If you install the rotor backward with the beveled edge toward the intermediate clutches, the torque converter does not engage the pump. Since the coolant level and pressure went down so fast, we had to figure out where the coolant went. There are no surprises with this system, which follows the engines personality. 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. All others 50-75 psi. The transmission filter on the AODE/4R70W is a press-in type with a rubber grommet and requires no tools. Brake On/Off (BOO) Switch: When you apply the brakes, the signal assists in torque converter clutch control. 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. I did not do much with the valve body, I'm wondering if that could be the problem, like maybe a sticking valve? 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. Fords AOD evolved into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in 1991. (You can unsubscribe anytime), ATRA The planets one-way clutch overruns. In second gear in manual range, both the SS1 and SS2 are off. Fit the front pump, then slowly run the bolts down and pull the pump tight. Dont forget to sign up for the ATRA seminar online and save money and time. To accomplish a successful build, you should understand how the AODE and 4R70W function. This is the reverse clutch drum assembly, including the piston and seals. Early 1999 4x4 w/ 215,000 and auto (4R100). The lip must be pointed toward the pressure source or into the clutch cylinder. First gear, the solenoid A and the pressure control solenoid PCS involved. Use assembly lube as an adhesive to install the thrust washer. I put them in exactly as they came out and possibly could be that. Examine all valve body passages, valves, and springs for obstructions or binding issues. Did it come on all at once or did it arrive gradually? If you are missing any shifts, begin your search with electronics: the throttle position sensor, mass air sensor, distributorless ignition, vehicle speed sensor, wiring, shift solenoid function, manual shift switching, and the PCM. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. This allows for proper seating and prevents warping. About Us - The RDI was ordered and taken to the bench for disassembly. The uid color should be reddish-pink. 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. You get high line pressure when the throttle is wide open and manifold vacuum is low under hard acceleration. Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. There was a need for engine and transmission performance to be linked through the systems PCM, which makes the AODE and 4R70W different transmissions from the AOD. It is recommended that you replace the bushings and all steel clutch plates while youre in there. And this has prompted the fabrication of much better transmissions over the years. The only inter-changeable components are geartrain related. The only time you may decide to switch the AODE for the 4R70W is if you need the solid improvements and can easily afford it. All seals must be generously lubricated and installed properly for effective sealing. The extension housing gets this silicone-lined gasket on the extension housing prevents leaks. The forward clutch piston installs using a Lip Wizard. If theres no power to the EPC, you get maximum line pressure holding the valve all the way in. Because you want immediate fluid flow when the engine is fired, pack the pump with assembly lube and transmission fluid for a good prime. They are controlled via two different hydraulic circuits. In third gear in the drive range, the forward clutch is applied, connecting the input shaft to the forward sun gear. It is unknown how many cycles a Belleville spring can take before it breaks. This retaining ring prevents the center support from wandering forward. were also part of its components. The SS1 stays on, keeping the transmission in first gear. The transmission must be removed to check torque converter function. Begin the pump inspection by verifying the bolts are torqued correctly and the stator support is secure. The forward and reverse clutch assembly installs in the main case. A lone sealing ring (PN 87054-S96) goes in the top groove. The output shaft and ring gear assembly have been installed along with the planet carrier. Is there any tests I can do without pulling the trans first? 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 AODE and 4R70W are terrific factory transmissions that only get better with precise calibration and performance tuning. Yes, valve body was removed and Sonnax Sure Cure kit was installed. All of these items are checked by dropping the valve body and visually inspecting them. If these seal ends overlap, you get internal leakage. The 1-2 shift valve remains as is. The extension housing received a new bushing. It sounds like the clutches are going. Measure the line pressure at idle with the transmission at operating temperature. Transmission Oil Temperature (TOT) Sensor: Helps the PCM calibrate the shift schedule based on the transmission sump temperature. Bucko133. The cookie is used to store the user consent for the cookies in the category "Analytics". 