If theres no power, the transmission goes into second gear instead of first. Pressure is instead directed to the overdrive servo regulator valve. The TCI Automotive rebuild kit includes iron sealing rings and Teflon seals for improved sealing. Once this ring is seated, check its security. Copyright 2006-2020 GEARS Magazine. Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). JavaScript is disabled. Gears Magazine Sales & Info: 330-434-5216 Since these buses run 24/7 with mandatory services intervals every 50k miles, they overhauled this unit with all the bells and whistles. 1. 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. Could you pressure test to see if its not building pressure and could you explain how to do so? Transmission Control Module: Buyers Guide for Classic Cars. Did you install the lip seals the correct way? Email info@mistertransmission.com. The reverse clutch retaining ring is your adjustment for clutch clearances. The AODE/ 4R70W differs from the AOD in input. Measure the line pressure at idle with the transmission at operating temperature. Subscribe Now The SS1 stays on, keeping the transmission in first gear. If the SS2 isnt energized, there is a 1-2 upshift, but the transmission never gets out of second gear. The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. 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. The AODE/4R70W employs a different main case and valve body along with an aluminum front pump and electronic control. I did not do much with the valve body, I'm wondering if that could be the problem, like maybe a sticking valve? The torque converter is a locking unit with a pressure plate, servo, and clutch friction. 4r70w no first gear/neutral drop condition. Check the valve body bolts to make sure theyre tight, and check the clutch frictions/steels. The two direct clutch scarf-cut sealing rings must properly lap or they will not seal. Because you want immediate fluid flow when the engine is fired, pack the pump with assembly lube and transmission fluid for a good prime. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. AODE units through 1995 are standard ratio with 2.40:1/1.47:1 gearsets, except those installed behind the 4.6L single overhead camshaft (SOHC) and DOHC Modular V-8s, which are equipped with the 4R70W wide-ratio transmission. If the band misses the servo piston pin or anchor point the band does not function. These When we dropped the pan it was full of metal, as expected. The MLPS is outside and is tied to the manual shift linkage. Another notable benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. Install the forward clutch piston seals. Have you checked the fluid for proper level and burning The 4R70W transmission tends to slip on the 1st gen Ford Crown Vic. The seal lip should be pointed toward the pressure source (inside the bore). 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. Or it could be a number of sensors both internal and external. 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. 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. The seal grooves and seals must be hospital clean. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Ford recommends the following, which can be performed with the transmission in the vehicle: Pull the dipstick and check the uid condition and level. Everything to Know About the High Performance Transmission Cooler, 10 Tips on Optimizing Your Torqueflite 727 Transmission. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Once you have the converter seated it is Downshifts are harsh during deceleration if the engine speed is too high, because increased engine speed causes an increase in line pressure. All that is needed now are clutch discs between the clutch plates. 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 2-3 shift accumulator drops into its cavity. The intermediate clutch is also applied at this time, but does not transfer power as a result of the freewheeling intermediate one-way clutch. The converter clutch control solenoid is then controlled by the PCM. You can copy and paste this link to share: https://www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/. In final drive, however, power passes through the unit differently. All of these items are checked by dropping the valve body and visually inspecting them. Diagnose the problem (accurately diagnose). 1980: Ford introduced the AOD transmission in full size passenger cars and light duty trucks. If the uid and filter are clean, the pump and pressure relief are the next order of business. In 1996-98 Mustangs, the speedometer drive gear is part of the output shaft and is not replaceable. If you manage to get through gears 1, 2, and 3, a transmission that fails to make overdrive (fourth gear) is not an electrical issue. During deceleration or coast, you want low line pressure for a smooth upshift/downshift. Contact Us - Begin your troubleshooting with electronics, then mechanicals. 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. Plus I think man 1st is achieved via activating both the forward and reverse clutches so it spreads out the load. 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). 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 twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. 1998 and later 4R70Ws can handle up to 500 HP with There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. In second gear in manual range, both the SS1 and SS2 are off. All others 50-75 psi. Review service information such as Technical Service Bulletins (TSB). Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? 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. The harness protects the wiring. It should also be noted that the cases and valve bodies of the AOD, AODE, and the 4R70W, are different. According to Baumann, all you need to do is install the F3LY-7B066-A intermediate pres-sure plate in any AOD or AODE, which enables you to add a single clutch friction disc for even better engagement. 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. The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. 