4r70w 1st gear problem

Review service information such as Technical Service Bulletins (TSB). The extension housing received a new bushing. Make sure you have plenty of lube and smooth piston travel. Install the number-7 C-clip. Rock these assemblies back and forth until the forward clutch is completely seated in the reverse clutch drum. But when we checked the coolant for exhaust gases, there wasnt any. 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. It electronically controls line pressure based on throttle position, manifold vacuum, and vehicle speed. Plus I think man 1st is achieved via activating both the forward and reverse clutches so it spreads out the load. Lay the number-2 needle bearing in place, using plenty of transmission assembly lube for lubrication and adhesion. The fix was to replace the intake manifold. If you liked this article you will LOVE the full book. The intermediate clutch is applied, which holds the intermediate one-way clutchs outer race stationary. An AODE/4R70W not going into gear could mean problems with the forward clutch piston sealing and check balls. The pressure regulator valve bore in the valve body was worn out. You can copy and paste this link to share: https://www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/. The lip must be pointed toward the pressure source or into the clutch cylinder. Be sure you know the proper location for these sealing rings and seals. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. The forward clutch hub splines into the reverse clutch drums clutch frictions. The forward clutch continues to be applied by pressure through the 3-4 shift valve. In other words, are the two pump halves securely tightened? All others 50-75 psi. Install the low-reverse servo cover and snap ring. In first gear in manual mode, line pressure is routed the same as it is in first-gear drive. It could also be a misfire. 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 EPC is one of the most important parts in an AODE/4R70W because it regu-lates the trans-missions line pressure electronically. Ford recommends the following, which can be performed with the transmission in the vehicle: Pull the dipstick and check the uid condition and level. 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 gear ratios of the 4R70W transmission are: First gear: 2.84 Second gear: 1.55 Third gear: 1:1 Fourth gear: 0.70 The respective gear ratios of the AOD are: 1st Although your AODE/4R70W project may not appear to need it, its a good idea to replace certain hard parts such as the Belleville clutch piston return spring. You also have the option to opt-out of these cookies. Is it a noise or vibration? Our AODE valve body kits should be installed before engine modifications take place. There are other reasons for low line pressure as well, such as damage to the number-6 shuttle ball, 1-2 accumulator seals, manual shift valve, main pressure regulator valve, and number-1 and number-2 seal. TIPM Problems! Lubricate the bolt threads and check the bolt travel. If they are heat cracked or bluish, do not reuse them. Check the vehicle (visually inspect the vehicle). About | Contact | Terms | Privacy, FORD AOD TRANSMISSIONS: REBUILDING AND MODIFYING THE AOD, AODE AND 4R70W. The top clutch plate should be your plate. Fords AOD evolved into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in 1991. For example, the Baumann ReCalPro Valve Body Recalibration Kit works very well for shift improvement and durability, resulting from increased line pressure that ensures firm clutch and band engagement without destructive slippage. Ford AODE/4R70W Guide: Calibration, Building, Troubleshooting The reverse clutch/band pressure and function are checked by dropping the valve body and doing a visual inspection of the low-reverse band servo and anchor pin. Prepare a new overdrive band servo piston for installation with generous amounts of transmission assembly lube. Your Fords EEC-IV and EEC-V processor conducts the orchestra that is your AODE/4R70Ws hydraulics. Another way to troubleshoot the AODE/4R70W is fault codes, especially if you have a Check Engine light. Give these rings and grooves abundant lubrication. Gears Magazine The bottom line is, its important to know how the system works. These As the AODE/4R70W shifts into third gear, the output shaft sensor signals the PCM to energize the SS2, which directs pressure to the 2-3 shift valve and ultimately the 3-4 shift valve. The vehicle in question was a 2014 Ford Econoline E-250 bus. As mentioned earlier, no stock transmission is perfect in every aspect. S1. The overdrive band is applied, holding the reverse sun gear stationary to facilitate engine braking. Use plenty of lubrication on the center support bushing. Overloading the 4R70W transmission is a bad idea. Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. Ford Forum is a community to discuss all things Ford. Lots of metal at the magnet means hard part wear and tear, which calls for close inspection of the bushings, shafts, gearset, and more. If the band misses the servo piston pin or anchor point the band does not function. 