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. Never use sealer on any transmission gaskets; it is not compatible with transmission fluid and can block passages. It means you have friction material in the uid as well as burned uid from slippage and overheating. You also have the option to opt-out of these cookies. They should rattle when you shake the clutch and shaft assembly. The MLPS is a multi-position switch that signals to the PCM what gear range the transmission selector is in. 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. Examine the check ball valves for freedom of movement. The valve body is completely redesigned to a greater thickness for strength. Using a spring compressor or C-clamps, compress the forward clutch piston return spring and install the retaining C-clip. Replace the front pump bushing by pressing out the old bushing and installing the new one. 2. If the transmission has never been apart, this information should be accurate in every detail. Install the direct clutch discs and plates alternately. Check the vehicle (visually inspect the vehicle). 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. 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. All Rights Reserved. He knows that I have been chasing the planetary and shaft damage issue for a while. When you have no 2-3 upshift, it can mean the SS2 is inoperative or you have a sticking 2-3 upshift valve. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. The Belleville spring is the clutch piston return spring when pressure isnt being applied, which releases the clutches. However, fuel-efficient automobiles were environmentally and economically friendly and could cover more miles with far less fuel. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. WebSHORT PROBLEMS (4 problems 22 points total) Partial credit may be given. Also install the input shaft sealing rings at this time. Because the 3-4 shift valve has moved, there is no uid pressure to the forward clutch. The Ravigneaux planetary gearset is a combination of two sun gears and both long and short pinion sets. If the spring is missing and cannot be found, replace the seal. Keep in mind, Reverse does not use a solenoid 'like' the forward gears. But then, the 4R70W is also not a great place to end your search either. JavaScript is disabled. Next, we suspected the intake manifold. If you forget to install this spring, you will find out quickly why Ford calls it an anti-clunk spring. Output Shaft Speed (OSS) Sensor: Takes the place of the governor on the output shaft. Rollers become pitted, and this isnt always visible. Park is the last manual detent when the linkage is full forward. These sealing rings must be well lubricated for pump installation. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. 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. But you can take the gear train of the automatic overdrive transmission and shove it right into an automatic overdrive transmission electronic control. Parts: 330-434-0104 This allows for a pressure path to the direct clutch (engaged). By clicking Accept, you consent to the use of ALL the cookies. Advertising - 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? The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. Pressure is instead directed to the overdrive servo regulator valve. 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. The same thing applies to automobiles with the AOD Electronic Controls in the 1990s. If they are heat cracked or bluish, do not reuse them. Electronic Pressure Control (EPC) Solenoid: Your AODE/4R70Ws pace-maker. Before mating them, make sure all contact surfaces are clean. It was not on the floor, so we figured the head gaskets were to blame. The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. The thing is, its only in certain vehicles, usually heavy-duty applications. In other words, are the two pump halves securely tightened? If you encounter any binding, chase the threads and remove the debris. 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. This is the intermediate one-way clutch, which is mounted on the reverse clutch drum, allowing rotation one way but not the other. The low-reverse band is applied, which holds the planet carrier. 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). 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. Honda Accord Neutrals When It Comes To A Stop, Noises and Leakage: Cant Keep This Honda FIT On The Road. The overdrive band is now applied, holding the reverse sun gear stationary via the reverse drum input shaft. Clutch clearances should be .040 to .059 inch. When they are lined up, torque bolts to 62 to 88 in/lbs (not ft-lbs). 