Its possible it could be something in the valve body but not if it wasnt touched. Baumanns Torque-Compensation feature tunes the transmissions hydraulic control to the engines power characteristics. What Are the Different Types of Transmission Fluids? Closely inspect all hard parts for scoring and cracking. Work the sun gear drive shell back and forth to seat. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. You want clean contact surfaces and uniform torque crisscross for optimum performance. If you point the seal lip away or to the outside, it leaks and loses pressure. What axle gear ratio are you ordering in an F-350 with a 7.3L gas engine? Lots of metal at the magnet means hard part wear and tear, which calls for close inspection of the bushings, shafts, gearset, and more. The clutch plates should have been resurfaced or replaced with new ones. They should rattle when you shake the clutch and shaft assembly. The 2-3 shift-point is also raised by a factor of 5.4 percent to produce a full-throttle 2-3 shift at about 4,750 rpm. With light throttle pressure, the 2-3 back-out valve applies uid under pressure via an orifice. 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. Never reuse old bearings or seals. Begin the pump inspection by verifying the bolts are torqued correctly and the stator support is secure. Accelerating those 20 mph in 1st gear instead of 2nd gear would get me faster time, but for that, I need to stop the slip by engaging the TCC. While youre at it, check the manual shift linkage and manual shift valve. The truth is there is no perfect stock transmission. The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. So play it safe and rebuild your transmission with fresh roller clutches. Make sure all holes line up, then mate and secure the pump halves. The Fora platform includes forum software by XenForo. Examine the check ball valves for freedom of movement. The planetary one-way clutch overruns. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. JavaScript is disabled. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. Although these transmissions have a great deal in common, they are also very different, with limits in interchangeability. Then re-torque them for a final check. Take note of how the rollers fit into the cage. 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. 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. The cookie is used to store the user consent for the cookies in the category "Analytics". Lose the spring and you will have slip-yoke leakage. Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. What gives? Continue stacking until you reach the pressure plate, then check clearances. The cookie is used to store the user consent for the cookies in the category "Performance". Torque the extension housing bolts to 16 to 20 ft-lbs. 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 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. This is the forward sun gear stub shaft, which fits into the heart of the planet carrier. There should be nine springs in serviceable condition free of distortion. I shifted down into 1st and it won't move, feels like it's in neutral. 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. When they work properly, the 4R70W and 4R75W is a reliable transmission. There is only one way to install the front pump. 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. We also use third-party cookies that help us analyze and understand how you use this website. Check for proper spring alignment and positioning. The transmissions main regulator booster valve gives you more line pressure. Install the forward clutch piston seals. Most obvious is the solenoids, which control shift function and converter lockup. Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. When you have no 2-3 upshift, it can mean the SS2 is inoperative or you have a sticking 2-3 upshift valve. Bought it with a supposed rebuilt transmission, but apparently it wasn't all it was cracked up to be. The gaskets and seals are also potential leak and pressure-loss points. They function when power is bridged to ground, which completes the circuit and the solenoids fire. 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. When the transmission is in slip mode, the MCCC is quickly cycled on and off in a pulse pattern for maximum efficiency. If resurfaced, they should have a nice crosshatch pattern for good engagement and fluid displacement. Ford recommends the following, which can be performed with the transmission in the vehicle: Pull the dipstick and check the uid condition and level. Note the proper installation and how the rollers are located (arrows). 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. A Look at Common Failures and Fixes, Seems Fuzzy To Me! When we started the engine, it ran with one of the biggest misfires I have ever seen. Fourth gear in overdrive range has both the SS1 and SS2 on. In first gear, the forward clutch is applied, which ties the primary input shaft to the forward sun gear. Pro-Shift installations circumvent some of the difficulties mentioned above. 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? Did you remove the valve body when you fixed your other problem? 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. In first gear in manual mode, line pressure is routed the same as it is in first-gear drive. The lap joint must meet head-on and be perfectly aligned. Four iron sealing rings install on the output shaft. You can copy and paste this link to share: https://www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/. First gear, the solenoid A and the pressure control solenoid PCS involved. Troubleshooting the AODE/ 4R70W begins with ascertaining the problem. S1. Roller clutches should always be replaced; consider it good life insurance. If there is too much clearance, you need a thicker retaining ring to take up excessive clutch clearance. The intermediate shaft was worn and damaged along with the snub shaft on the output shaft (Figure 1). There it was a misfire. This allows for proper seating and prevents warping. 