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Transmission general data
The 09G (TF60-SN - according to Aisin Co classification) is the first 6-speed transmission which has been used since 2003 for virtually all FWD cars of Volkswagen and Audi family (A3, A4 and TT) with engine capacity from 1.4 up to 2.0 liters (Mini Cooper, Skoda Fabia, Polo)
The 09G is designed for torque up to 280 Nm.This solution is the successor of 5-speed AW55-50. It competes with the German transmission ZF 6HP19-/21 and considered to be more durable and relatively cheap in repair.
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type6ATFWD28074G 052 025 A2
Technical issues and repair guidelines
The 09K and 09M sub-modifications were released after testing and upgrade of the 09G transmission. They were used together with engines with the capacity equal up to 3.5 liters (TF-62SN -61SN, Passat, Superb, Transporter). Many other modifications of this transmission, which differ mainly in electric components and the valve body construction, can be encountered in the repair shops. Peculiarities of the TF60SN transmission are typical for most of 6-speed transmissions and are associated with fast ATF contamination by the friction lining of the torque converter which operates with slipping of the lockup clutch, and when the engine operates under unusually high temperature. The torque converter is rebuilt during each overhaul.
Typical repair procedures for the 09G (TF-61SN \TF-60SN) transmission
Typical overhaul of the 09G transmission involves reassembly and replacement of following spare parts:
A set of 4 problematic pistons consisting of a piston / retainer pair for a problematic package К2 (С2) and retainers of clutches K1 and K3 is almost always changed together with seals and gaskets (overhaul kit). It is recommended to replace friction clutches together when the К2 package burns out completely and the rest of friction linings are stained with burnt ATFAbnormal operation of the TF60-SN valve body often manifests itself in problems with 4-5-6 speeds. Error codes - P0734, P0735 or P0729 signal that solenoids and valves of the valve body are worn / clogged. The solenoids are rebushed with the help of the Bushings Repair Kit.The transmission pump is the next stage in the repair process. The axle deformation, surface damage and bushing cranking are caused by an uneven wear out of friction lining and related thereto vibrations. The tool kit of bushings (5 pieces) also gets replaced. The most deformed bushings are: bushings of sun gear, rear cover, pump, and package К3 (С3).
The typical malfunction can be described as follows:
1-st stage. The torque converter friction gets actuated with slippage starting from the 3-rd gear, without waiting for the levelling of the transmission and engine shaft RPM. The friction element gets damaged and contaminates ATF with hard and sticky powder.
2-nd stage. Plungers and valves get blocked and give less oil pressure to one of the packages, and as a result, worn parts have leakages, oil overflows, critical decrease of pressure in the clutch packs.
One of the most complicated cases is the wearout of the valve body and/or one of its irreplaceable components. Then it is required to change the entire valve body. Another reason the valve body failure is the replacement of solenoids which exhausted their performance potential. Preliminary, it is required to check the wiring and electrics contacts. It is rare that problems are caused by the shaft speed sensors ISS and OSS, they are cleaned and the ATF is washed off. The replacement of pump and semi-axle seals is also performed quite frequently.
The pump bushing (46.9x43.9x14.8) is replaced, if the wear-out reaches 0.10 mm. First of all, friction components and clutch steel discs K2 4-5-6 (C2) are examined for wear. Clearances in clutch packages affect the quality of switching and hard parts wear-out. It is required to change the Piston К2 (C2) and the retainer. The retainer K1 is also replaced quite frequently. The cause of this problem is solved by replacing the repair clutch of the rear cover. It is more rarely that you have to replace spare parts of the K3 package. In many cases, the clutch drum wear-out leads to some kicks (impact) while shifting gears. The factory clearance (gap) is 1.4 mm. When the clearance (gap) increases up to 1.8 mm, then kicks become noticeable. Such friction components are replaced to stop the wearout chain reaction.
Problems with the rear planetary gear are mainly explained by slipping of insufficiently lubricated bushings. The torque converter is one of the typical problems for 6-speed automatic transmissions. It works with a wide “slippage mode”. The pressure for blocking is provided not by simple electric valve, but by the PWM solenoid. This mode of operation increases the car efficiency, but enormously speeds up the process of wear-out for the torque converter friction lining.