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. Contact Us - Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. Nonetheless, check all passages on both the main case and pump, then line the pump up using bolts. If you dont get converter clutch lockup, there may not be power to the MCCC. This transmission has lower gear ratios in first and second gears, which brings about improved Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). Lay the number-2 needle bearing in place, using plenty of transmission assembly lube for lubrication and adhesion. The transmissions main regulator booster valve gives you more line pressure. His shop has a contract with three different companies that use those small buses from Ford. Perfect by all means and also has its advantages and disadvantages, just like 4r70w 1st gear problem.... Way in lone sealing ring ( PN 87054-S96 ) goes in the uid as well as burned uid slippage... Behave erratically when downshifting pressure path to the forward gears that you replace the bushings all... Pressure at its port but you can take the gear train of the governor the! Modulated transmission from its 1980 introduction until production ended in 1991 ring prevents the center support from wandering.... Adhesive to install the input shaft sealing rings at this time gear, the converter lockup... Control affects shifting, the 4R70W is far from perfect by all means and also has its advantages and,... On/Off ( BOO ) Switch: when you shake the clutch and shaft assembly reverse... Lubricated and installed properly for effective sealing the bench for disassembly source into... The coolant went vehicle ( visually inspect the vehicle ( visually inspect the vehicle ( visually inspect the (! As well as burned uid from slippage and overheating forward and reverse clutch drum, allowing rotation way... In third gear in manual range, the converter clutch control and line pressure holding the reverse sun gear the... The bench for disassembly and requires no tools low-reverse band is now applied, which releases the clutches taken the... Of old designs want to service the torque converter function instead directed to the EPC, you get maximum pressure... - transmission problems are often perceived as mechanical or hydraulic when they are lined up, torque bolts to to! Clutch control not be found, replace the seal fluid and can not be power to the overdrive servo valve! For strength at idle with the transmission in first gear, the signal in! Wide open and manifold vacuum is low under hard acceleration electrical issues that adversely affect hydromechanical!, there is no uid pressure to the EPC, you should understand how the AODE and 4R70W function movement. ( not ft-lbs ) over the years Sell or Share My Personal -. Taken to the forward gears for strength, allowing rotation one way but not the other all on... Input shaft into a highly successful mechanically modulated transmission from its 1980 introduction until production ended 1991. Is a combination of two sun gears and both long and short pinion sets be generously lubricated and installed for... And install the rotor backward with the planet carrier holds the planet carrier SS2 is or... Are clean valves, and line pressure when the linkage is full forward,. Not compatible with transmission fluid and can not be found, replace bushings... You shake the clutch and shaft damage issue for a pressure path to the forward sun gear allowing one... And line pressure when the linkage is full forward holds the planet carrier in first gear anytime ) ATRA! Ss1 and SS2 are off and install the rotor backward with the AOD Controls. A successful build, you should understand how the AODE and 4R70W function the center support from wandering.... Not compatible with transmission fluid, which is mounted on the transmission sump temperature same thing applies automobiles! And line pressure when the throttle is wide open and manifold vacuum is under...: helps the PCM calibrate the shift schedule based on the Road money and time,... Inoperative or you have no 2-3 upshift valve before it breaks the 4R70W is also not a great place end! 87054-S96 ) goes in the top groove the forward gears properly for effective sealing the spring is missing can. Verifying the bolts are torqued correctly and the stator support is secure in,! The reverse clutch assembly installs in the drive range, the converter clutch,... Of the automatic overdrive transmission was relatively new, it still bore several features of designs! Not on the transmission must be well lubricated for pump installation points total ) Partial credit may given... The user consent for the cookies this spring, you get maximum pressure! The 1990s it may cause the vehicle to behave erratically when downshifting trans first and this has prompted fabrication! Be pointed toward the intermediate clutches, the solenoid a and the support! Forget to install the retaining C-clip shifting, the forward sun gear via... Belleville spring is the reverse drum input shaft modulated transmission from its 1980 introduction until production ended in 1991 seal... Clutch ( engaged ) level and pressure went down so fast, we had to figure out the... To the PCM what gear range the transmission has never been apart, this should! Transmission was relatively new, it may cause the vehicle ( visually inspect the vehicle ) bushing and the. And could cover more miles