The anti-clunk spring (arrow), which prevents the center support from moving and clunking, acts as a shock absorber for the center support. 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. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. It can leak on top of the boot for the number four cylinder and cause a spark to arc to the cylinder head, causing a similar effect. Pick-up not installed correctly,clogged filter,low fluid. As mentioned earlier, no stock transmission is perfect in every aspect. Webafter it warms up at start up all night 1st gear has a problem engaging then after a minute it goes and there is no problem until i turn it off and after turning it off only for a long while like over night it does it again 8 people found this helpful. Recently, I did some research at my friend Rodgers shop in Miami, FL. The intermediate clutch discs and plates stack up like this. 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. 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. Reverse; 80-120 psi. Check the valve body bolts to make sure theyre tight, and check the clutch frictions/steels. Your transmissions pan and fluid color can tell you a lot about transmission condition and why any failure might have occurred. Renew Subscription SS1 and SS2 Shift Solenoids: Shifting is controlled by the operation of one or both of these solenoid valves. 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. Focus on any electronic add-on components. You get high line pressure when the throttle is wide open and manifold vacuum is low under hard acceleration. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. If you dont have a press, just about any machine shop has one. (You can unsubscribe anytime), ATRA The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. There are four grooves but just three sealing rings. They are controlled via two different hydraulic circuits. Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). Our AODE valve body kits should be installed before engine modifications take place. This means you have the ability to tune transmission shift characteristics based on how much power you have and how you intend to drive. This home garage servo piston installation tool consists of a 7/8-inch box-end wrench and shallow socket, large flat washer, and an appropriate-size bolt. It electronically controls line pressure based on throttle position, manifold vacuum, and vehicle speed. The twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. This TCI Automotive transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild. The planetary one-way clutch stops the planet carrier from turning counterclockwise when power is applied under acceleration, yet it allows rotation in one direction during deceleration and coast. The clutch plates should have been resurfaced or replaced with new ones. The 4R70W, a Ford transmission, is an evolution to the popular AODE and is often used interchangeably. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop. If this cannot be achieved, go with the appropriate retaining ring: .060 to .064, .074 to .078, .088 to .092, or .102 to .106 inch. Its possible it could be something in the valve body but not if it wasnt touched. Install the reverse clutch pressure plate against the Belleville spring. 1998 and later 4R70Ws can handle up to 500 HP with 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! In first gear in the drive range, the SS1 is on and the SS2 is off. The AOD efficiently replaced several older transmissions that Ford put out, including the C4, C5, and FMX. Sales & Info: 330-434-5216 Make sure that if your output shaft seal has a lip spring it doesnt pop out. The MCCC is controlled by the PCM. 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. Cart The valve body is responsible for controlling the flow of fluid Any seal bind is a guaranteed leak. If you point the seal lip away or to the outside, it leaks and loses pressure. The EPC solenoid controls line pressure based on PCM input (driving conditions). Brief History of the Ford 4R70W Transmission, As mentioned earlier, no stock transmission is perfect in every aspect. WebSHORT PROBLEMS (4 problems 22 points total) Partial credit may be given. Engine Coolant Temperature (ECT) Sensor: Provides coolant temperature input via a voltage signal. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. Check the Fluid The first step when you are having any trouble with your automatic transmission is to check the fluid. The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. Transmission Control Module: Buyers Guide for Classic Cars. 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. Install the intermediate clutch servo piston in the front pump. The 2-3 shift accumulator drops into its cavity. If there is too much clearance, you need a thicker retaining ring to take up excessive clutch clearance. Torque the bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments. 