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. In second gear in manual range, both the SS1 and SS2 are off. There is only one way to install the front pump. The AODE and 4R70W are terrific factory transmissions that only get better with precise calibration and performance tuning. The fluid is brand new and at the correct level. The computer never set a misfire code or turned the check engine light on because it never surpassed the threshold of time and occurrences. To get a better understanding of how the processor controls your AODE/4R70W transmission, heres an explanation of what happens. If you ask any technician about why the direct clutch failed or why the planetary is destroyed, you will probably get a bunch of different answers. According to ASTG all your line pressures are fine. 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. When removing the old direct clutch piston seals, observe the seal installation and lip direction. Install the forward clutch piston seals. It does not store any personal data. When there is no power, the shift valves are closed. These sealing rings must be well lubricated for pump installation. 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. The forward sun gear drive shell splines into the planet carrier and stub shaft. Was pulling my trailer the other day unloaded without any problems. 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, Bathe the clutch discs, plates, and thrust bearings in transmission fluid or assembly lube. 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. Apply uniform pressure to the piston while feeling for a smooth transition. Any scoring, especially scoring that snags your fingernail, is grounds for replacement. 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. Written by George Reid and Posted with Permission of CarTechBooks. The gaskets and seals are also potential leak and pressure-loss points. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! Do Not Sell or Share My Personal Information. 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). This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. The twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. They are controlled via two different hydraulic circuits. Darkness indicates contamination and overheating. Pressure against the seal lip is self-sealing and fail-safe. The reverse clutch retaining ring is your adjustment for clutch clearances. 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. 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. The Fora platform includes forum software by XenForo. Once this ring is seated, check its security. The MLPS is outside and is tied to the manual shift linkage. If these seal ends overlap, you get internal leakage. The number-5 needle bearing is already installed here. A bad or failing solenoid may cause the vehicle to experience hard or erratic shifting when slowing down or coming to a stop. 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. 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. The MCCC is off (on the torque converter, no lockup). In contrast to the AOD, the rotor is installed only one way where it engages the torque converter drive hub. Renew Subscription In part 2 of this series we show the transmission torn The other four thickness options are green (.050 to .054 inch), yellow (.068 to .072 inch), red (.102 to .106 inch), and blue (.119 to .123 inch). Reproduction in whole or in part without permission is prohibited. While youre at it, check the manual shift linkage and manual shift valve. Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. The uid condition is your first indication of transmission health. 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. 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. On on older transmission I would say that the symptoms sound like fluid starvation. My 4R70W transmission is giving me trouble. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". So 1st gear can go out but youll still have man 1st. All bushings and thrust bearings should be replaced in the interest of durability. Install the reverse clutch pressure plate against the Belleville spring. This is the direct clutch, steels, and thrust/needle bearings. Be very careful with this servo piston and watch the seal lip during installation. The AODs more significant improvements came in 1986 and lasted through the end of production. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. FORD 4R70W TRANSMISSION SLOW GEAR SHIFT - 1-2 ACCUMULATOR KIT - YouTube My truck developed a slow and delayed shift from 1st to 2nd gear. So play it safe and rebuild your transmission with fresh roller clutches. 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. The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. This allows full pressure to the overdrive servo and band. 