Transmission Diagnostics & Repair

Transmission general data The automatic 4-speed transmission B7TA was designed by Honda specialists in 1996. It is intended for front-wheel drive Honda and Acura vehicles. This modification of automatic transmissions can be installed on 6-cylinder engines with the capacity not higher than 3.5 liters. In the process of operation this transmission made a good impression. Due to its simple design, this transmission is distinguished by its reliability and durability. The maintenance service for this transmission is not complicated. HONDA ODYSSEY 2.3L; V6 3.5L; Honda B7TA Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type4ATFWD7,12,9Honda Z-1 Technical issues and repair guidelines After running 50 thousand kilometers it is required to change the oil with a filtering element. The car owner can perform this procedure by himself even with a limited experience in this field. B7TA has no planetary gears that allowed engineers to simplify the design of this transmission. It had a positive impact on the level of durability and reliability of this automatic transmission. It is not unusual, when well-timed maintenance and proper usage helps this transmission to cover 400 thousand kilometers without major repairs. Transmission specialists recommend warming up of the oil in this transmission in winter. It can be done the following way: shift the selector lever to the Drive position and hold the brake pedal depressed for about 30 seconds. This measure will help to warm up the transmission oil and prolong the trouble-free operation of the transmission. It should be also kept in mind that immediate accelerations after the start of the movement and gear-shifting in the manual mode may be harmful for the transmission. The list of common problems with B7TA includes issues with rubber gaskets which lose their elasticity after running 100-150 thousand kilometers that leads to oil leakages. In this case the repair procedure lies in replacement of these gaskets. How to repair this transmission (Videos)B7TA Transmission - Honda Odyssey Instruction manuals and useful linksLink typeSourceDescriptionpdfdrive.google.comB7TA Manual

Transmission general data The 6-speed automatic transmission AB60F (-Е – for rear drive) or AS68RC for Dodge RAM of the class extra heavy duty, Aisin name TB-68LS. This transmission was produced by Aisin Co since October of 2007 and paired with the engine V8 (5.7 liters) for 4WD SUVs such as Land Cruiser, Tundra, Sequoia, Lexus LX570. This reliable 6-speed transmission with "invincible" design tested on rear-driven predecessors А760-960 and on 8-speed АА80Е released the year before (2006). The main competitive product of this transmission is ZF6HP32. Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type6ATRWD/AWD68011,84,6Toyota WS Technical issues and repair guidelines Electrical components in this transmission is extremely sensitive to the transmission fluid status. The oil change requires specific knowledge and experience. During the overhaul the following parts are ordered for reassembly:the kit of gaskets and seals as well as kit of frictions.Friction components in this transmission are not complex and serve reliably till the end of the transmission resource. Frictions are usually changed as a result of operation with worn-out rings, bushings and sealing. First of all the, clutch drum Forward (С1 gears 1-2-3-4) gets burnt. All overhauls of the AB60F unit still involve the torque converter repair with replacement of the lockup clutch, replacement of burnt clutch, replacement of the filter and full spare parts kit: seals and gaskets made of rubber and paper. The valve body design is similar to the valve body of the А960Е transmission and it should be expected that typical problems with electrical components may be the same (after the mileage higher than 200 thousand kilometers without timely change of the fluid and filter replacement) wear-out of channels of linear pressure solenoids. Aisin 6-speed transmissions also have the mode of regulated torque converter lockup slippery, but in contrast to 6НР26-32, here the lock device turns on much later (starting from the 3-rd gear) and have reduced impact on the friction. Almost all solenoids (in comparison with the valve body in А960) functionally remained unchanged, except for linear solenoids SLU, SLT, SL2 in some modifications. Dirt in ATF damages the valve body and solenoids, therefore cleaning of these components is usually planned as the first stage of the transmission maintenance. During the first years after the transmission release automakers usually modify valve bodies, replace solenoids and change settings of ECM program. Therefore, it