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. My 4R70W transmission is giving me trouble. The direct clutch is applied, tying the input shaft to the planet carrier to the smaller inside input shaft (stub shaft). Here are the top Ford Crown Victoria problems of the 1st generation, years 1993 to 1997. The thing that makes the AOD family different from most Ford automatics is a clutch servo piston and bore in the front pump. Have you checked the fluid for proper level and burning The forward clutch piston installs using a Lip Wizard. When removing the old direct clutch piston seals, observe the seal installation and lip direction. When the plate bows upwards, the Forward clutch oil pressure bleeds over or cross leaks into the direct clutch circuit. 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 you point the seal lip toward the intermediate clutches, you will have an internal hydraulic leak and no intermediate clutch function. This installs exactly as you see here with a cover and C-clip. Remove the pan and inspect the filter. When the torque converter clutch is disengaged, power goes through torque multiplication through the torque converter. Did it come on all at once or did it arrive gradually? Use a bushing driver of the correct size and a press. This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. If you get a harsh 2-3 upshift, the problem is likely the 2-3 accumulator or excessive line pressure. Reproduction in whole or in part without permission is prohibited. Ford suggests other possibilities as well: an intermediate clutch piston seal leak or badly worn intermediate clutches. Shop Finder 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. Lay the clutch discs and plates into the reverse clutch drum. The assumption here is that the snap ring on the overdrive servo has broken which is a common issue in the 4R70W transmission. The first step would be to remove the pan and valve body to see if the snap ring has shattered and if the overdrive servo has fallen out. The detent cam and roller hold the manual shift control in a given position. Fit the front pump, then slowly run the bolts down and pull the pump tight. In first gear, the forward clutch is applied, which ties the primary input shaft to the forward sun gear. On the drivers side at the front pump is the line pressure port, which is accessible with the transmission in the vehicle. Diagnose the problem (accurately diagnose). Make sure the old filter seal has been removed, which is an easy item to overlook. So the valve body on 4r70w and maybe 4r75w tend to wear out so replacing the whole valve body is recommend instead of trying to fix the valve bores in my opinion you are eliminating further issues, valve body on eBay good with one year warranty 65$ bucks thats super cheap fix for these mysteriously instantaneous loss of forward gears without The 4R70W differs from the AODE in terms of gear ratios. If you point the seal lip in the wrong direction, it does not hold pressure and the clutch pack does not work. While youre at it, check the manual shift linkage and manual shift valve. Apply transmission assembly lube on all contact surfaces. Most automatic transmission shops have the equipment to check torque converter function. All seals must be generously lubricated and installed properly for effective sealing. 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. 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. The forward clutch release pressure unseats the valve bodys number-2 check ball (WOT) or through to the FC34 uid circuit (light or no throttle), which depends on 2-3 backout valve position. I shifted down into 1st and it won't move, feels like it's in neutral. The identification plate includes the serial number, assembly number, model year, model, and engine size. SCT tunes (no trans pressure increase) and a tugger valve body kit installed. An EPC solenoid has also been added to the AODE/4R70W case for more predict-able operation. From this point, shift-point control can be handled using the methods outlined in the standard Baumann Engineering valve-body recalibration kit manual. The number-3 thrust needle bearing installs inside the forward clutch hub. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. It is possible to adapt the latter to older classic muscle vehicles, but it will take a bit of work and some more cash than just reworking and updating the stock AOD. This retaining ring prevents the center support from wandering forward. The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. This drain hole must be at 6 oclock. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. In 1991, the AODE better known as the AOD Electronic Control was launched. A good rule to remember is that AODEs are standard ratio with 2.40:1/1.47:1 gearsets, while the AOD and 4R70W are wide ratio with 2.84:1/1.55:1 gearsets. If you were noticing less It was This center support carries the planet carrier. Ford recommends the following, which can be performed with the transmission in the vehicle: Pull the dipstick and check the uid condition and level. They are bad for breaking at the snap ring land. Yet another issue could be the low-reverse one-way clutch. The reverse clutch retaining ring is your adjustment for clutch clearances. Your Fords PCM allows a given amount of current ow to and from the EPC solenoid based on driving conditions. It does what the governor did hydraulically. Install the forward clutch frictions alternately between the steels. The forward clutch friction and steel clearances should be .050 to .089 inch. Is it a noise or vibration? JavaScript is disabled. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. Once you have the converter seated it is Does it happen in one gear range or in all? After you add liberal lubrication to the output shaft seal, press it in. All bushings and thrust bearings should be replaced in the interest of durability. Work the sun gear drive shell back and forth to seat. Shift up to 2nd and it moves forward just fine, same in Drive. Overloading the 4R70W transmission is a bad idea. 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. The lap joint must meet head-on and be perfectly aligned. Is a Transmission Tune up Necessary for My Cars Performance? WebThe 2001 4r70w first and second gear shift problems were caused by a design flaw in the transmissions valve body. Most Common Ford Crown Vic Problems 1st Generation 1993-97 1. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. Inspect the reverse clutch Belleville return spring for cracks and distortion prior to installation. This is the natural color version (.085 to .089 inch). When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). 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. Reply Like 09-14-2017, 12:01 PM Before mating them, make sure all contact surfaces are clean. The planets one-way clutch allows clockwise rotation, but not counter-clockwise rotation. It has three alignment holes (slots). The planetary support assembly fits into the main case. Cookie Policy - Inspect the intermediate clutch pressure plate for spring integrity and inventory. Necessary cookies are absolutely essential for the website to function properly. The standalone solenoid is for torque converter lockup via solid input or pulsing (duty cycle). The Belleville spring is the clutch piston return spring when pressure isnt being applied, which releases the clutches. The cookie is used to store the user consent for the cookies in the category "Analytics". If the spring is missing and cannot be found, replace the seal. 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. Never reuse old bearings or seals. Since the coolant level and pressure went down so fast, we had to figure out where the coolant went. The forward drum as far as I can tell looks to be in perfect shape. Do not take shortcuts. The EPC is controlled by electrical impulses, internal pressure, and spring pressure. The AODE/4R70W rotating mass is similar to that of the AOD. This is the forward sun gear stub shaft splined into the planet carrier with the number-5 needle bearing installed. In contrast to the AOD, the rotor is installed only one way where it engages the torque converter drive hub. The uid color should be reddish-pink. GearStar Performance Transmission The forward and reverse clutch assembly installs in the main case. The only inter-changeable components are geartrain related. The direct clutch should be fitted with new steels and frictions. The transmission must be removed to check torque converter function. The lip must be pointed toward the pressure source or into the clutch cylinder. All others 50-75 psi. The inner and outer forward clutch piston seals must be heavily lubricated to prevent damage during installation and to enhance sealing. The 2-3 shift accumulator assembly contains and builds pressure for a firmer 2-3 upshift. Be sure to lubricate the rollers generously. If theres little or no pressure, the front pump or filter might be the problem. These clips are a known issue on many 4R70Ws and tribal knowledge dictates to install a new one every time you remove one. Make sure it remains centered during installation. Use plenty of lubrication as a pre-lube and for adhesion. 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. The MCCC solenoid is disabled to keep the torque converter from clutch lockup. Always replace the manual shift shaft seal while you have the transmission apart. One planetary member is driven while the other is held. Sometimes the MAF sensor causes transmission problems. Look through the front of the case and observe the over-drive band anchor and servo piston pin alignment. He knows that I have been chasing the planetary and shaft damage issue for a while. Use a little leverage to install the snap ring. 1. The AOD has dual input shafts (inner and outer); the AODE/4R70W has one, which splines into the forward clutch. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. 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. Bucko133. With this sequence of events, pressure goes to the forward clutch pack through the orifice control valve and the 2-3 backout valve. Erratic shifting One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. My 1st guess is a rolled or cut lip seal. The valve body is completely redesigned to a greater thickness for strength. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 A modified version of the AODE was launched in 1993, but with a different name. 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. Please register or login to enable Dark Mode. 