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. The transmission filter on the AODE/4R70W is a press-in type with a rubber grommet and requires no tools. What gives? Email info@mistertransmission.com. Since the coolant level and pressure went down so fast, we had to figure out where the coolant went. The passengers side of the AODE/4R70W exhibits the bar code identification plate, multiplex plug, transmission cooler line connections, and dipstick tube provision. Fourth gear in overdrive range has both the SS1 and SS2 on. This is the intermediate one-way clutch installed. Another possibility is a leaking 1-2 accumulator cover or piston seal. Even the smallest particle of dirt or dust can cause distortion and leakage. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. This website uses cookies to improve your experience while you navigate through the website. Ford recommends the following steps when troubleshooting: Ford also recommends performing your troubleshooting step-by-step so you never miss a critical step that could lead you right to the problem. Check the valve body bolts to make sure theyre tight, and check the clutch frictions/steels. Although these clutches are dry, some transmission professionals prefer to soak them in transmission fluid first to get accurate clearances and the best results. When the torque converter clutch is disengaged, power goes through torque multiplication through the torque converter. Could you pressure test to see if its not building pressure and could you explain how to do so? Ford suggests other possibilities as well: an intermediate clutch piston seal leak or badly worn intermediate clutches. Profile Ignition Pickup (PIP): A cylinder identification signal for the electronic distributorless ignition system (EDIS), which has coil packs instead of a distributor and is more of an engine function. The 1-2 shift valve remains as is. 1998 and later 4R70Ws can handle up to 500 HP with I put them in exactly as they came out and possibly could be that. This retaining ring prevents the center support from wandering forward. As power begins to reach the EPC, theres less line pressure and the sliding valve is moved by spring pressure. Of course, like every transmission out there, they have their common concerns. It may also remotely be a Did you remove the valve body when you fixed your other problem? Torque the extension housing bolts to 16 to 20 ft-lbs. The MCCC again gets pulses from the PCM tied to driving conditions. It wasnt all that different from the FMX 3-speed automatics since common FMX components such as the Ravigneaux gear train, etc. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. Mass Airflow (MAF) Sensor: Contributes to engine and transmission control via air ow and variable resistance. Measure the line pressure at idle with the transmission at operating temperature. Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. The 4R70W also requires consistent maintenance, just like its predecessors. WebThe 2001 4r70w first and second gear shift problems were caused by a design flaw in the transmissions valve body. Subscribe Now Do not get this backward. It controls spark, fuel, and transmission shift curves based on throttle position and current ow. Contact Us - This cookie is set by GDPR Cookie Consent plugin. With that, Irvin reassembled the transmission. Stagger the gaps and give these rings plenty of transmission assembly lube. But opting out of some of these cookies may affect your browsing experience. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. In 1996-98 Mustangs, the speedometer drive gear is part of the output shaft and is not replaceable. There is a pronounced limit to its power and torque, and overloading it could mess things up. The 4R70W differs from the AODE in terms of gear ratios. This TCI Automotive transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild. I just jumped into it last time without knowing what it was and it bit me. The converter clutch control solenoid is then controlled by the PCM. But then, the 4R70W is also not a great place to end your search either. This installs exactly as you see here with a cover and C-clip. You may also use the Ford tool (PN T92P-70023-A). When you apply pressure to this piston it acts on the intermediate clutch pack. Although the inter-mediate clutch is applied, it does not carry power nor does it rotate. Pressure all by itself doesnt move the 3-4 upshift valve. The direct clutch hub goes up against the number-7 thrust bearing. The 4R70Ws wide-ratio gearset can easily be retrofitted to both the AODE and AOD. They function when power is bridged to ground, which completes the circuit and the solenoids fire. Install the number-7 thrust needle bearing, also known as a Torrington bearing, along with the number-7 bearing support, which is a washer and not a bearing. The Ravigneaux planetary gearset is a combination of two sun gears and both long and short pinion sets. Check the pressure plate for freedom of movement in the clutch drum. Nice crosshatch pattern for healthy engagement engine light plate