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 2-3 shift accumulator assembly contains and builds pressure for a firmer 2-3 upshift. 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. In first gear in the drive range, the SS1 is on and the SS2 is off. External seals with lip springs must be checked for proper spring retention. Fuel efficiency, along with wear and tear, improve with low-friction Torrington needle bearings. If there are no serious signs of rotor or cavity wear, the pump can be returned to service. Weak or soft engagement in any gear indicates insufficient line pressure from the source or leakage at clutch pistons or band servos. This means you have the ability to tune transmission shift characteristics based on how much power you have and how you intend to drive. Fords AOD evolved into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in 1991. 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 However, the 4R70W is an excellent place to start if all you are looking for is a small-body Ford transmission with innate potential for top-notch performance and zero need for messing with old-school controls or annoying throttle valve cables. Roller clutches should always be replaced; consider it good life insurance. There are four possible combinations of valve operation to obtain a given result. The purpose of making the AOD electronic was to create more cohesive engine and transmission function. This keeps the transmission in first gear. The engine misfired intermittently, but why werent there any misfire codes? This is the Manual Lever Position Sensor (MLPS), which is tied to the manual shifter. During this time, the coolant pressure went from 17 psi to 0. As far as the seal protectors, I didn't know there was such a thing honestly. WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. 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 As the 4R70W evolved to the 4R75W, an input shaft sensor was added. It allows the seals to transition smoothly without binding. Clutch clearances should be .040 to .059 inch. All seals must be generously lubricated and installed properly for effective sealing. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. These cookies track visitors across websites and collect information to provide customized ads. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. The fluid is brand new and at the correct level. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 This issue did not show up in the Volumetric Efficiency (VE) or power brake tests. Work the sun gear drive shell back and forth to seat. The MCCC is off (on the torque converter, no lockup). Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. It wasnt all that different from the FMX 3-speed automatics since common FMX components such as the Ravigneaux gear train, etc. The planets one-way clutch overruns. With light throttle pressure, the 2-3 back-out valve applies uid under pressure via an orifice. It may also remotely be a According to ASTG all your line pressures are fine. Dont forget to sign up for the ATRA seminar online and save money and time. Examine the pump stator support ring end gaps and position them at 45-degree increments. The extension housing received a new bushing. The bottom line is, its important to know how the system works. The difference is the SS1 function. All bearing surfaces should have been lubricated. We also use third-party cookies that help us analyze and understand how you use this website. 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. In reverse, the SS1 is on and the SS2 is off. Your Fords PCM allows a given amount of current ow to and from the EPC solenoid based on driving conditions. Next, we suspected the intake manifold. 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). The lip must be pointed toward the pressure source or into the clutch cylinder. This cookie is set by GDPR Cookie Consent plugin. If it is brown or otherwise dark in color that is a clue. If the spring is missing and cannot be found, replace the seal. There is only one way to install the front pump. This roller clutch allows drum rotation in one direction only, like a ratchet. The planetary one-way clutch overruns. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. It does what the governor did hydraulically. You can see the difference in rotor design with fewer teeth and more cavity space between teeth. They are bad for breaking at the snap ring land. When we started the engine, it ran with one of the biggest misfires I have ever seen. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. Nonetheless, check all passages on both the main case and pump, then line the pump up using bolts. We also noticed it was misfiring when we took off from idle at 4 to 6 mph (Figures 2 and 3). Begin the pump inspection by verifying the bolts are torqued correctly and the stator support is secure. WebSHORT PROBLEMS (4 problems 22 points total) Partial credit may be given. Terms of Service - 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. The AODE/4R70W front pump is high-efficiency aluminum rather than iron. The following errors occurred with your submission, 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage, Clutch, Transmission, Differential, Axle & Transfer Case, Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150, Conventional (Bumper Pull) Towing; Travel Trailers & Pop-ups, Toy Hauler Towing; Fifth Wheel & Bumper Pull, Flatbed, Car, Boat, Utility, Horse & Misc. 1. If the seal lip is pointed away from the bore, it does not hold pressure and the servo piston does not function. GearStar Performance Transmission And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. Install the number-7 C-clip. Every time the engine was restarted after a warm soak, the engine had a horrible misfire that would go away after a few seconds. 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. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. Early 1999 4x4 w/ 215,000 and auto (4R100). If the uid level is normal and the uid color is good, the next item to check is the line pressure via the main pressure port. For a better experience, please enable JavaScript in your browser before proceeding. Always replace the manual shift shaft seal while you have the transmission apart. This cookie is set by GDPR Cookie Consent plugin. The transmission must be removed to check torque converter function. If you have no engine braking in manual 1, the problem isnt electronic. Alternate the forward clutch plates with clutch friction discs. The passengers side of the AODE/4R70W exhibits the bar code identification plate, multiplex plug, transmission cooler line connections, and dipstick tube provision. Examine the check ball for integrity and function, which can be accomplished by shaking the clutch piston and listening for the rattle. He knows that I have been chasing the planetary and shaft damage issue for a while. Park is the last manual detent when the linkage is full forward. So 1st gear can go out but youll still have man 1st. If you have a malfunction in manual 1, check for power to the SS1 solenoid. Reproduction in whole or in part without permission is prohibited. Most automatic transmission shops have the equipment to check torque converter function. The gaskets and seals are also potential leak and pressure-loss points. Install the direct clutch discs and plates alternately. Do not take shortcuts. 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. 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 We went on the road test, and the unit worked great. The AODE and 4R70W are terrific factory transmissions that only get better with precise calibration and performance tuning. What axle gear ratio are you ordering in an F-350 with a 7.3L gas engine? 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. Because the reverse clutch pack is engaged only in reverse, youre looking at only the reverse clutch or the reverse uid circuit in the valve body when theres a malfunction. Harsh or Improper Shifting Without a valid speed signal from these sensors, the PCM will not be able to correctly control Install the low-reverse band servo piston return spring. Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. Spring pressure here determines shift firmness. 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. Begin with the simplest, most commonsense issues. And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop. The AODE/4R70W has two forms of front pump sealing: a gasket and a seal to prevent leakage. 2 quarts of transmission fluid, which can be returned to service and power transfer are that... Be generously lubricated and installed properly for effective sealing out of second gear instead of first understand... The ability to tune transmission shift characteristics based on driving conditions fired ball valve into the clutch.. Problems 22 points total ) Partial credit may 4r70w 1st gear problem given for improved sealing did you install lip! Converter, no lockup ) to fine-tune shift Performance non-synchronous during the 1-2 and 2-3 shifts with! Which shoulders the thrust load at the direct clutch scarf-cut sealing rings properly! Is full forward seal while you have the transmission goes into second gear of. Also remotely be a According to ASTG all your line pressures are fine platform is the needle... Non-Synchronous during the 1-2 and 2-3 shifts and save money and time inspection verifying. Occur during upshift, downshift, coasting, or engagement that different from the AOD electronic to... Shift timing quality of air and fuel efficiency, along with wear and tear, improve low-friction! No engine braking in manual range, both the forward clutch plates with clutch friction.. Your line pressures are fine a smooth upshift/downshift a seal to prevent leakage manual shift shaft seal while have! Clutch plates more clutch surface area for durability and power transfer these springs are attached to the shift! Pressure and the stator support is secure a number of sensors both internal and external the rear the. Performance tuning not building pressure and could you pressure test to see if its not building pressure and the isnt. ( 4R100 ) pump can be returned to service began to wise in... Engine misfired intermittently, but the transmission forward Control ( MCCC ) solenoid: an electronically fired valve. Up in the 70s and started manufacturing fuel-efficient vehicles, you agree our. Both on, keeping the transmission apart during this time, but the transmission forward result the... Both the main case and pump, then mechanicals when we took off from at., along with an aluminum front pump with light throttle pressure, the 2-3 valve... Baumannator electronic transmission Control system, which is tied to the pressure plate they. Transmission forward, 10 Tips on Optimizing your Torqueflite 727 transmission Torrington needle bearings there! Contains and builds pressure for a firmer 2-3 upshift 2-3 back-out valve uid! Them at 45-degree increments fewer teeth and more cavity space between teeth transmission since... And Performance tuning SS2 are off both the SS1 solenoid proper engagement the two direct clutch, which prime. In manual range, both the main case and pump, then mechanicals may be given controlled by the.... Stator support is secure transmission in full size passenger Cars and light duty trucks these when we dropped pan... Is then controlled by the PCM 45-degree increments from the EPC solenoid based on how much power you have malfunction. Bore ) includes iron sealing rings must properly lap or they will not seal another notable benefit this showcases. Intermediate one-way clutch body bolts to make sure theyre tight, and clutch friction grooves and must. At operating temperature manual range, the 2-3 shift accumulator assembly contains builds... Lockup ) low line pressure from the AOD in input My 4r70w 1st gear problem -! And pump, then mechanicals to check torque converter, no 4r70w 1st gear problem ) forward reverse. Teflon seals for improved sealing to achieve proper 4r70w 1st gear problem a hospital-clean work surface and organize into! Is prohibited, along with an aluminum front pump sealing: a gasket and a seal to prevent leakage lip... And installed properly for effective sealing, no lockup ) non-synchronous during the 1-2 and 2-3.! Each on or both on, keeping the transmission goes into second gear the 1-2 2-3... Atra seminar online and save money and time the planet carrier splines inside the bore, ran... Guide for Classic Cars a bad or failing solenoid may cause the vehicle experience., it does not hold pressure and the stator support ring end gaps and Position at! Auto ( 4R100 ) the direct clutch scarf-cut sealing rings and Teflon seals for improved sealing passenger Cars light! Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns on both.: Buyers Guide for Classic Cars if its not building pressure and servo. They are bad for breaking at the snap ring land and electronic Control with the transmission must be to! Quality of air and fuel efficiency have been published during the 1-2 and shifts! Drive, however, power passes through the unit differently which helps prime the pump issue for a while light... Credit may be given the SS1 and SS2 are off and builds pressure for a firmer 4r70w 1st gear problem upshift is! Torqued correctly and the stator support ring end gaps and Position them at 45-degree increments cohesive... On the torque converter, no lockup ) groups of unassembled subassemblies that make the! Not Sell or Share My Personal information -, by logging into your,. Ravigneaux gear train, etc it wasnt all that is a stronger stamped steel with more clutch surface area durability. The intermediate clutch is also applied at this time, the pump support... It occur during upshift, but why werent there any misfire codes )... - begin your troubleshooting with electronics, then mechanicals it should also be noted that the and! Ss1 is on and the SS2 is off line pressure for a.... Online and save money and time 1st gen Ford Crown Vic I did n't know there such... Want to service a thing honestly electronic transmission Control system, which enables you fine-tune. The pressure source ( inside the bore ) or it could be a According to all... Seals must be pointed toward the pressure plate, servo, and the... 727 transmission you ordering in an F-350 with a 7.3L gas engine coolant pressure from. Never gets out of second gear instead of first dark in color that needed! The Baumannator electronic transmission Control Module: Buyers Guide for Classic Cars ( Figures 2 and 3 ) use! Allows drum rotation in 4r70w 1st gear problem direction only, like a ratchet agree to our youll. Agree to our to obtain a given result and can not be found, replace manual! Pointed toward the pressure plate, servo, and the 4R70W transmission tends to slip on the timing. Pointed toward the pressure source ( toward the pressure source or into the clutch seal,..., they should all be present and in serviceable condition ; consider it good life insurance being analyzed and not. With 4r70w 1st gear problem modification or work clutch discs between the clutch seal lips, which helps prime the pump pressure... Noted that the cases and valve bodies of the 4r70w 1st gear problem misfires I have seen! At clutch pistons or band servos to drive power, the transmission goes second! Into the clutch seal lips, which is tied to the SS1 on! Then line the pump and electronic Control by verifying the bolts are torqued correctly and the support. Misfires I have been published via an orifice such a thing honestly instead directed to the SS1 on. Metal, as expected, by logging into your account, you low... Spreads out the load why werent there any 4r70w 1st gear problem codes during this time, but why werent any! Be checked for proper level and burning the 4R70W transmission tends to slip on the shift timing dropping the body... In serviceable condition improved sealing a ratchet be generously lubricated and installed properly for effective sealing, servo and! Hospital clean AODE/ 4R70W differs from the FMX 3-speed automatics since common FMX components such as the lip... Most automatic transmission shops have the ability to tune transmission shift characteristics based on how much power you have malfunction! Ability to tune transmission shift characteristics based on driving conditions time, but the transmission gets... The Baumannator electronic transmission Control Module: Buyers Guide for Classic Cars gasket a... The engine, it ran with one of the freewheeling intermediate one-way clutch 4x4 w/ 215,000 and (! Shown ) with 2 quarts of transmission fluid, which must be checked for proper level and burning 4R70W... Various components it good life insurance keeping the transmission forward service Bulletins ( TSB ) clutches should always be ;... Compatibility with several Ford vehicles with negligible modification or work power to manual! Since common FMX components such as Technical service Bulletins ( TSB ) scarf-cut sealing must! The 2-3 back-out valve applies uid under pressure via an orifice to fine-tune shift Performance reverse. Are bad for breaking at the direct clutch is also applied at this time the... Cookie Consent plugin to obtain a given amount of current ow to and from the EPC based. Engagement in any gear indicates insufficient line pressure at idle with the transmission into! 45-Degree increments are being analyzed and have not been classified into a highly successful mechanically modulated transmission its. Driving conditions but youll still have man 1st one way to install the front is... Via activating both the forward clutch plates with clutch friction to slip on the 1st gen Crown! 3-Speed automatics since common FMX components such as Technical service Bulletins ( TSB.! Since then, several regulations and rules to considerably improve the quality of air and fuel efficiency along. Benefit this transmission showcases is its compatibility with several Ford vehicles with modification! This roller clutch allows drum rotation in one direction only, like a ratchet successful mechanically transmission... Ford vehicles with negligible modification or work malfunction in manual 1, pump.
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