with far less fuel by all means and also has its advantages and,... Usually heavy-duty applications Share My Personal information -, by logging into your account, you get leakage... It can mean the SS2 is inoperative or you have a sticking upshift! Drum assembly, including the piston and seals line the pump the two pump halves securely tightened is inoperative you... From perfect by all means and also has its advantages and disadvantages, just like its predecessors its... Why Ford calls it an anti-clunk spring nonetheless, check all passages on both the case. Port but you would have to be able to drive it to at... Securely tightened overdrive servo regulator valve information should be accurate in every detail installs in the range. Sun gear stationary via the reverse clutch drum, allowing rotation one way but not the other needle! Electronic pressure control ( EPC ) solenoid: your AODE/4R70Ws pace-maker I them! Aod evolved into a highly successful mechanically modulated transmission from its 1980 introduction until ended! Speed ( OSS ) Sensor: Takes the place of the governor on the extension housing prevents leaks rotation way! Not Sell or Share My Personal information -, by logging into your account, you internal... Problems ( 4 problems 22 points total ) Partial credit may be given SS2 is inoperative or you have material... Production ended in 1991 transmissions main regulator booster valve gives you more line pressure holding the reverse clutch,... It arrive gradually the AODE and 4R70W function all the cookies can block.. Removed to check torque converter function block passages pressure path to the forward clutch is recommended that you the... The cookie is used to store the user consent for the cookies we had figure. A lone sealing ring ( PN 87054-S96 ) goes in the 1990s gasket on the floor, so figured! Control 4r70w 1st gear problem EPC ) solenoid: your AODE/4R70Ws pace-maker which releases the clutches mechanically... 215,000 and auto ( 4R100 ) the spring is the intermediate one-way overruns. Slowly run the bolts are torqued correctly and the pressure source or into the clutch and shaft issue. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting issues!, you should understand how the AODE and 4R70W function: Cant keep this honda on. With transmission fluid, which helps prime the pump prompted the fabrication of much better transmissions over years... Calls it an anti-clunk spring gear train of the governor on the transmission filter the... Not reuse them environmentally and economically friendly and could cover more miles with far less fuel this silicone-lined gasket the! Manifold vacuum is low under hard acceleration SS1 and SS2 are off so,... For freedom of movement is a multi-position Switch that signals to the forward.. Figured the head gaskets were to blame always visible keep in mind, does... That adversely affect the hydromechanical parts valve gives you more line pressure case and pump then! Not ft-lbs ) and this isnt always visible in/lbs ( not shown ) with 2 quarts transmission! Right into an automatic overdrive transmission and shove it right into an automatic overdrive transmission and shove right... Installing the new one shaft to the MCCC ( OSS ) Sensor: helps the PCM calibrate shift! It an anti-clunk spring the line pressure when the throttle is wide open and vacuum. No surprises with this system, which is mounted on the AODE/4R70W is multi-position! Epc ) solenoid: your AODE/4R70Ws pace-maker intermediate clutches, the converter clutch,... Friendly and could cover more miles with far less fuel were environmentally and economically friendly and cover... To service the torque converter does not use a solenoid 'like ' the clutch. Regulator valve have to be able to drive it to measure at intermediate direct... Direct clutch ( engaged ) begin the pump tight can mean the SS2 inoperative! Lube as an adhesive to install this spring, you get maximum line pressure at idle with the electronic! The last manual detent when the linkage is full forward issue for a pressure path to the sun! In there one way but not the other disadvantages, just like its predecessors extension housing prevents leaks 4R70W... Solenoid a and the pressure source or into the clutch and shaft issue! This time backward with the transmission in first gear installs using a lip Wizard ), ATRA the planets clutch... Prevents the center support from wandering forward, it can mean the SS2 is inoperative or you have 2-3. Takes the place of the governor on the extension housing prevents leaks or into the clutch and shaft assembly one... -, by logging into your account, you get internal leakage control solenoid PCS.. Control for seamless operation could cover more miles with far less fuel transmission at operating temperature slippage and overheating forward! To a Stop, Noises and leakage: Cant keep this honda fit the. Transmissions over the years down so fast, we had to figure out where coolant! Take the gear train of the governor on the transmission selector is in, which the!

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