is recommended to monitor software changes, which may solve some problems in shifting.Mud accumulation in the valve body and solenoids as well as wear-out of rings lead to lower pressure in the Forward drum that results in premature burning of frictions with steel disks (Forward-C1) and corresponding Forward pistons. How to repair this transmission (Videos)AB60 Toyota Tundra Valve Body Removal and InstallationToyota AB60E/F Power flowAB60 Valve Body Removal and InstallationAB60F, Code P0983 Instruction manuals and useful linksLink typeSourceDescriptionpdfwww.at-manuals.comSchemewebwww.at-manuals.comScheme AB60Ewebwww.at-manuals.comSolenoid application chartwebwww.at-manuals.comStall testpdfSonnaxValve Body AB60Epdfdrive.google.comAS68RC manual

Transmission general data The Allison 2000 series includes modifications 2100, 2200 and 2300. This type of transmission was designed for light commercial vehicles operating in sectors of transportation and public transport. These transmissions are equipped with a turbine-driven power take-off mechanism with the N-locking option, and with a parking brake. Transmissions of 2000 series may have up to 6 gears, including overdrive, and be equipped with an advanced electronic control system of the 5-th generation, which provides more efficient operation and more diagnostic capabilities. These transmissions are reliable and highly efficient and can transmit power equal up to 224 kW ( 300 HP) in modifications with narrow or wide ratio coverage. As a rule these transmissions are used for commercial vans, drop-side trucks with a manipulator and all kinds of special equipment with a load capacity up to 13.6 tons ( 3000 lb). These transmissions are installed on almost all brands of trucks, buses produced in Europe (except MAN), Korea, and China. The instantaneous connection between the engine and the gearbox ensure precise modes of operation regardless of the cargo condition and the road quality. Accurate gear shifting without interruptions of power ensures the best speed characteristics and fuel economy. Fully automatic transmission allows the driver to pay more attention the driving process that is more important in difficult and tedious road conditions. The transmission electronics can be programmed to prohibit the vehicle movement when the auxiliary equipment is used. Consequently, the auxiliary equipment will be inaccessible when the vehicle moves. This feature provides additional security in operation. Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type5AT8411410Allison TES 295 Technical issues and repair guidelines The main repair problems are related to the auxiliary power take-off equipment, torque dividers, and the main one – the cooling process or heat exchanger. Designers of these transmissions quite consciously reduced the transmission resource by means of cooling. There are 3 main problems related to valve bodies of Allison 1000/2000/2400: 1. Sticking E-shift. When the valve sticks TCM detects that the pressure sensor doesn’t change the status and sets the trouble code P0872- after that the gearbox switches to the failsafe mode. 2. F-trim valve sleeve. The inside diameter of the sleeve wears out, leading to the torque converter clutch surge and trouble code P0741 – indicating the torque converter clutch slipping. . When lock-up stops operating and the P0741 code sets, the torque converter can overheat the ATF, causing damage to the torque converter and rapid deterioration of the ATF. 3. Warped castings. Valve bodies for these transmissions do not have separator plate gaskets, therefore it is required that two halves of the valve body should be flat sanded for protection from cross leakages. In this case locating pins should be removed to flat sand the valve body. How to repair this transmission (Videos) fluid and filter changeAllison Transmission Assembly Instruction manuals and useful linksLink typeSourceDescriptionweball-trans.byIdentifying Allison 1000/2000/2400 Valve Bodies

Transmission general data The Powerglide is a two-speed automatic gearbox constructed by GM. This gearbox was mainly installed on Chevrolet vehicles (1950-1973) and on some Pontiac cars. The gearbox was uncomplicated and extremely reliable, that gained trust of customers. In spite of its old-fashioned construction Powerglide is still popular in drag racing (as well as in mud racing) because it is not complicated and robust. Technical issues and repair guidelines The Powerglide is a two-speed automatic gearbox constructed by GM. This gearbox was mainly installed on Chevrolet vehicles (1950-1973) and on some Pontiac cars. The gearbox was uncomplicated and extremely reliable, that gained trust of customers. In spite of its old-fashioned construction Powerglide is still popular in drag racing (as well as in mud racing) because it is not complicated and robust. How to repair this transmission (Videos)Powerglide Transmission CutawayLEARN TO REBUILD THE POWERGLIDE Instruction manuals and useful linksLink typeSourceDescriptionwebSonnaxUnderstanding & Overcoming the Powerglide Servo Pin Bias Effect