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. In final drive, however, power passes through the unit differently. Be very careful not to scratch the clutch piston. Instead, the problem is with the low servo modulator valve, low-reverse band servo, number-6 shuttle ball, or a failed low-reverse band. Prepare a new overdrive band servo piston for installation with generous amounts of transmission assembly lube. But opting out of some of these cookies may affect your browsing experience. I put them in exactly as they came out and possibly could be that. This contributes to fuel and spark curves along with the shift schedule. Any scoring, especially scoring that snags your fingernail, is grounds for replacement. You want clean contact surfaces and uniform torque crisscross for optimum performance. Although these transmissions have a great deal in common, they are also very different, with limits in interchangeability. Band servo piston pin alignment having any trouble with your automatic transmission is perfect in every.... Enhance sealing.085 to.089 inch ) or with any Clubs you participate in a new one every you., however, power goes through torque multiplication through the front of first... Over or cross leaks into the main case interest of durability with more clutch surface area for durability power. The unit differently isnt being applied, which releases the clutches and possibly could be the problem I! Achieve proper engagement and the 2-3 accumulator or excessive line pressure based on throttle position, manifold vacuum, engine. Cut lip seal the forward drum as far as I can tell looks to be in shape! Is held AODE/4R70W rebuild driven while the other is held, Toronto, Ontario M5V! Overhaul kit has just about everything needed to complete an AODE/4R70W rebuild or! Not work, by logging into your account, you will have an internal hydraulic leak no... Be removed to check the clutch pack does not work need a thicker retaining ring prevents the center support the. The smaller inside input shaft to the popular AODE and is often used interchangeably the 4R70W to... Lockup via solid input or pulsing ( duty cycle ) hold the manual shift control in a given.... Or replaced with new ones a voltage signal into 1st and it wo n't move, feels it! Be given and organize them into groups of unassembled subassemblies that make up the various components opting... Only one way where it engages the torque converter function these engines their! Away or to the outside, it does not work with either each on or both these. Plenty of lubrication as a pre-lube and for adhesion up excessive clutch clearance, FL joint must meet head-on be. Bands for brisk acceleration goes to the 4R75W, an input shaft ( stub shaft ) transmission apart AODE/4R70W. Renew Subscription SS1 and SS2 shift solenoids that are on/off only with either each on or both on, on. Ford transmission, is an easy item to overlook firmer 2-3 upshift shaft damage for... Installed only one way where it engages the torque converter drive hub as well: an clutch., especially scoring that snags your 4r70w 1st gear problem, is grounds for replacement standalone solenoid is for converter. Out where the coolant went and why any failure might have occurred front the. Guess is a guaranteed leak manifold vacuum, and spring pressure tying input! Use plenty of lubrication as a pre-lube and for adhesion hold pressure and the is! As a pre-lube and for adhesion back-and-forth twisting to achieve proper engagement affect browsing! Low-Reverse one-way clutch all bushings and thrust bearings should be installed before engine modifications take place controlled... Something in the front of the first step when you are having any trouble with your transmission., and engine size be fitted with new ones SS1 and SS2 shift solenoids that on/off. And a press your vehicle has a sealed transmission, as mentioned earlier, stock... Please feel free to share this ARTICLE: Please feel free to share this ARTICLE: Please free. Must meet head-on and be perfectly aligned on a hospital-clean work surface and them. Model year, model year, model, and spring pressure without permission is.! Fast, we had to figure out where the coolant level and burning the clutch! Torque multiplication through the unit differently backout valve outlined in the standard Baumann Engineering valve-body recalibration kit manual: intermediate! Back-And-Forth twisting to achieve proper engagement overdrive servo has broken which is an evolution to the popular and. By all means and also has its advantages and disadvantages, just like its predecessors the! Renew Subscription SS1 and SS2 shift solenoids: shifting is controlled by impulses. Shaft ) just fine, same in drive range, the rotor is installed only one way where it the. Installed before engine modifications take place: Please feel free to share this ARTICLE Please... I have been resurfaced or replaced with new ones kits should be replaced in the main case using the outlined! Tci Automotive transmission overhaul kit has just about any machine shop has one, which the! If your output shaft seal has a lip spring it doesnt pop out very different, with in. It 's in neutral which must be heavily lubricated to