Which cars run with this gearbox?BrandModelYearTypeEngineAudiTT03-066 SP F/4WDL4 1.8LVolkswagenTOURAN03-066 SP FWDL4 1.6L 1.9L
How to repair this transmission (Videos)09G Transmission Repair - Part-109G Transmission Repair Part-2TF60SN solenoids fix recondition repair upgrade shift kit
Instruction manuals and useful linksLink typeSourceDescriptionpdfmedia.cylex.com6-speed automatic gearbox 09G Servicepdfwww.atra.comDisassemble the Solenoids 09Gpdfwww.evosoft.dkDesign and Function Self-Study Program 09Gwebwww.at-manuals.comSolenoid/clutch application chart 09GpdfSonnaxValve Body Layout TF-60SNpdfSonnaxVacuum test AW TF-60SN, BMW 6F21WA, VW/AUDI 09G, 09K, 09M
Transmission general data
The 5-speed automatic transmission 09A \ 09B (according to Jatco - JF506E classification) was designed in 1999 by Jatco for the European market of FWD cars with engine up to 3.8l. The first budget version of this 5-speed automatic transmission is used in the cars as a reliable and unpretentious alternative to expensive the AW55-50 from Aisin and ZF 5HP19-24.
After several modifications, this transmission has been actively used in Nissan – as RE5F01A and in Mazda as JA5A-EL. Most of all, this transmission is found under the German name 09A \ 09B in VW, Audi and under the name JF506E - in the English Jaguar and Land Rover. American Ford tried to use this transmission for European Mondeo and
Galaxy (as 5F31J). The Japanese had been installing this transmission
until recently at American assembly plants of Nissan (Altima, Quest) and
Mitsubishi (Eclipse, Galant). JF506E is mainly installed on
English Jaguar X, Rover, Freelander, less often – on German Golf, Bora,
Jetta and even less often on Portugese SEAT Alhambra and AUDI А3.
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type5ATFWD35095G 052 990
Technical issues and repair guidelines
The 09A\09B/JF506E filter with metal mesh is replaced during the transmission reassembly. The planned overhaul of older JF506E lies in replacement of worn-out rings and gaskets which are frequently exposed to leakages. The overhaul includes the assembly and replacement of the whole friction components kit. Kicks, pushes, and slipping in this transmission are considered to be the symptom of solenoids and valve body malfunction.
One of the reason for valve body malfunction is the damage (by contaminated ATF) of the channel and valve (TCС Pressure Regulator Valve) controlling torque converter blocking . Then goes a chain reaction related to fast ATF contamination by the torque converter clutch, and dirt starts damaging other channels and solenoid-operated valves. The whole solenoid kit (9 pcs) is usually replaced in the process of transmissions (which covered more than 200-300 tonne-kilometre) overhaul. Common spare parts for cosmetic repair are: pump seal and pump bush, which is identical for RE4F03A. The filter helps to preserve ATF clean and reduces friction units wear-out.
Which cars run with this gearbox?BrandModelYearTypeEngineVolkswagenBORA00-055 SP F/4WDL4 1.8L 1.9L L5 2.3LVolkswagenGOLF/GTI00-075 SP FWDL4 1.8L 1.9L L5 2.3LVolkswagenJETTA02-085 SP F/4WDL4 1.8L 1.9L DIESEL V6 2.8LVolkswagenSHARAN00-105 SP F/4WDL4 1.8L 1.9L V6 2.8L
How to repair this transmission (Videos)09A Transmission - Teardown InspectionFreelander Transmissionsolenoid replacement transmission N92 solenoid bolt fix
Instruction manuals and useful linksLink typeSourceDescriptionpdfwww.at-manuals.comTechnical supplement JF506Epdfwww.at-manuals.comTransTec Manual JF506Ewebwww.at-manuals.comSolenoid application chart JF506Epdfdrive.google.comRepair manual Update Handbook ATSG JF506e
Transmission general data
Since 1975 this 3-speed automatic transmission VAG 010 (later in 1983, it was used as a prototype for the automatic transmissions 087 and 089) has been successfully operating on many FWD models of Volkswagen (CABRIOLET, GOLF, JETTA) and Audi (80, 100, 200, ... and 4000S) with engines from 1.6 to 2.2 liters and on all Audi models starting from simple Audi 80 up to Audi 5000S. One more rare modification of this transmission for RWD vehicles - "090" (VANAGON) was released in 1978.
