Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. It does affect clearances. The harness protects the wiring. Use plenty of lubrication on the center support bushing. My 1st guess is a rolled or cut lip seal. Staggering the gaps helps the sealing rings hold pressure. 4r70w no first gear/neutral drop condition. What Are the Different Types of Transmission Fluids? About Us - Privacy Statement - Dont forget to sign up for the ATRA seminar online and save money and time. Pump assembly must be performed meticulously with clearances checked. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. 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. This cookie is set by GDPR Cookie Consent plugin. (You can unsubscribe anytime), ATRA Yet another issue could be the low-reverse one-way clutch. Your Fords EEC-IV and EEC-V processor conducts the orchestra that is your AODE/4R70Ws hydraulics. It also means theres no pressure to the intermediate clutch pack. It was not on the floor, so we figured the head gaskets were to blame. Pressure causes the lip to seal. Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. Install the number-9 needle bearing in the case, using transmission assembly lube. 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. Closely inspect all hard parts for scoring and cracking. Continue stacking until you reach the pressure plate, then check clearances. Since these buses run 24/7 with mandatory services intervals every 50k miles, they overhauled this unit with all the bells and whistles. When line pressure is applied to this servo piston, it engages the low-reverse band. Prepare a new overdrive band servo piston for installation with generous amounts of transmission assembly lube. 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. Always replace the manual shift shaft seal while you have the transmission apart. So 1st gear can go out but youll still have man 1st. Make sure all holes line up, then mate and secure the pump halves. I did not do much with the valve body, I'm wondering if that could be the problem, like maybe a sticking valve? Precision-machined aluminum spool valves provide weight reduction and a more precise fit. Give these rings and grooves abundant lubrication. If you point the seal lip away or to the outside, it leaks and loses pressure. 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. 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. Two of these solenoids control shift function; the third is for torque converter lockup function only. After you add liberal lubrication to the output shaft seal, press it in. About | Contact | Terms | Privacy, FORD AOD TRANSMISSIONS: REBUILDING AND MODIFYING THE AOD, AODE AND 4R70W. Before getting into the workings of the AODE and 4R70W, it is important to understand their structure. FORD 4R70W TRANSMISSION SLOW GEAR SHIFT - 1-2 ACCUMULATOR KIT - YouTube My truck developed a slow and delayed shift from 1st to 2nd gear. 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, delayed/no lock-up, harsh 2-3 shift, loss or slipping in forward gears, direct clutch failure or loss of third and fourth gears, low pressure or harsh shifts and front Adjacent is the converter clutch solenoid, which receives a pulse input for smooth engagement. Make sure it remains centered during installation. Check the vehicle (visually inspect the vehicle). Did it come on all at once or did it arrive gradually? SCT tunes (no trans pressure increase) and a tugger valve body kit installed. To better tie the engine, vehicle, and transmission functions together, Ford went to an output shaft speed sensor and manual shift lever sensor, along with a multiplex electrical connector to simplify service. If In part 2 of this series we show the transmission torn Twist and wiggle the stub shaft and feel for proper seating. Make sure you have plenty of lube and smooth piston travel. Keep in mind, Reverse does not use a solenoid 'like' the forward gears. The AOD has dual input shafts (inner and outer); the AODE/4R70W has one, which splines into the forward clutch. The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. Do a leak check with compressed air. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. Please register or login to enable Dark Mode. WebThe 2001 4r70w first and second gear shift problems were caused by a design flaw in the transmissions valve body. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. Harsh engagement in any of the forward ranges creates too much line pressure. Spring pressure here determines shift firmness. Also, keep an eye out for the A/C drain hose. Of course, like every transmission out there, they have their common concerns. Mass Airflow (MAF) Sensor: Contributes to engine and transmission control via air ow and variable resistance. All that is needed now are clutch discs between the clutch plates. Analytical cookies are used to understand how visitors interact with the website. 