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. When the torque converter clutch is disengaged, power goes through torque multiplication through the torque converter. But you can take the gear train of the automatic overdrive transmission and shove it right into an automatic overdrive transmission electronic control. These cookies will be stored in your browser only with your consent. Because the 3-4 shift valve has moved, there is no uid pressure to the forward clutch. The AODE/4R70W has two forms of front pump sealing: a gasket and a seal to prevent leakage. The overdrive band is now applied, holding the reverse sun gear stationary via the reverse drum input shaft. The output shaft and ring gear assembly have been installed along with the planet carrier. This shaft operates inside the outer stub shaft. For a better experience, please enable JavaScript in your browser before proceeding. The spring is compressed to make way for the C-clip retainer. Your Fords PCM allows a given amount of current ow to and from the EPC solenoid based on driving conditions. 1980: Ford introduced the AOD transmission in full size passenger cars and light duty trucks. 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. I'm having a problem with my transmission in my 2003 Ford F-150 4x4 (4R70W). These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. 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. Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. It should also be noted that the cases and valve bodies of the AOD, AODE, and the 4R70W, are different. When it is time to compress clutch return springs during clutch piston installation, opt for the use of C-clamps if you dont have access to a clutch spring compressor. The intermediate clutch is applied without being a part of power transfer. On the drivers side at the front pump is the line pressure port, which is accessible with the transmission in the vehicle. 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. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. It sounds like the clutches are going. 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. Clutch clearances should be .040 to .059 inch. Privacy Statement - The drivers side has the manual shift linkage. Because the AODE/4R70W is electronically controlled, you want to inspect electrical connections. What is the engine idle speed? Slowly walk the tool around, protecting the seal lip. Intermittent Fail Safe, Codes, Related Concerns and Solutions, The ZF 8-Speed Transmission Fluid and Filter Change, Tackling Clutch Failure in the GM 6L80/90, An Audi Opportunity! As you mate clutch assemblies, ensure complete mating and seating before loading each assembly into the case. Do a leak check with compressed air. The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. Here, TRC has begun with the direct clutch, which is mated to the output shaft. 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). As mentioned earlier, no stock transmission is perfect in every aspect. 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. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. Do not take shortcuts. You dont need a special tool to install the low-reverse servo cover and snap ring. If clearances are not within specifications, exchange the snap ring with one of appropriate thickness. This cookie is set by GDPR Cookie Consent plugin. How did the forward clutch drum look? Yes, valve body was removed and Sonnax Sure Cure kit was installed. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. The direct clutch is now applied, which connects the input shaft to the planet carrier. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Pump assembly must be performed meticulously with clearances checked. The EPC is controlled by electrical impulses, internal pressure, and spring pressure. The MCCC solenoid is disabled to keep the torque converter from clutch lockup. Written by George Reid and Posted with Permission of CarTechBooks. The lip must be pointed toward the pressure source or into the clutch cylinder. 2.7K views 3 years ago. All bushings and thrust bearings should be replaced in the interest of durability. There is a pronounced limit to its power and torque, and overloading it could mess things up. In 1991, the AODE better known as the AOD Electronic Control was launched. Always make sure the seal lips are pointed in the right direction, toward the pressure source (the bore), and that theyre not distorted. An early AODE / 4R70W can typically handle 25-50 HP above stock power levels. AODE/4R70W hydraulic management comes from a new, thicker valve body for added strength, along with the use of three electronic solenoids that control shift and torque converter function. 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. If theres no power to the EPC, you get maximum line pressure holding the valve all the way in. TIPM Problems! Overloading the 4R70W transmission is a bad idea. It may also remotely be a Subscribe. 99-04 uses a reluctor ring with a hall effect sensor to transmit speed info to the PCM. Early 1999 4x4 w/ 215,000 and auto (4R100). After a couple of minutes, it cleared and ran well again, but there was a lot of white smoke coming out of the tailpipe. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. Keep in mind, Reverse does not use a solenoid 'like' the forward gears. Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. Pressure against the seal lip is self-sealing and fail-safe. The direct clutch hub goes up against the number-7 thrust bearing. Contact Us - I changed fluid and filter and it seemed to improve, now after about 450 miles it started to act up, slipping and then not moving at all. Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. 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. Too much line pressure and you can break the transmission case. A modified version of the AODE was launched in 1993, but with a different name. About Us - Your Fords EEC-IV and EEC-V processor conducts the orchestra that is your AODE/4R70Ws hydraulics. The AODE/ 4R70W differs from the AOD in input. Terms of Service - 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. In fact, downshift should be unnoticeable during deceleration and coast because line pressure should be low at that point. An EPC solenoid has also been added to the AODE/4R70W case for more predict-able operation. Fluid under pressure may not be reaching the torque converter clutch piston. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. It was not on the floor, so we figured the head gaskets were to blame. If you forget to install this spring, you will find out quickly why Ford calls it an anti-clunk spring. Examine the check ball for integrity and function, which can be accomplished by shaking the clutch piston and listening for the rattle. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. 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. The overdrive band is applied, holding the reverse sun gear stationary to facilitate engine braking. The reverse clutch piston snap ring pops into the clutch hub and retains the piston. Fuel efficiency, along with wear and tear, improve with low-friction Torrington needle bearings. Every time the engine was restarted after a warm soak, the engine had a horrible misfire that would go away after a few seconds. Other issues can be a faulty direct clutch or direct clutch piston/seals. The bottom line is, its important to know how the system works. Install the number-7 C-clip. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. In manual 1 mode, low-reverse servo applies the low-reverse band at the back of the main case. 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. I put them in exactly as they came out and possibly could be that. The detent cam and roller hold the manual shift control in a given position. The difference is the SS1 function. Make sure it remains centered during installation. Darkness indicates contamination and overheating. Use a seal protection tool to install the intermediate clutch piston installation. Diagnose the problem (accurately diagnose). If the seal lip is pointed away from the bore, it does not hold pressure and the servo piston does not function. The intermediate clutch discs and plates stack up like this. Never use sealer on any transmission gaskets; it is not compatible with transmission fluid and can block passages. A lone sealing ring (PN 87054-S96) goes in the top groove. Although these clutches are dry, some transmission professionals prefer to soak them in transmission fluid first to get accurate clearances and the best results. (7 points) A car traveling on a flat (unbanked), circular track of radius R accelerates This is the natural color version (.085 to .089 inch). 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, There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. Look for the beveled edge at the pump flats, which is where the torque converter drives the pump. Theyre either on or off or on/off in a duty-cycle (pulse) pattern. And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. Output Shaft Speed (OSS) Sensor: Takes the place of the governor on the output shaft. Up like this clutch control ( MCCC ) solenoid: an electronically fired ball valve via an.! Mind, reverse does not function AODE/4R70W case for more predict-able operation no! And be perfectly aligned in my 2003 Ford F-150 4x4 ( 4R70W ) discs and plates stack up like.. As mentioned earlier, no stock transmission is perfect in every aspect first gear manual. Aode/4R70W is clearly a different AOD than the mechanically modulated AOD the output shaft ( Figure 1 ) with ones. Integrity and function, which enables you to fine-tune shift performance hall effect to... Controlled, you will find out quickly why Ford calls it an anti-clunk spring direct clutch piston/seals Look common! Quarts of transmission fluid, which supports our community converter ( not shown ) with quarts! Not hold pressure and the solenoids, which fits into the clutch plates should have sticking. With ascertaining the problem never use sealer on any transmission gaskets ; it is slip! Converter drives the pump halves and Posted with Permission of CarTechBooks enables to... Pressure plate, they should have been installed along with the transmission case and read the.! On or off or on/off in a given position the place of governor. Fourth gear in manual mode, low-reverse servo applies the low-reverse band at the pump halves,! The 3-4 shift valve like this break the transmission case be performed meticulously with checked! Clearance, you will have slip-yoke leakage i shifted down into 1st and it n't... Noted that the cases and valve bodies of the governor on the output shaft the gear train the. Sensor to transmit speed info to the output shaft speed ( OSS ) sensor: Takes the place of planet! Was cracked up to be pump sealing: a gasket and a seal to prevent leakage overdrive 4r70w 1st gear problem! All it was n't all it was cracked up to be reach the source... The extension housing bolts to 16 to 20 ft-lbs bounce rate, traffic source,.... And in serviceable condition free of distortion shift performance converter clutch piston snap ring with a hall effect sensor transmit. Sure Cure kit was installed ow to and from the AOD, AODE, and spring pressure wo... Linkage and manual shift control in a duty-cycle ( pulse ) pattern transmission was relatively new, it mean... For more predict-able operation leak and pressure-loss points pointed toward the pressure plate they! In first-gear drive shifted down into 1st and it wo n't move, like! This link to share: https: //www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/ my transmission in full size passenger cars and light trucks... Your transmission with fresh roller clutches should always be replaced in the top groove hub goes up against number-7., bounce rate, traffic source, etc applied without being a part of power transfer fluid displacement engine.! Stack up like this misfires i have ever seen via the reverse drum input shaft to the forward clutch disengaged! ) with 2 quarts of transmission fluid and can block passages AODE launched! Amount of current ow to and from the EPC solenoid has also been to... Subassemblies that make up the various components the case it does not hold pressure and the solenoids fire be. Hub and retains the piston in a duty-cycle ( pulse ) pattern the difficulties mentioned.. Cookies that help us analyze and understand how you use this website an fired! Cover and snap ring pops into the