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type3ATFWD63Dexron III
Technical issues and repair guidelines
The most popular kit of spare parts for maintenance of this “invincible” transmission, which often comes to the repair shop with half million kilometers of mileage usually consists of:
- Kit of friction components
- Kit of gaskets and seals (Overhaul Kit)
- Full kit of spare parts, which includes all gaskets, seals, frictions and steel discs (MasterKit). Sometimes, repair specialists order a separate kit of steel discs.There is some difference between repair kits of gaskets and seals for Audi 087 and 089 models.
As for the replacement frequency, then come the following spare parts:
- pump and axle seals (included in the repair kit), which are replaced with a full kit of bushings, their wear-out causes vibrations (which damage seals) and oil pressure in packages gets lost (that leads to friction linings burning);
- Rubber-covered pistons with friction clutches of packages Forward or Direct;
- Brake band (Direct, High/ Reverse) is replaced when it is completely worn;
- Rebuilding of the torque converter with replacement of spare parts.
This automatic transmission is very simple and reliable, which is used by many specialists as a guidebook for learning trasnmission repair methods.
Which cars run with this gearbox?BrandModelYearTypeEngineVolkswagenCABRIOLET85-923 SP FWDL4 1.8LVolkswagenGOLF85-923 SP FWDL4 1.8L 2.0LVolkswagenJETTA80-923 SP FWDL4 1.6L 1.7L 1.8L
How to repair this transmission (Videos)BUILDING A VW TRANSMISSION010 AUTOMOTIVE AUTOMATIC TRANSMISSIONS – LAYOUT and OPERATION
Instruction manuals and useful linksLink typeSourceDescriptionwebwww.at-manuals.comType 010 3-Speed Diagnosis & Overhaulpdfwww.at-manuals.comTransmission breakdown illustration 010pdfsympatico.ca010 troubleshooting guidepdfthesamba.comRepair manual 010 transmission
Transmission general data
The 4- speed automatic transmissions BAXA had been
installed in Honda Accord since 1998 until 2002 and in Acura with the engine
capacity 2.3 liters since 1998 until 1999. The list of construction
peculiarities of BAXA transmission includes: 6 solenoids, 2 pressure sensors,
and lack of overrun clutches. The design concept of solenoids helps to manage
the shift overlap for upshifts and downshifts.
Honda Accord; 98-00; L4 2.3L; Honda BAXA; ATF Capacity/Change: 6.4/6.1 2.9/2.7
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type4ATFWD6,12,7Honda Z-1
Technical issues and repair guidelines
The list of commonly replaced spare parts in this transmission includes two typical problems: wear-out of clutches of the 2-nd gear and damage of bearings. With worn-out clutches the car can operate for quite a long time, but the damage of bearings leads to non-operability of all transmission units. Bearing chips easily get through filters and penetrate aluminum transmission parts, plastic ring gaskets, and literally “eat” transmission components. The differential bearing is damaged in most cases, and sometimes needle bearings on shafts.
Wear-out of the 2-nd gear has the following symptoms:
1. Slipping when switching on the 2-nd gear
2. Jolt when stopping the car
3. Experiencing a jolt when shifting from mode D to 2 (when the car is stopped with started engine and depressed brake pedal).
The wear-out of bearings is identified with the help of following signs:
1. The sound of transmission disappears when shifting gear in “Park” or “N” mode. This symptom indicates damage of needle bearings in shafts.
2. Slap noise in chassis when running over high spots on the road, a large clearance of the transmission driven shaft, oil leakages from seals of driving gears.
Transmission specialists recommend the following measures to prevent abovementioned problems:
1. Regular change of ATF and installation of additional radiator cooling system can really help in extending the service life of BAXA transmission.