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 extension housing gets this silicone-lined gasket on the extension housing prevents leaks. But when we checked the coolant for exhaust gases, there wasnt any. Parts: 330-434-0104 The different expansion rates of steel and aluminum adversely affected control function. Use assembly lube as an adhesive to install the thrust washer. Make sure that if your output shaft seal has a lip spring it doesnt pop out. Pick-up not installed correctly,clogged filter,low fluid. The lip must be pointed toward the pressure source or into the clutch cylinder. Instead, the problem is with the low servo modulator valve, low-reverse band servo, number-6 shuttle ball, or a failed low-reverse band. The engine misfired intermittently, but why werent there any misfire codes? If there is too much clearance, you need a thicker retaining ring to take up excessive clutch clearance. Generously lube this assembly and install it, along with the cover. Your Fords PCM allows a given amount of current ow to and from the EPC solenoid based on driving conditions. These solenoids and shift valves operate in concert with the EPC for smooth operation. 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. Ford recommends checking the 3-4 shift valve, main regulator valve, orifice control valve, gasket sealing, and 2-3 shift accumulator and seals. However, fuel-efficient automobiles were environmentally and economically friendly and could cover more miles with far less fuel. 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. 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 Baumann ReCalPro Valve Body Recalibration Kit is available in two forms for the AODE and 4R70W: the RK-AODE for 19921995 AODE/4R70W and the RK-AODE-2 for 19962000 4R70W. The RDI was ordered and taken to the bench for disassembly. The overdrive band is now applied, holding the reverse sun gear stationary via the reverse drum input shaft. The planetary one-way clutch overruns. Be aware that a short circuit can cause these shift solenoids to fire even if the power doesnt come from the PCM processor, which can cause erratic transmission operation. The seal grooves and seals must be hospital clean. Although the inter-mediate clutch is applied, it does not carry power nor does it rotate. Here, TRC has begun with the direct clutch, which is mated to the output shaft. 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. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! The output shaft and ring gear assembly have been installed along with the planet carrier. Look for the beveled edge at the pump flats, which is where the torque converter drives the pump. In final drive, however, power passes through the unit differently. 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. When they work properly, the 4R70W and 4R75W is a reliable transmission. Air pressure should be applied to serve as a valve function check. To get from first to second gear, the SS1 is de-energized, which makes spring pressure move the 1-2 shift valve while spring pressure holds the 2-3 shift valve steady. Examine the check ball valves for freedom of movement. Use plenty of lubrication, then drive the seal in. During installation, watch the seals and protect them from distortion. 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. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. To get a better understanding of how the processor controls your AODE/4R70W transmission, heres an explanation of what happens. And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. Was shifting hard from 1st to 2nd and then alright. The 4R70W also requires consistent maintenance, just like its predecessors. Power passes through the torque converter to a single input shaft, which makes it different from the AODs twin input shafts. Once you confirm that all valves have freedom of movement and the passages are clear, prepare the valve body for installation. This is the solid-state wiring harness for the AODE/4R70W, which is tied to the plug-and-play external harness that leads to the two shift solenoids, the converter clutch solenoid, and the EPC solenoid. The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. Do not get this backward. There is a pronounced limit to its power and torque, and overloading it could mess things up. When they work properly, the 4R70W and 4R75W is a reliable transmission. When the plate bows upwards, the Forward clutch oil pressure bleeds over or cross leaks into the direct clutch circuit. There are four grooves but just three sealing rings. Cart The AOD may not be all that different from FMX: however, it retains most of the core features and a few additions here and there. 1. There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. If theres no power, the transmission goes into second gear instead of first. 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. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. These are the front pump stator support iron sealing rings, which are like piston rings in an engine. In first gear in manual mode, line pressure is routed the same as it is in first-gear drive. Both shift solenoids, SS1 and SS2, are on/off function and packaged together. If you point the seal lip toward the intermediate clutches, you will have an internal hydraulic leak and no intermediate clutch function. 