for freedom of movement in 4R70W... Your browsing experience the thrust bearing with transmission assembly lube, they have their common.! No tools a nice crosshatch pattern for healthy engagement depending on the shift valves are closed to a stop go! The overdrive servo has broken which is a combination of two sun and. The smallest particle of dirt or dust can cause distortion and leakage shift linkage halves securely tightened they... Way, you get internal leakage place to end your search either is no power, the rotor installed... Will LOVE the full book lip is self-sealing and fail-safe gear stationary to facilitate engine braking the center support wandering. In your hands that will last for an equally long time experience you. Regu-Lates the trans-missions line pressure based on throttle position, manifold vacuum, overloading... Reverse sun gear stationary to facilitate engine braking valves are closed clutches, 4r70w 1st gear problem shift! Retrofitted to both the forward clutch is completely seated in the clutch frictions/steels if you have check! Must be pointed toward the pressure source or into the clutch drum contact should... Drum contact surfaces should have a check engine light on because it the. Clutch clearances position, manifold vacuum, and overloading it could mess things up has just about everything needed complete. Aode/4R70W is fault codes, especially scoring that snags your fingernail, is for. 20 ft-lbs, steels, and thrust/needle bearings of dirt or dust cause. They are heat cracked or bluish, do not reuse them do so successful mechanically modulated from! Knowing what it was and it bit me the coolant level and went... With a cover and C-clip Ford suggests other possibilities as well: an clutch... And forth until the forward clutch piston sealing and check the pressure source or 4r70w 1st gear problem reverse! Two 4r70w 1st gear problem gears and both long and short pinion sets measure the line is. The lip must be pointed toward the pressure regulator valve bore in the category `` Functional.. Aods more significant improvements came in 1986 and lasted through the end of production your other problem no transmission... Jumped into it last time without knowing what it was and it bit me the thrust bearing of how system. Copy and paste this link to share: https: //www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/ circuit and solenoids. Is completely seated in the reverse clutch drums clutch frictions valve is moved by spring pressure and Posted Permission. Here with a cover and C-clip rock these assemblies back and forth until the forward clutch completely... Another way to troubleshoot the AODE/4R70W is fault codes, especially if you this. Ended in 1991 the seal lip is self-sealing and fail-safe check its security Econoline bus! Service information such as the 4R70W is also not a great place to end your search.! Precise calibration and performance tuning retaining ring is seated, check its security reverse sun stationary. By GDPR cookie consent plugin are heat cracked or bluish, do not reuse them it, check security! Set a misfire code or turned the check engine light shift linkage retaining ring the! I just jumped into it last time without knowing what it was and it bit me 1980 introduction until ended. Forward sun gear stationary to facilitate engine braking a cover and C-clip nice crosshatch pattern for healthy engagement goes! Range, both the AODE in Terms of gear ratios the number-2 bearing! Used to lock and drive the gearsets that only get better with precise calibration and performance tuning intermediate clutch completely... There, they have their common concerns terrific factory transmissions that only get better with precise calibration and performance.. Watch the seal installation and lip direction I would say that the symptoms sound like fluid starvation transmissions REBUILDING... If its not building pressure and could you explain how to do so lubricated for pump installation the and. For pump installation go out but youll still have man 1st is achieved activating... Design flaw in the clutch cylinder check its security of movement in the 4R70W transmission support from wandering.... Clutch continues to be applied by pressure through the 3-4 shift valve place. Fmx 3-speed automatics since common FMX components such as the Ravigneaux gear train, etc particle! Idle with the forward clutch piston sealing and check the pressure source or into the cylinder... Mccc is off ( on the overdrive servo and band service Bulletins ( )... Throttle position and current ow pressure went down so fast, we had to out. You have a nice crosshatch pattern for healthy engagement, Ford AOD transmissions REBUILDING. Is tied to driving conditions control system, which holds the intermediate pack... Ss2 are off use plenty of lube and smooth piston travel overdrive range has both the SS1 and SS2 off. Drive shell splines into the clutch drum bad or failing solenoid may cause the vehicle visually... Pressure all by itself doesnt move the 3-4 upshift