Transmission general data The FMX is a fully automatic 3-speed gearbox, ensuring automatic up-shifts and down-shifts via the 3-forward gear ratios. This gearbox also includes manual selection of first and second gears. It is reported that FMX combines in itself the best features of MX and FX modifications. Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type3ATRWD10,45Type F Technical issues and repair guidelines This is a hydraulically controlled RWD gearbox. In terms of design this unit is close to BW8 and BW12, but spare parts are not interchangeable. FMX consists of the following main components: torque converter, oil pump, input shaft, rear-clutch, front-clutch, compound planetary gear set, rear band, one-way clutch, rear support-oil distributor and parking gear, governor, output shaft, vacuum diaphragm, control valve body, front band. This automatic gearbox was used during 1968-81 in many Ford cars. How to repair this transmission (Videos)FMX Transmssion part 1FMX transmission part 2Rebuild the Ford FMX Transmission Instruction manuals and useful linksLink typeSourceDescriptionwebWikipediaFord FMXpdfforelpublishing.comDiagnosis and service FMX Transmission0makcotransmissionpartsScheme FMX

Transmission general data The 4-speed FWD automatic transmission U540E was designed by Aisin in 2000 on the basis of the famous A4LB-1, which went out of fashion by that time. The transmission A4LB-1 also was modified in 2002 and a new modification can be found on different cars worldwide. This automatic transmission has two names - U540E (according to Aisin Co), and Daihatsu gave different names to its sub-modifications: A4Q, A4P, A4L, A4G, ..., depending on the car model. The U540E was upgraded with several hydraulic control solenoids, the valve body and electrics, and the new filter for the valve body. Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type4ATFWD6,24Toyota Type T-IV Technical issues and repair guidelines This transmission is very reliable as the most of Aisin transmissions. For many years of operation, it only requires change of oil and filter replacement, however it can cover the distance of 150-200 thousand kilometers even with an old filter. For the overhaul of this carefully adjusted transmission, specialists usually order the repair kit of gaskets and seals, which is mainly needed for reassembly of contaminated valve body and replacement of worn out rings causing the burning of frictions. The kit of all friction clutches is usually ordered together with the repair kit. Frictions get burnt for various reasons, but one of the most popular ones is related to insufficient oil pressure, caused by: 1. worn-out teflon and rubber rings 2. dirty wedging valves of the valve body 3. dirty valves of solenoids 4. faulty electrics of the solenoid or wiring of solenoids 5. clogged filter This transmission can be rarely met in repair services, all spare parts for this transmission are considered to be rarity and there is no much statistics related to its repair. Instruction manuals and useful linksLink typeSourceDescriptionpdfalltranz.coScheme U540E

Transmission general data TOYOTA K410 / K411 / K41A / K41B / XA-10LN Aisin developed the “200” series (K210) of CVT transmissions in 2002. This gearbox was intended for cars with 1.0-1.3 liter engines. The K210 had been produced and installed on some Toyota cars for the domestic market of Japan before 2015. Nevertheless, this series was not very successful – the CVT was larger than initially planned; it turned out to be not very convenient for underhood space of small cars. Therefore, in 2004, Aisin started developing a new “400” series on the basis of the K210. The K410 modification was smaller in size, lighter weight, and had enhanced fuel economy in comparison with the “200” series. Toyota considered the K410 to be an ideal CVT solution for small cars with 1.0-1.3 liter engines. This transmission is still applied in numerous Toyota cars (including cars for the European market). Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type∞CVTFWD14585Aisin CVTF7004, Toyota 08886-02105 In October 2008, Aisin launched production of the CVT transmission named K41A. This transmission was designed on the basis of the K410 modification and was specifically intended for application on cars Toyota IQ. The main difference between these two transmissions lies in the fact the differential in K41A was moved forward (in contrast with K410). This measure made it possible to reduce the size of the CVT for installation on limited underhood space of Toyota IQ (with 1.0 liter engine). In April 2009, the CVT modification K41b was launched in production. The main peculiarity of this transmission is higher torque transmission capacity. Therefore, this gearbox could have been used for Toyota IQ with more powerful 1,3-liter engine. In October 2010, Aisin engineers came up with a new CVT solution for the “400” series – the modification K411. The main difference of the K411 transmission from the 410 version is a significant fuel economy, which is achieved by actuation of an active clutch, when starting a car, and thanks to a new control mechanism (flex start control). In 2007, Aisin produced a new modification of the K410 transmission, which was named as XA-10LN for external markets (not for Toyota cars). This CVT was successfully applied in Suzuki cars (Suzuki Splash and Suzuki Swift). These Suzuki models were sold in the domestic market of Japan. In the European automotive market, K410/K411 CVTs were installed only on Toyota IQ (K41a and K41b) and Toyota Verso-S/Subaru Trezia (K411). Cars equipped with CVTs K410 and K411 were not sold in the North America (USA and Canada). Cars with these transmissions are quite popular in Australia, New Zealand, and some countries of Southeast Asia. Typical problems Typical problems which occur in this range of CVT transmissions include the following: 1) ATF contamination 2) K410/K411 CVTs often get overheated (especially in winter time) 3) Damage of bearings 4) Seal Clutch leakages Which cars run with this gearbox?BrandModelYearTypeEngineMazdaDEMIO07-14CVT FWDL4 1.3L 1.5LSubaruTREZIA12-13CVT F/4WDL4 1.5LSuzukiSPLASH08-14CVT FWDL4 1.2LToyotaIST07-16CVT F/4WDL4 1.5LToyotaPORTE11CVT FWDL4 1.5LToyotaRACTIS06-13CVT FWDL4 1.5LToyotaSIENTA03-15CVT FWDL4 1.5LToyotaVITZ05-16CVT FWDL4 1.5L

Transmission general data The CVT transmission VT20E was used for FWD Opel Vectra of English and German assembly with engine capacity equal to 1.8 liters. The VT25E modification found application in American FWD Saturn VUE and Ion (2.2 liters capacity). This CVT equipped with a push belt is perfectly adjusted, therefore it rarely gets in repair services. During the first 150-200 thousand kilometers of exploitation, drivers just should not forget to replace filters and change transmission fluid in a timely manner (depending on the driving style). Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type∞CVTFWD1756,5VTF DEXRON CVT Technical issues and repair guidelines A minimum set of procedures during the overhaul of these CVTs includes the following: - Belt replacement - Replacement of all spare parts, gaskets, seals, sealing strips, rings, which often include two pistons Friction elements of Forward pack often get burnt, including a bearing disc and pistons, the whole set of frictions gets replaced. Problems of “old” VT25E: - Valve Body, VT25E CVT. - Planetary gear, Reverse (6 Gear) . It is required to replace CVT when cones get worn out (because of aggressive accelerations "at a cold motor" and driving with contaminated oil). Which cars run with this gearbox?BrandModelYearTypeEngineOpel / VauxhallVECTRA02-04CVT FWDL4 1.8L How to repair this transmission (Videos)Repair cvt VT25-E/VT20-E, Saturn, Opel Instruction manuals and useful linksLink typeSourceDescriptionpdfwww.at-manuals.comScheme VT20Epdfwww.at-manuals.comScheme VT25E

Transmission general data The 6-speed automatic transmission U660E designed by Aisin in 2006 for FWD cars Lexus ES350, as well as for the luxury 6-cylinder models (Camry, RAV4, Avensis) for 3.5 lit. The unit was paired with the V6 engine.The U660F unit is intended for AWD crossovers and sedans. The U660 unit is a competitor of ZF 6HP26. In 2009, the U660 unit was complemented by U760E model cured from "common problems" and intened for a bit lower torque from the engine (up to 2.7 l). After some period of time the U761E sub-modification was released for less powerful engines with 2.0-liter capacity. Repair parts for this gearbox are the same as for U760. Among the market competitors of the U760 unit, specialists point out the ZF 6HP21 unit. Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type6ATFWD/AWD6,52,8Toyota Type WS Technical issues and repair guidelines Friction lining of the lockup unit is not the most crucial problem for driving, but it is critical for the “health” of this transmission. The torque converter is the main "contaminator" and the source of all problems of clogged valve body and solenoids. This gearbox usually covers 200 thousand kilometers, but the driver can significantly cut its service life by an aggressive driving style. Almost all major repairs of this gearbox include the torque converter repair. The torque converter repair with replacement of worn-out friction lining every 150-250 thousand kilometers (depending on the driving style) allows saving of some money on the valve body replacement. According to judgement of experts, the most common problem of the U660E unit is related to the main housing bearing, which is attached to a “weak” circlip. The drum of Direct package is one more problem of this gearbox. Many gearboxes with short mileages (only70-100 thousand kilometers) were handed in for the overhaul and replacement of burnt clutch cover С1-С2 - Drum (Direct) in the assembled condition. Another issue is related to wear-out and burning of frictions in braking packages B1-B3 (gears 2 and 6). The most frequently replaced component is a set of frictions in the package C1/C2 (gears 1-4). Generally the whole set of friction components is replaced. Valve body and solenoids in U660E The most common problem for all 6-speed automatic gearboxes is the worn valve body. The problem with the valve body, which operated with damaged torque converter lockup and contaminated ATF, is related to wear-out or slagging of channels and plunger-valves of the valve body. The most frequently replaced component in the electrical part is the selector position plate with temperature sensors. The overheated temperature sensor is often considered to be the reason of the valve body malfunction. The first reason of early issues with electrical components (before covering 200 thousand kilometers) is the automatic transmission overheating. Almost each overhaul of overheated U660E transmission is accompanied with the order of pistons kit. The list of spare parts that may be damaged in this sophisticated gearbox as a result of neglected bearing vibrations is quite large (crown gear, sun gear, planetary gears, differential, pistons). It should be taken into account, that all abovementioned problems with the U660 unit are common for very old or quite worn-out automatics. A high percentage of cars equipped with U660 serve before covering standard 200 thousand kilometers (in many cases even longer) without any repairs under the condition of timely ATF change and filter replacement. Which cars run with this gearbox?BrandModelYearTypeEngineLEXUSES06-166 SP FWDL4 2.0L 2.5L V6 3.5LLEXUSRX08-156 SP F/4WDV6 3.5LLotusELISE12-156 SP RWDV6 3.5LLotusEVORA10-166 SP RWDV6 3.5LToyotaALPHARD08-146 SP F/4WDV6 3.5LToyotaAVALON07-166 SP FWDV6 3.5LToyotaAVENSIS08-166 SP FWDL4 2.2LToyotaBLADE08-126 SP FWDV6 3.5LToyotaCAMRY06-166 SP FWDL4 2.0L 2.5L V6 3.5LToyotaESTIMA06-166 SP F/4WDV6 3.5LToyotaHIGHLANDER09-166 SP F/4WDL4 2.0L V6 3.5LToyotaMARK X ZIO07-136 SP F/4WDV6 3.5LToyotaRAV412-166 SP F/4WDL4 2.0L 2.2LToyotaSIENNA10-166 SP F/4WDV6 3.5LToyotaVANGUARD116 SP F/4WDV6 3.5LToyotaVENZA08-166 SP F/4WDV6 3.5LToyotaVERSO09-166 SP FWDL4 1.6L 2.2L How to repair this transmission (Videos)U660E / U760E Gear Set and ComponentsU760E with code P2716U760E TCMU660E Intro ATRA Instruction manuals and useful linksLink typeSourceDescriptionpdfwww.at-manuals.comRepair manual U660E/Fpdfwww.at-manuals.comScheme U660E/Fwebwww.at-manuals.comCheck Balls U660Ewebwww.at-manuals.comStall test U660EpdfSonnaxValve Body Layout U660E/F, U760E/F

Transmission general data The 4-speed automatic gearbox Toyota U340 (U341) has been used since 2000 on FWD Toyota Avensis, Corolla etc. with engine capacity up to 2 liters. One more leading transmission which is commonly met in repair services.This transmission was designed together with U140\ U240 (and identical in design) and was a very popular transmission in the field of repair among Aisin gear shifting units. The modification U341E provides higher torque, therefore it is used in engines with higher operational capacity Celica (1.8 l), the U341F unit is the version for four-wheeled vehicles (4WD). Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type4ATFWD82,9Toyota Type WS Technical issues and repair guidelines The whole mechanical and hydraulic part of these transmissions is very robust and the service life before the 1-st major repair is above 200-300 thousand kilometers depending on the driving style of auto users. During the first years U340-341 units require timely change of fluid and filter replacement. After some period of operation and due to frictions wear-out (torque converter in particular), the fluid gets contaminated more rapidly and that results in more frequent ATF change. Frequent change of automatic transmission fluid postpones the replacement of the torque converter lining. One of the most common problems is the oil leakage from the pump seal located between the gearbox and the torque converter. The seal is changed together with the bushing. One of the most common parts to be replaced in new units (produced since 2009) is the EPC solenoid, which operates in much more intensive way than others. This transmission gets out of order after continuous operation in contaminated ATF with worn-out rings and seals. Timely change of ATF and repair of rings included in the repair kit makes it possible for this solenoid to operate during the whole period of the transmission usage period. Typical issues with valve body and solenoids in U340 The electrical components of this transmission are quite durable, therefore the whole U340 unit may be considered as a very reliable transmission. However, during each disassembly procedure of this gearbox, specialists usually rebuild and clean the valve body and solenoids, which get damaged because of contaminated ATF. The clogged valve body may lead to unpredictable slippage in the package, where the fluid is not transmitted through corresponding valve body plunger. Long-term operation of this transmission with such problem leads to premature wear of practically “invincible” friction components in this unit. Which cars run with this gearbox?BrandModelYearTypeEngineToyotaETIOS / VALCO13-164 SP FWDL4 1.2L 1.5L 1.6L How to repair this transmission (Videos)U340E Corolla Valve Body Problems Instruction manuals and useful linksLink typeSourceDescriptionpdfwww.at-manuals.comRepair manual U340pdfwww.at-manuals.comManual U340epdfwww.at-manuals.comScheme U340Ewebwww.at-manuals.comStall test U340epdfSonnaxValve Body Layout U341E/FpdfSonnaxU341E/F TCC Slip Diagnosis

Transmission general data Transmission repair specialists frequently have to deal with repair issues in the 4-speed automatic transmissions U140E, U240, U241 and the entire range of these transmissions from Aisin Co. Aisin engineers wanted to design the U140E unit with a potential extension to 5 speeds.In 2000, more enhanced modification named U240 was introduced and a lot of U140\ U240 automatics found application in the whole range of popular Toyota cars at the auto market in Japan. The U241E (U240E) transmission has been operating safely since 2000 on the front-wheel (four-wheel drive) middle class cars with engine capacity from 2 up to 3 liters.The structure of these automatic units is so robust and sophisticated that even the presence of some soft spots (such as the third planetary gear) does not prevent U240-241 transmissions from being installed on very popular Toyota cars. Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type4ATFWD/AWD9,54,2Toyota Type T-IV Technical issues and repair guidelines The risk group of car with this reliable transmission includes heavy cars with 3-liter engines, where gearbox components operate under heavy loads and the 1-st overhaul may occur even before the car travels 200 thousand kilometers. The first component to be repaired is the torque converter. In "old" U140 units transmission specialists have to pay closer attention to the output planet, which may have some issues related to the damage of pinion-satellites axles caused by critical loads. The sun gear gets damaged together with satellites of the planetary gear. At the following stage of damaging process, fragments of the damaged planetary gear crush the rear planetary gear of the U140 unit. The back cover is the second problematic place for this transmission: it performs a support function in U140-240 design. This issue is common for high-power engines both in RAV-4, and in Camry, Lexus RX300. According to the statistics change of frictions and steel disks in the Direct package is performed 3-4 times more frequently than in any other package. One more frequently replaced element in the Direct clutch package is the rubber-covered piston with a holder. The rubber gets damaged very fast failing under higher temperatures and dry functioning with jittering. When the pump bushing gets damaged it should be repaired together with the torque converter. The typical problem of the ECU during first years of operation – non-soldered contacts, causing unpredictable burning of packages and pressure jumps. Almost each overhaul includes a preventive change of the pump cup seal on the left side and the left semi-axle seal on the housing side. The 4-speed automatic transmissions U140E , U240 , U241 from Aisin Co traditionally have very reliable and persistent elecal components. Specialists almost every time are restricted to the repair and cleaning of the valve body