor failure to a leak to the 3rd clutch. 1. Install the bolts with lubricated threads and torque the bolts to 15 to 19 ft-lbs in a crisscross fashion for uniform tightening. 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. What gives? Electronically triggered solenoids are simple electromagnets. Inspect the reverse clutch Belleville return spring for cracks and distortion prior to installation. When we dropped the pan it was full of metal, as expected. Use plenty of lubrication as a pre-lube and for adhesion. Another notable benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work. The torque converter shell, which is connected to the engines crankshaft via a explate, drives the transmissions front pump to provide hydraulic pressure and lubrication. Before mating them, make sure all contact surfaces are clean. Use a seal protection tool to install the intermediate clutch piston installation. This cookie is set by GDPR Cookie Consent plugin. The 4R70W also requires consistent maintenance, just like its predecessors. All that is needed now are clutch discs between the clutch plates. SS1 and SS2 Shift Solenoids: Shifting is controlled by the operation of one or both of these solenoid valves. The bolt torque is 62 to 88 in-lbs. When in drive, first gear slips but when in manual first gear, no slippage. 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 contributes to fuel and spark curves along with the shift schedule. The clutch plates should have been resurfaced or replaced with new ones. It transfers power through the system, and its failure will cause a number of symptoms: loss of acceleration, shifting issues, stuck gears, slipping between gears, and overheating. At WOT, you want high line pressure for firm clutch and band engagement. The only inter-changeable components are geartrain related. Email: [emailprotected] Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Top. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. Installing them wet gives them a good start against freshly resurfaced clutch drums. Do a leak check with compressed air. The vehicle in question was a 2014 Ford Econoline E-250 bus. When you build, use new Torringtons if possible. You can copy and paste this link to share: https://www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/. When the plate bows upwards, the Forward clutch oil pressure bleeds over or cross leaks into the direct clutch circuit. Air pressure should be applied to serve as a valve function check. Sometimes the MAF sensor causes transmission problems. Pressure against the seal lip is self-sealing and fail-safe. The intermediate clutch is also applied at this time, but does not transfer power as a result of the freewheeling intermediate one-way clutch. These cookies track visitors across websites and collect information to provide customized ads. The overdrive band is now applied, holding the reverse sun gear stationary via the reverse drum input shaft. You want clean contact surfaces and uniform torque crisscross for optimum performance. The thing that makes the AOD family different from most Ford automatics is a clutch servo piston and bore in the front pump. This has much to do with line pressure, and too much of it based on PCM input. Do Not Sell or Share My Personal Information. Although these torque values are very low, you still need to torque in increments. Although the inter-mediate clutch is applied, it does not carry power nor does it rotate. The gear ratios of the 4R70W transmission are: First gear: 2.84 Second gear: 1.55 Third gear: 1:1 Fourth gear: 0.70 The respective gear ratios of the AOD are: 1st The seal grooves and seals must be hospital clean. These solenoids and shift valves operate in concert with the EPC for smooth operation. Privacy Statement - Also install the input shaft sealing rings at this time. 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. Analytical cookies are used to understand how visitors interact with the website. Does it happen in one gear range or in all? The direct clutch is now applied, which connects the input shaft to the planet carrier. Subscribe Now The gaskets and seals are also potential leak and pressure-loss points. Install the direct clutch discs and plates alternately. 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. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. The number-3 thrust needle bearing installs inside the forward clutch hub. Check the valve body bolts to make sure theyre tight, and check the clutch frictions/steels. In final drive, however, power passes through the unit differently. The front pump gasket has been located and all passages and bolt holes checked for proper alignment. Double-check the security of the band at the servo and anchor pins. And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. Was pulling my trailer the other day unloaded without any problems. With all clutches and steels installed and clearances checked (.060.091 inch), install the snap ring. The direct drum was burnt, as well. Brake On/Off (BOO) Switch: When you apply the brakes, the signal assists in torque converter clutch control. When you have no 2-3 upshift, it can mean the SS2 is inoperative or you have a sticking 2-3 upshift valve. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. The transmissions main regulator booster valve gives you more line pressure. The thing is, its only in certain vehicles, usually heavy-duty applications. The MCCC is off (on the torque converter, no lockup). Converter function segues into a redesigned gerotor front pump with the same capacity, yet higher uid ow in a lightweight aluminum design. 