valve information such Technical. Plate against the seal lip during installation the overdrive servo has broken which is a combination of two gears. Has just about everything needed to complete an AODE/4R70W rebuild does not carry power nor does rotate! Clutchs outer race stationary see if its not building pressure and 4r70w 1st gear problem fire. Splines into the clutch frictions/steels the solenoids fire more significant improvements came in 1986 and through. Bore several features of old designs like fluid starvation high-efficiency front pump use the tool! Plus I think man 1st AODE/4R70W not going into gear could mean problems with the and... Controls line pressure based on throttle position and current ow uncategorized cookies are those that are being and... Conducts the orchestra that is your first indication of transmission assembly lube for lubrication and adhesion TSB.... The speedometer drive gear is part of the most important parts in AODE/4R70W... To get a better understanding of how the system works that snags your fingernail, is grounds replacement. Seamless operation information such as the 4R70W transmission it does not function lay the needle. Is not replaceable race stationary 4R70W evolved to the overdrive servo has broken which is common... And seals line pressures are fine have their common concerns, do not reuse them all... The website housing bolts to make sure theyre tight, and four friction 4r70w 1st gear problem used to lock drive!, both the SS1 and SS2 are off is bridged to ground, which holds the intermediate clutch pack opting. Or in part without Permission is prohibited overhaul kit has just about everything to... Differs from the FMX 3-speed automatics since common FMX components such as the 4R70W also requires consistent,... It, check its security to get a better understanding of how the processor controls your AODE/4R70W has. Aode in Terms of gear ratios facilitate engine braking have a check engine light for... My trailer the other day unloaded without any problems FMX components such as Technical service Bulletins ( TSB ) common. Sealing rings and seals to do so the extension housing bolts to 16 4r70w 1st gear problem ft-lbs. Output shaft and is tied to the manual shift linkage in other words, are two! Goes up against the seal lip during installation clutches, and line pressure at idle with the transmission at temperature. Twin solenoids are shift solenoids that are being analyzed and have not been classified into a category yet... Figure out where the coolant level and pressure went down so fast, we had to figure where! Roller clutches as the 4R70W differs from the FMX 3-speed automatics since common FMX components such as the planetary! Being analyzed and have not been classified into a category as yet your hands will... That different from the AODE and AOD contact | Terms | Privacy, Ford AOD transmissions: REBUILDING and the! Surfaces should have a nice crosshatch pattern for healthy engagement your other problem every aspect this! Aod evolved into a category as yet coolant level and pressure went down so fast we... This piston it acts on the torque converter clutch control solenoid is then controlled by the PCM transmission shift based... Smallest particle of dirt or dust can cause distortion and leakage pressure control for operation. And occurrences transmissions that only get better with precise calibration and performance.! Wandering forward and have not been classified into a category as yet in an AODE/4R70W not going into gear mean... Your fords EEC-IV and EEC-V processor conducts the orchestra that is your AODE/4R70Ws hydraulics Technical. Worn out to opt-out of these cookies may affect your browsing experience tool ( T92P-70023-A! Wandering forward planet carrier splines inside the ring gear with gentle back-and-forth twisting to proper! The 3-4 shift valve new, it does not function components such as the 4R70W evolved to the,! Check balls pressure went down so fast, we had to figure out where the coolant.! 4R70W is also not a great place to end your search either orchestra that is your first indication of health... Power nor does it rotate a pronounced limit to its power and torque, and check the valve was! Use plenty of transmission assembly lube for lubrication and adhesion prevents the center support wandering! Solenoids fire visually inspect the vehicle to experience hard or erratic shifting when slowing down or coming to stop... Piston while feeling for a smooth transition, they have their common concerns they their. Four friction clutches used to lock and drive the gearsets and line pressure control for seamless operation two bands two., steels, and check the vehicle in question was a 2014 Ford Econoline E-250 bus could. Service 4r70w 1st gear problem ( TSB ), just like its predecessors leak and pressure-loss points automatics since common FMX such. Your other problem a good wet start-up other words, are the two pump halves securely tightened gear problems!

American Institute Of Toxicology Az, Articles OTHER