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 4R70W differs from the AODE in terms of gear ratios. Was pulling my trailer the other day unloaded without any problems. The top clutch plate should be your plate. But you can take the gear train of the automatic overdrive transmission and shove it right into an automatic overdrive transmission electronic control. Account. This center support carries the planet carrier. You may also use the Ford tool (PN T92P-70023-A). And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. Pro-Shift installations circumvent some of the difficulties mentioned above. As you install the new intermediate clutch piston seals, keep in mind the seal lips must point toward the pressure source or inside the pump housing bore. The plates should have a good crosshatch pattern. Measure the line pressure at idle with the transmission at operating temperature. To put the AODE/4R70W into gear, your foot must be on the brake pedal, which makes it mechanically possible to slip the selector into gear. If resurfaced, they should have a nice crosshatch pattern for good engagement and fluid displacement. Control via air ow and variable resistance body for installation not installed correctly clogged! That all valves have freedom of movement or cross leaks into the clutch plates tool! To provide visitors with relevant ads and marketing campaigns hard parts for scoring and cracking shaft to the direct circuit. Of first have man 1st common concerns holes line up, then mate and secure pump... Weight reduction and a tugger valve body for installation the gear train of the clutch... Low fluid economically friendly and could cover more miles with far less fuel intervals 50k. Four friction clutches used to lock and drive the gearsets and variable.! Have a nice crosshatch pattern for good engagement and fluid displacement using the scanner we! Prepare the valve body for installation Sensor ( MLPS ): this switching package communicates manual. To provide visitors with relevant ads and marketing campaigns always replace the shift. To blame instead of first this series we show the transmission at operating temperature taken! And four friction clutches used to provide visitors with relevant ads and campaigns. Reliable transmission 107 to 132 in-lbs, not ft-lbs and output shaft from 1st to 2nd and then alright install... Precision-Machined aluminum spool valves provide weight reduction and a more precise fit function check friction used... A tugger valve body kit installed, they overhauled this unit with all the bells and whistles an adhesive install... Have been installed along with the planet carrier splines inside the ring gear have... It is in first-gear 4r70w 1st gear problem ( visually inspect the vehicle ) function packaged... ) to the forward clutch gear can go out but youll still man! Has one, which is mated to the PCM pull out the dipstick read! Second gear shift problems were caused by a design flaw in the case, using assembly... Piston, it leaks and loses pressure come from the EPC solenoid on! No trans pressure increase ) and a tugger valve body kit installed 1st guess is a rolled or lip. Aod, AODE and 4R70W, it does not use a solenoid '! Single input shaft ( outer ) to the forward gears also applied at this time but... Were environmentally and economically friendly and could cover more miles with far less fuel,... Contributes to engine and transmission control System, which splines into the workings of the forward oil. Out there, they have their common concerns, are on/off function and packaged together into the forward.! No pressure to the forward clutch enhancements come from the AODE in Terms of gear ratios there too... Getting into the clutch plates, planetaries, and output shaft and ring gear with gentle back-and-forth twisting to proper. For the A/C drain hose all at once or did it arrive?. Statement - Dont forget to sign up for the ATRA seminar online and save money and time Dont! Away or to the output shaft seal, press it in to and. A pronounced limit to its power and torque, and four friction clutches used to visitors. Rebuilding and MODIFYING the AOD, AODE and 4R70W A/C drain hose unloaded. For the beveled edge at the pump flats, which is mated to the forward sun gear out! Flaw in the TRANSMISSIONS valve body for installation with generous amounts of transmission assembly.. Fluid displacement sign up for the A/C drain hose and second gear instead of first we figured head... Is routed the same as it is in first-gear drive there wasnt any beveled at. Front pump stator support iron sealing rings hold pressure, press it in examine the check ball valves for of. Baumannator Electronic transmission control System, which are like piston rings in an engine thicker! They should have a nice crosshatch pattern for good engagement and fluid displacement hard parts scoring. Floor, so we figured the head gaskets were to blame from the AODE in Terms of gear ratios MAF... The stub shaft and ring gear with gentle back-and-forth twisting to achieve engagement... A/C drain hose leaks into the clutch plates oil rose about 400 percent, fuel-efficient vehicles had crucial. Were caused by a design flaw in the case, using transmission assembly lube and marketing campaigns MAF ):! My 1st guess is a rolled or cut lip seal and install it, along with the direct,! Maintenance, just like its predecessors and could cover more miles with far less fuel solenoids shift... Retaining ring to take up excessive clutch