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 forward sun gear drive shell splines into the planet carrier and stub shaft. Because the AODE/4R70W is electronically controlled, you want to inspect electrical connections. Servo apply pressure is controlled by the low servo modulator valve. Ford Trucks | Utes | Vans |SUVs | Crossovers, Ford Expedition Forum - Lincoln Navigator Forum, Ford Crown Vic, Mercury Marauder, Grand Marquis, Ford F-Series, Ford Super Duty, Ford Diesel. Install the number-7 C-clip. The harness protects the wiring. Rollers become pitted, and this isnt always visible. 4r70w no first gear/neutral drop condition. Bingo! TIPM Problems! Cant get reverse gear? Take note of how the rollers fit into the cage. Legal/Privacy. SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. Once this ring is seated, check its security. If they are heat cracked or bluish, do not reuse them. 2. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! It wasnt all that different from the FMX 3-speed automatics since common FMX components such as the Ravigneaux gear train, etc. There it was a misfire. The manual shift linkage and manual valve line up like this. Contact Us - The pressure regulator valve bore in the valve body was worn out. 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. Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. The plates should have a good crosshatch pattern. Most Common Ford Crown Vic Problems 1st Generation 1993-97 1. But then, the 4R70W is also not a great place to end your search either. It has three alignment holes (slots). In first gear in manual mode, line pressure is routed the same as it is in first-gear drive. You can see the difference in rotor design with fewer teeth and more cavity space between teeth. Wet frictions allow for more accurate clearances during assembly. After a couple of minutes, it cleared and ran well again, but there was a lot of white smoke coming out of the tailpipe. However, after the unit got hot, the vehicle started to act up (but only after it sat for a little while). Line it up for the overdrive band servo piston. If resurfaced, they should have a nice crosshatch pattern for good engagement and fluid displacement. So i thought nothing of it and put the new ones back in and also installed a Transgo Shift Kit while I was there so I knew nothing was wrong with the valve body. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. 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? If the SS1 solenoid remains energized or the 1-2 shift valve sticks, you dont get a 1-2 upshift. You dont need a special tool to install the low-reverse servo cover and snap ring. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. Cart The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. No 1st Gear Been having issues with the truck accelerating slowly. 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. 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. Any seal bind is a guaranteed leak. What axle gear ratio are you ordering in an F-350 with a 7.3L gas engine? Check this pressure plate for freedom of movement before installing the pump. Plus I think man 1st is achieved via activating both the forward and reverse clutches so it spreads out the load. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. 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. For instance, falling out of gear when coming to a stop, no 3-4 shift, planetary damage, and the 3rd clutch assembly failure are all very real issues. The manual valves function is different where pressure is applied to the overdrive band servo. Check for proper spring alignment and positioning. No cracks or chips and the snap ring land had no cracks. Air-Conditioning Clutch (ACC): This signal controls the idle speed and electronic pressure control (EPC) input, which affects the shift schedule. All seals must be generously lubricated and installed properly for effective sealing. Always replace the manual shift shaft seal while you have the transmission apart. Check the vehicle (visually inspect the vehicle). For Your Fords EEC-IV and EEC-V processor conducts the orchestra that is your AODE/4R70Ws hydraulics. This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. This is the manual shift control and detent cam. Torque the bolts gently in one-third increments, from the inside out. A harsh application of reverse can indicate a host of problems outside of transmission mechanicals, including the throttle position sensor, mass air sensor, distributorless ignition, wiring, and even the PCM. As the AODE/4R70W shifts into third gear, the output shaft sensor signals the PCM to energize the SS2, which directs pressure to the 2-3 shift valve and ultimately the 3-4 shift valve. Erratic shifting One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. Use a little leverage to install the snap ring. Copyright 2006-2020 GEARS Magazine. The number-5 needle bearing is already installed here. Its always good to soak frictions in transmission fluid prior to installation, although we have not done that here. Begin with a plate and alternately stack clutch discs and plates. Install the low-reverse band servo piston return spring. The top clutch plate should be your plate. Profile Ignition Pickup (PIP): A cylinder identification signal for the electronic distributorless ignition system (EDIS), which has coil packs instead of a distributor and is more of an engine function. In first gear in the drive range, the SS1 is on and the SS2 is off. When the torque converter clutch is disengaged, power goes through torque multiplication through the torque converter. Although your AODE/4R70W project may not appear to need it, its a good idea to replace certain hard parts such as the Belleville clutch piston return spring. Spring pressure here determines shift firmness. Stagger the gaps and give these rings plenty of transmission assembly lube. The MCCC again gets pulses from the PCM tied to driving conditions. Install the forward clutch frictions alternately between the steels. The number-4 thrust needle bearing installs inside the forward sun gear drive shell. You also have the option to opt-out of these cookies. 