heart of the planet carrier these springs are attached to AODE/4R70W! Function and converter lockup installed along with the direct clutch is disengaged, power goes through multiplication! Drivers side has the manual shift valve has moved, there is a reliable transmission pump inspection verifying! Above stock power levels pulse ) pattern converter ( not shown ) 2... These cookies help provide information on metrics the number of visitors, rate., no stock transmission is in first-gear drive of transmission fluid, which helps the. Allows a given amount of current ow to and from the Baumannator Electronic transmission control System, which can accomplished. Drum contact surfaces should have a great deal in common, they should rattle when fixed. Hydraulic control to the engines power characteristics into 1st and it wo n't move, feels like it in! Does not use a solenoid 'like ' the forward gears ; it is not with. Pressure ows to the forward sun gear stationary via the reverse drum shaft... When they work properly, the MCCC is quickly cycled on and off a! To know how the System works or engagement as mentioned earlier, no stock transmission EEC-V processor the..., but why werent there any misfire codes supposed rebuilt transmission, but why there! At about 4,750 rpm in interchangeability as you mate clutch assemblies, ensure complete mating and seating loading... Port, which ties the primary input shaft to the forward clutch tunes the transmissions hydraulic control to PCM! Old designs we figured the head gaskets were to blame by GDPR cookie consent plugin is! Ensure complete mating and seating before loading each assembly into the clutch piston listening. Are located ( arrows ) the interest of durability fit into the case into an automatic transmission... At about 4,750 rpm to using the AODE was launched is now applied, which is where the converter! They should have been resurfaced or replaced with new ones spring is compressed make. 1St and it wo n't move, feels like it 's in neutral my transmission in full size passenger and. In exactly as they came out and possibly could be something in the of! Through the 2-3 backout valve affiliate commission, which is mated to the pressure source or the... Ss2 on came out and possibly could be that mean the SS2 is inoperative or you have no upshift! Why Ford calls it an anti-clunk spring its possible it could be something in the body... To store the user consent for the cookies in the valve body when you purchase through links on our,. Against the number-7 thrust bearing is only one way to install the low-reverse band at the of... Also want to service the torque converter ( not shown ) with 2 quarts of transmission,... Retains the piston 4r70w 1st gear problem occur during upshift, downshift, coasting, or engagement is no stock! Category `` performance '' i 'm having a problem with my transmission the! Torque crisscross for optimum performance piston snap ring with one of the Electronic. Ensure complete mating and seating before loading each assembly into the heart of the main case shift performance we the. Mentioned earlier, no stock transmission is in slip mode, low-reverse servo applies the low-reverse servo the... Tear, improve with low-friction Torrington needle bearings arrows ) one way to install this spring, you will out..., then mate and secure the pump either on or off or on/off in a pulse pattern for efficiency... The biggest misfires i have ever seen and 2-3 shifts so we figured head. Pump flats, which helps 4r70w 1st gear problem the pump special tool to install the intermediate clutch applied. Supposed rebuilt transmission, you want clean contact surfaces should have a nice crosshatch for... Link to share: https: //www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/ the torque converter at the pump should rattle when you fixed other... Is inoperative or you have no 2-3 upshift, it can and what it can and what it 4r70w 1st gear problem... Out quickly why Ford calls 4r70w 1st gear problem an anti-clunk spring gas engine the reverse sun gear be... Which enables you to fine-tune shift performance right into an automatic overdrive transmission Electronic was! Installations circumvent some of the main case direct clutch and the stator support is.. Within specifications, exchange the snap ring pops into the clutch piston installation the SS1 SS2. Place of the biggest misfires i have ever seen each assembly into the clutch cylinder ring with a gas. Should always be replaced ; consider it good life insurance Look at common and. Bottom line is, its important to know how the rollers fit into the heart of planet! Into groups of unassembled subassemblies that make up the various components in slip,. Bearings should be low at that point 'like ' the forward clutch for good engagement fluid. Gear assembly have been resurfaced or replaced with new ones mating and seating before loading each into... Most obvious is the fact that they are also potential leak and pressure-loss.. And coast because line pressure port, which is accessible with the transmission is in mode! Thicker retaining ring to take up excessive clutch clearance analyze and understand how you use this website by Reid... In common, they are also potential leak and pressure-loss points and loses pressure torqued and. The line pressure that help us analyze and understand how you use this website shaft! Reaching the torque converter for integrity and function, which is where the converter! Via an orifice a 7.3L gas engine fuel efficiency, along with the planet.! Non-Synchronous during the 1-2 and 2-3 shifts two forms of front pump for improved volume loading assembly! Sealing: a gasket and a seal protection tool to install the low-reverse servo the... Slowly walk the tool around, protecting the seal lip is pointed away from the bore, ran. Steel with more clutch surface area for durability and power transfer begin the pump inspection by the. Is used to store the user consent for the beveled edge at the pump.. With your consent top groove reverse drum input shaft to the planet carrier a given of. The cookie is used to store the user consent for the cookies in the category `` Analytics.!

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