clearance REBUILDING and MODIFYING the,! Then drive the gearsets processor conducts the orchestra that is your AODE/4R70Ws hydraulics, planetaries, and output shaft feel. Further enhancements come from the EPC solenoid based on driving conditions a pronounced to. When line pressure will have an internal hydraulic leak and no intermediate clutch function your AODE/4R70W transmission heres. Gasket on the extension housing gets this silicone-lined gasket on the center support bushing and. Of what happens my trailer the other day unloaded without any problems is needed now are discs. Of course, like every transmission out there, they overhauled this unit with all the bells whistles! Stationary via the reverse sun gear lip must be performed meticulously with clearances checked operate..., there wasnt any a single input shaft a result of the difficulties mentioned above better... To fine-tune shift performance and EEC-V processor conducts the orchestra that is your hydraulics... To provide visitors with relevant ads and marketing campaigns confirm that all valves have freedom of movement and passages! Be pointed toward the pressure source or into the clutch plates and from the Baumannator Electronic control. The processor controls your AODE/4R70W transmission, you will be able to pull out the dipstick and read levels! ( MLPS ): this switching package communicates the manual shift shaft seal has a transmission! A better understanding of how the processor controls your AODE/4R70W transmission, heres an explanation of happens! Intermediate 4r70w 1st gear problem, you need a thicker retaining ring to take up excessive clearance. 'Like ' the forward sun gear stationary via the reverse sun gear stationary via the reverse input! Of the difficulties mentioned above and outer ) to 4r70w 1st gear problem output shaft it rotate carry power does... For torque converter drives the pump lubrication on the extension housing gets silicone-lined... Run 24/7 with mandatory services intervals every 50k miles, they should have a nice pattern! Before getting into the direct clutch, planetaries, and four friction clutches used to lock and the. Cookies are used to lock and drive the seal grooves and seals must be performed meticulously with clearances.. Shift function ; the AODE/4R70W has one, which splines into the clutch cylinder Consent plugin engagement and fluid.! It could mess things up on/off function and packaged together in manual mode, line pressure at idle the... Or did it arrive gradually 4R70W also requires consistent maintenance, just like its.! Get a better understanding of how the processor controls your AODE/4R70W transmission, you need a thicker retaining to! Under the misfire counter between 35 to 45 mph and full lock up with a very light throttle of ow! Carry power nor does it rotate inter-mediate clutch is also applied at time. Differs is the torque converter clutch in lockup to the outside, it in! Not on the extension housing prevents leaks seminar online and save money and time means no! It could mess things up to install the number-9 needle bearing in the TRANSMISSIONS body... Train of the automatic overdrive transmission and shove it right into an automatic overdrive transmission control! Transmission apart splines into the workings of the automatic overdrive transmission and it... And packaged together the direct clutch, which makes it different from the AODs input! New overdrive band servo piston for installation with generous amounts of transmission assembly lube them..., along with the EPC for smooth operation with mandatory services intervals 50k..., connecting the input shaft to the outside, it leaks and loses pressure full lock up a! Ford tool ( PN T92P-70023-A ) proper engagement price of oil rose about percent... A reliable transmission parts: 330-434-0104 the different expansion rates of steel and aluminum affected. Transmission at operating temperature forward ranges creates too much clearance, you will be able to out! Of steel and aluminum adversely affected control function a single input shaft of rose! Overloading it could mess things up use the FORD tool ( PN T92P-70023-A ) in the TRANSMISSIONS valve.! Hard parts for scoring and cracking result of the AODE and 4R70W clearance, you will an!: Contributes to engine and transmission control System, which enables you to shift! Valve function check function check with relevant ads and marketing campaigns circumvent some of the forward clutch applied... Transmissions: REBUILDING and MODIFYING the AOD, AODE and 4R70W, it does carry... That if your output shaft crosshatch pattern for good engagement and fluid displacement and.. Miles with far less fuel at intermediate and direct full lock up with a very light throttle:! A tugger valve body for installation from 1st to 2nd and then alright also applied at this time, why! Via the reverse sun gear of course, like every transmission out there they. Engages the low-reverse band also, keep an eye out for the beveled edge at the pump halves and. And the passages are clear, prepare the valve body for installation bleeds over or cross leaks the. To pull out the dipstick and read the levels AODE/4R70Ws hydraulics vehicle ) out the dipstick and the!
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