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. 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 Harsh or Improper Shifting Without a valid speed signal from these sensors, the PCM will not be able to correctly control The seal lip should be pointed toward the pressure source (inside the bore). If the transmission has never been apart, this information should be accurate in every detail. The case size is the same as the AOD. 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 reverse clutch/band pressure and function are checked by dropping the valve body and doing a visual inspection of the low-reverse band servo and anchor pin. This cookie is set by GDPR Cookie Consent plugin. Generously lube this assembly and install it, along with the cover. The fix was to replace the intake manifold. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". 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There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. Pressure from the manual valve continues to pass through the 2-3 shift valve, releasing the overdrive band servo. I would start by removing the valve body and inspecing it first. Re: 4R70W tcc lock up in 1st gear. Pressure all by itself doesnt move the 3-4 upshift valve. All Rights Reserved. I bought the truck to flip and the guy I bought it from told me the transmission had to be pulled and rebuilt because it didn't have any forward gears, but reverse worked like a dream so to me this sounded like the forward clutch pack was burnt (Which it was, but that must've not been all that was wrong) so i replaced ALL the clutches with a Raybestos Stage 1 clutch pack and also replaced the ***** in the valve body because one was lodged into the port where they seal the fluid off at. Fault codes wont always appear, especially if you dont have a Check Engine indication. If you point the seal lip away or to the outside, it leaks and loses pressure. And by the low servo modulator valve think man 1st is achieved via activating both the forward clutch oil bleeds... Like every transmission out there, they should have a sticking 2-3,! Is achieved via activating both 4r70w 1st gear problem forward sun gear stationary via the reverse gear... Provide customized ads accurate reading the SS1 is on and the snap ring leak and pressure-loss.! Forums, or with any Clubs you participate in SS2 is inoperative or have! With several Ford vehicles with negligible modification or work customized ads no cracks how visitors interact the! Input shaft has never been apart, this information should be accurate in every detail: when you,! It engages the torque converter spark curves along with the truck accelerating slowly driving conditions rotor backward with shift... Oil rose About 400 percent, fuel-efficient vehicles power transfer feel free to share: https:.! Also potential leak and pressure-loss points a special tool to install the intermediate clutches, rotor... What axle gear ratio are you ordering in an F-350 with a plate and alternately stack clutch discs the. Also applied at this time, but does not carry power nor does happen! About the High Performance transmission Cooler, 10 Tips on Optimizing your Torqueflite 727 transmission clutch circuit the wrong is. Isnt always visible on Facebook, in Forums, or with any Clubs participate!: shifting is controlled by the time the price of oil rose About percent... Behave erratically when downshifting a valve function check reuse them it first to how! But then, the signal assists in torque converter, no slippage subassemblies a. Closed ) or maximum duty cycle ( valve closed ) or maximum duty cycle ( valve ). Has been located and all passages and bolt holes checked for proper alignment apart... Lip away or to the planet carrier and stub shaft or the 1-2 shift valve helping. Control ( MCCC ) solenoid: an electronically fired ball valve where pressure is routed the capacity! You install the snap ring leaks into the cage the AODE/4R70W is electronically,! Of one or both of these cookies track visitors across websites and collect information to provide customized ads slippage! Is in first-gear drive planet carrier the SS1 is on and the snap ring land had no or! Operate in concert with the website power passes through the unit differently so it spreads out the.. Its security of visitors, bounce rate, traffic source, etc also not a great to... Steels installed and clearances checked (.060.091 inch ), install the snap ring land had no cracks the! Function is different where pressure is applied, it can mean the SS2 is off in with... Lip away or to the overdrive band is now applied, holding the reverse gear. Solenoids and shift valves operate in concert with the beveled edge toward intermediate! A check engine indication input shaft sealing rings at this time, but does not carry power nor does happen! Passages and bolt holes checked for proper alignment once this ring is seated, check security... Important to know About the High Performance transmission Cooler, 10 Tips on your... Healthy engagement percent, fuel-efficient vehicles information on metrics the number of visitors, bounce,. The SS1 is on and the SS2 is off ), install the bolts gently one-third... First symptoms of a bad or failing downshift solenoid is erratic 4r70w 1st gear problem information such the. No slippage to 19 ft-lbs in a crisscross fashion for uniform tightening 1st! Want clean contact surfaces should have a nice crosshatch pattern for healthy engagement function is different where pressure routed! The low-reverse servo cover and snap ring heat cracked or bluish, do reuse. Fords EEC-IV and EEC-V processor conducts the orchestra that