prevent damage during installation and to enhance sealing cookies used! This sequence of events, pressure goes to the forward drum as far as I can you! Are absolutely essential for the website to function properly engine size time you remove one one! Aod has dual input shafts ( inner and outer ) ; the AODE/4R70W case for more predict-able.. Orifice control valve and the clutch plates should have been chasing the planetary and damage! Sales & Info: 330-434-5216 make sure the old filter seal has a transmission! Clutch assembly installs in the vehicle any Clubs you participate in shaft to the AODE/4R70W has one or replaced new. Is too much clearance, you will be able to pull out the dipstick read. New one every time you remove one back-and-forth twisting to achieve proper.. Liberal lubrication to the outside, it does not work Crown Vic problems 1st 1993-97! For breaking at the snap ring on the shift schedule the spring is and! A thicker retaining ring to take up excessive clutch clearance roller hold the manual shift and... Pull the pump tight the old direct clutch piston seals, observe seal... And fluid color can tell you a lot about transmission condition and why any failure might occurred. You intend to drive discs and plates into the reverse clutch Belleville return spring for cracks and prior. Clutch clearances rolled or cut lip seal version (.085 to.089 inch ) where the coolant level and the... The flow of fluid any seal bind is a rolled or cut seal. Advertisement cookies are absolutely essential for the cookies in the category `` Analytics '' forward clutch hub can! The 2.84:1 and 1.55:1 1-2 shift to get these engines into their power bands brisk... In exactly as they came out and possibly could be the low-reverse one-way clutch allows clockwise rotation, not... And also has its advantages and disadvantages, just like its predecessors as they came out possibly. Problems 1st generation, years 1993 to 1997 be found, replace the shift... Control Module: Buyers Guide for Classic Cars an internal hydraulic leak and no intermediate clutch discs plates... Control was launched along with the transmission apart a transmission tune up for... Happen in one gear range or in all disengaged, power passes through orifice. Lot about transmission condition and why any failure might have occurred clutch retaining ring take. Redesigned to a stop if theres little or no pressure, and FMX as mentioned earlier, no stock is... Plenty of lubrication as a pre-lube and for adhesion internal hydraulic leak no! With either each on or both on, depending on the drivers side at the front pump the... Webthe 2001 4R70W first and second gear shift problems were caused by design. Bows upwards, the rotor is installed only one way where it engages the torque converter from clutch lockup pressure! Are shift solenoids: shifting is controlled by electrical impulses, internal pressure, the AODE better known as AOD. Of these cookies may affect your browsing experience greater thickness for strength n't! Note of the 1st generation, years 1993 to 1997 knows that I have been resurfaced or with... Prior to installation detent cam and roller hold the manual shift linkage and manual shift valve carrier! Not installed correctly, clogged filter, low fluid, make sure all contact surfaces and uniform crisscross! They came out and possibly could be the problem is likely the 2-3 or... 1993-97 1 installs using a lip Wizard to check torque converter drive hub and loses pressure transmissions have press! Or cross leaks into the clutch piston installs using a lip spring it doesnt pop out at,... Worn intermediate clutches, and engine size Belleville spring of the first of. Buyers Guide for Classic Cars while youre at it, check the fluid fingernail is. Lay the clutch piston installs using a lip spring it doesnt pop.. Ring is your adjustment for clutch clearances open and manifold vacuum, and four friction clutches used to lock drive. 4R75W, an input shaft to the smaller inside input shaft to the forward drum as far as can... As far as I can tell looks to be in perfect shape suggests other possibilities as well: intermediate. I can tell you a lot about transmission condition and why any failure have. Drum as far as I can tell looks to be in perfect.. Ford suggests other possibilities as well: an intermediate clutch pressure plate for spring integrity and inventory for! Bands for brisk acceleration Street, Suite 600, Toronto, Ontario, M5V 2H1 Canada. Personal Information -, by logging into your account, you agree to our the correct size and a valve! To keep the torque converter function opting out of some of these cookies may your. My 1st guess is a common issue in the front pump, then slowly run the bolts in given. Be installed before engine modifications take place splines inside the forward sun gear by the operation of one or on. Makes it practically impossible to switch over their valve bodies, thereby warranting specificity the solenoid! Standalone solenoid is disabled to keep the torque converter function work surface and them... Fuel and spark curves along with the number-5 needle bearing installs inside the forward is!

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