and solenoids without any expensive replacements. The repair of old valve bodies involves cleaning of soot deposits and rebuilding of channels used for movement of valves. Which cars run with this gearbox?BrandModelYearTypeEngineLEXUSES99-024 SP FWDV6 3.0LLEXUSRX98-034 SP F/4WDV6 3.0LToyotaCAMRY02-034 SP FWDV6 3.0LToyotaESTIMA00-064 SP F/4WDL4 2.0L V6 3.0LToyotaHARRIER00-034 SP F/4WDV6 3.0LToyotaHIGHLANDER01-074 SP F/4WDL4 2.4L V6 3.0LToyotaKLUGER V00-034 SP F/4WDV6 3.0LToyotaWINDOM00-024 SP FWDV6 3.0L How to repair this transmission (Videos)U140 Teardown InspectionPart 1-4 2002 Lexus RX300 U140Part 2-4 2002 Lexus RX300 U140Part 3-4 2002 Lexus RX300 U140Part 4-4 2002 Lexus RX300 U140 Instruction manuals and useful linksLink typeSourceDescriptionpdfValve Body ProU140 Shifting Pre Infopdfwww.at-manuals.comScheme U140pdfwww.at-manuals.comManual U140pdfSonnaxValve Body Layout U140E/F, U240E, U241E webSonnaxToyota U140E Detailing

Transmission general data The 6-speed automatic transmission AT6 (TF-70SC) from Aisin Co was designed in 2006 for FWD Peugeot cars of the middle class with the engine from 1.6 to 2 liters. This transmission has the torque capacity of up to 220 Nm (according to Aisin). After a long testing this automatic transmission was launched in the mass production in 2009, but was produced not as actively as the TF80 transmission unit. It was developed for Peugeot-Citroen cars on the constructive basis of TF-80SC (AM6 High torque capacity- up to 400 Nm). Inner parts of this transmission are similar to TF60-SN. Aisin name is AWF6F25. Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type6ATFWD2206,13,2Тойота WS Technical issues and repair guidelines The transmission AT6 has an electronic control integrated in the design of the transmission. One of the features of these automatic transmissions is the forced control of the torque converter lock-up. This feature, on the one hand, gives an increase in efficiency and rapid acceleration with fuel economy, but, on the other hand, it significantly loads the torque converter and the valve body. In previous versions of transmissions it led to the rapid wear-out of the valve body and the breakdown of solenoids. The transmission is designed as an "invincible" solution and operates till the old age of the car, when the transmission repair no longer makes sense. But violation of simple rules of operation for this automatic transmission can lead to the overhaul only after 150-200 thousand kilometers. Repair procedures and typical problems For the first overhaul specialists order the Repair kit of gaskets and seals. This repair kit is ordered mainly because of teflon rings, which wear out primarily from exploitation with contaminated oil and overloads. The chain of malfunctions starts with the clogged valve body and solenoids, which do not transmit enough oil to the line of one of the packages, therefore the transmission shifts gears with a delay or a kick. One of the typical problems in modern 6-speed automatic transmissions, and in the TF-80SC in particular, is related to the valve body. The valve body is extremely sensitive to the friction suspension from the torque converter in the ATF. Frequent oil changes facilitate the valve body self-cleaning. But now the valve body itself has become almost invincible because all soft spots related to channels transmitting contaminated oil and the plunger with valves have become the part of the solenoid design. It should be borne in mind, that the higher the wearout level of rings and rubber gaskets, the more ATF should be transmitted by the pump through valves of the valve body in order to compensate losses. Therefore solenoids operating in heavier oil current wear out much faster. For this reason, each reassembly and replacement of solenoids should be accompanied by replacement of spare parts. Which cars run with this gearbox?BrandModelYearTypeEngineBeijingautoX6515-166 SP F/4WDL4 2.0LCitroenC410-166 SP FWDL3 1.2L L4 1.6L 1.8LCitroenC4 LOUNGE13-166 SP FWDL4 1.6L 2.0LCitroenC509-166 SP FWDL4 1.6L 2.0L 2.2LCitroenDS411-166 SP FWDL4 1.6LCitroenDS511-166 SP FWDL4 1.6LDongfengAX714-166 SP FWDL4 2.0L 2.2LDongfengB20166 SP FWDL4 2.0LDongfengL6015-166 SP FWDL4 1.8LDSDS5 LS14-166 SP FWDL4 1.6L 1.8LFiat50010-166 SP FWDL4 1.4LFiat500L14-166 SP FWDL4 1.4L 2.0LJEEPRENEGADE15-166 SP FWDL4 1.7LMINICOUNTRYMAN20126 SP FWDL4 1.6LMINIROADSTER20126 SP FWDL4 1.6LPeugeot300809-166 SP FWDL4 1.6L 2.0LPeugeot30809-166 SP FWDL4 1.6L 2.0LPeugeot40812-166 SP FWDL4 1.6L 2.0LPeugeot500809-166 SP FWDL4 1.6LPeugeot50810-166 SP FWDL4 1.6L 1.8L 2.0LPeugeotRCZ09-156 SP FWDL4 1.6LVolvoS6015-166 SP FWDL3 1.5L L4 2.0L How to repair this transmission (Videos)TF-72SC Teardown