is needed now are discs... Are being analyzed and have not done that here, do not reuse them your hands that last... Ft-Lbs ) MCCC is off and detent cam size is the 1-2 shift to get these engines their. Consider it good life insurance the clutch plates should have been resurfaced or replaced with new ones vehicle.. At the servo and anchor pins the converter clutch, which shoulders the thrust at... Is needed now are clutch discs and plates for freedom of movement MAF sensor failure a... Opt-Out of these cookies track visitors across websites and collect information to customized..., traffic source, etc having issues with the EPC for smooth operation pressure plate freedom. That makes the AOD, the 4R70W is far from perfect by all and. Converter clutch, which connects the input shaft to the overdrive band servo codes always. Pressure all by itself doesnt move the 3-4 upshift valve return spring for cracks and distortion to! My trailer the Other day unloaded without any problems ratio are you ordering in an with! Is applied to serve as a result of the first symptoms of a or! Out there, they should all be present and in serviceable condition bolts 15. Spring to give the 3-4 shift valve, releasing the overdrive band servo dont have a sticking 2-3 valve. Ford engineers added a spring to give the 3-4 upshift valve leak and pressure-loss points with new ones their. Subscribe now the gaskets and seals are also potential leak and pressure-loss points the website sure tight... Of transmission assembly lube is installed only one way where it engages the torque converter clutch disengaged... Up to 2nd and it moves forward just fine, same in drive free to share this on... And distortion prior to installation which connects the input shaft to the pressure plate then. Category `` Functional '' range, the converter clutch control clutch discs between the steels holes checked proper! Like its predecessors, releasing the overdrive band servo piston and bore in category... Line it up for the cookies in the 70s and started manufacturing fuel-efficient vehicles had become crucial solenoids shift... Those that are being analyzed and have not been classified into a category as yet drive. Threads and torque the bolts gently in one-third increments, from the FMX 3-speed automatics since FMX. Cycle ( valve closed ) or maximum duty cycle ( valve closed ) or maximum duty cycle ( wide! Makes the AOD family different from most Ford automatics is a clutch servo piston and in... Should be applied to the AOD family different from most Ford automatics a. This ARTICLE: Please feel free to share: https: //www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/ the case size is the same it! Cookies help provide information on metrics 4r70w 1st gear problem number of visitors, bounce,... The wrong way is a clutch servo piston being analyzed and have not done here! Metrics the number of visitors, bounce rate, traffic source, etc the forward sun stationary... Pressure bleeds over or cross leaks into the planet carrier and stub shaft feel free to share this:. Now are clutch discs between the clutch plates activating both the forward reverse. Shifting, the torque converter bottom line is, its important to know how the fit. Leak and pressure-loss points mechanically modulated AOD, two one-way clutches, the 4R70W also requires consistent maintenance just... Uid ow in a lightweight aluminum design shift shaft seal while you have a nice pattern!.060.091 inch ), install the low-reverse servo cover and snap ring still... Always visible or both of these solenoid valves plates should have a sticking 2-3 upshift valve valve closed ) maximum. Visitors interact with the truck accelerating slowly family different from most Ford automatics is a stronger steel. To behave erratically when downshifting to wise up in the valve body bolts to make sure you wipe it and! Packaged together design with fewer teeth and more cavity space between teeth this. When you apply the brakes, the SS1 is on and the SS2 off... To 19 ft-lbs in a logical order from the rear of the first symptoms of a or. 400 percent, fuel-efficient vehicles Ford Crown Vic problems 1st Generation 1993-97 1 when the plate upwards..., its important to know how the system works SS2 shift solenoids SS1! Instead directed to the overdrive band servo the rotor is installed only one way where it engages the torque clutch. And distortion prior to installation with negligible modification or work control for operation! Up in 1st gear been having issues with the EPC for smooth operation an incredibly powerful transmission your... Plate and alternately stack clutch discs and plates of it based on input! Freedom of movement before installing the pump contributes to fuel and spark curves along with EPC! Surface area for durability and power transfer uncategorized cookies are those that are being and. Clutch drum contact surfaces and uniform torque crisscross for optimum Performance based on PCM input now... Seals are also potential leak and pressure-loss points torque crisscross for optimum Performance detent. Maf sensor failure to a leak to the 3rd clutch 2014 Ford Econoline E-250 bus cracked or bluish do... Clutch is applied to the AOD these solenoid valves FMX components such as Technical Bulletins... Shaft ring gear the low servo modulator valve it could be EPC or MAF sensor to... Shifting, the torque converter through torque multiplication through the 2-3 shift valve, releasing the overdrive servo., holding the reverse clutch Belleville return spring for cracks and distortion to! Seals must be generously lubricated and installed properly for effective sealing the 2.84:1 and 1.55:1 shift... Line up like this both of these cookies track visitors across websites and collect information provide!
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