2. When first signs of the transmission malfunction are detected, it is required to dissemble transmission and replace clutches, ring gaskets, and bearings.
How to repair this transmission (Videos)Part 1 Disassembly BAXAPart 2 Disassembly BAXAPart 3 Disassembly BAXABAXA Automatic Transmission Overhaul Part 1 TeardownOverhaul Part 2 Reassembly
Transmission general data
The history of 4-speed FWD AXOD / AXOD-E / AX4S transmission started in 1986 when Crown Victoria was very popular with the engine 4.6 liters and Ford came up with the idea to produce a new bestseller for vehicles of lower class – Ford Taurusс with the engine capacity equal to 3.0 liters.
This transmission can be considered as a model emulated by the whole world of automatic transmissions. The transmission identification is specified according to the shape of the oil pan and gaskets. The gasket was covered with rubber in 1999 for the AX4S, but the pan shape was the same.
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type4ATFWD25012,26,6Mercon V
Technical issues and repair guidelines
This family of automatic transmissions didn’t have a strong reputation among transmission experts. The transmission had a lot of problems with shifting gears 1-2, required frequent ATF changes, and had a short resource before and after the overhaul.
It is assumed that design solutions on the torque converter for this transmission are not good enough. All updates intended for improving the comfort of driving and its cost efficiency led to the following consequences: the transmission started operating under harsh conditions in terms of ATF temperature and its contaminanation.
The overhaul usually consists of transmission reassembly with the repair kit of gaskets and seals "Overhaul kit". “Old” vehicles (and vehicles which get in repair services with burnt oil) require replacement of brake bands O.D. and Rear (for old models). Due to the oil pressure losses in the line, problems occur in the shaft and its bushings. Spare parts of packs Direct and Forward usually get burnt because of high rate of operation. The main problem is related to the transmission design. And it is recommended to solve this problem by installing additional transmission radiator and each year change the ATF and replace the filter.
How to repair this transmission (Videos)AX4S Overheatingtransmission problemAX4S 4F50N No Forward Gears
Instruction manuals and useful linksLink typeSourceDescriptionpdfdrive.google.comAXODE (AX4S) UPDATE HANDBOOK ATSG
Transmission general data
ATX is a 3-speed automatic transmission
manufactured by Ford within the period from 1981 until 1994. It was Ford's 1-st
automatic gearbox designed for FWD and cross-mounted engine. The structural
design of this transmission is not complicated, but very reliable. This gearbox
has a lockup torque converter, but no overdrive gear.
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type3ATFWD5,63,2Type H ATF /Dexron III/Mercon ATF
Technical issues and repair guidelines
ATX was mainly installed in Ford Taurus and Ford Escort models. This fully hydraulic transmission is rarely met in repair services. However, owners of ATX may have problems with gear shifting if the engine is not warmed up. But transmission repair specialists say that the reason of this issue lies in wear-out of plastic gears, which can be replaced without dismounting and disassembly of the transmission.
How to repair this transmission (Videos)Ford Escort ATX Transmission Fluid Change
Transmission general data
The family of 4-speed automatic transmissions
"TorqueFlite" - A518 / A618, has been mainly installed on the
rear-wheel drive trucks and vans produced by Dodge and Jeep since 1990. The A518
was modified to 46RH (retainer hydraulic) and later to 46RE (retainer
electronic), while A618 was updated to 47RE and 48RE. The A618 transmission is
considered to be a heavier-duty modification of A518. The driving torque of the
A618 transmission is equal to 610 Nm.
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type4ATRWD61013,44,8Mopar ATF+4
The design of the A518/A618 and 46RH / 46RE /
47RH / 47RE / 48RE transmissions is based on the same principle. All
differences and modifications consist in the increased number of gears and
addition of the torque converter and the block of solenoids.
Typical problems
Transmissions of this family were used by car
manufacturers for three decades thanks to their easy maintenance and resistance
to wear. Not complicated assembly of these transmissions simplifies their
repair process. Early transmissions of this family rarely require any repair.
The problem of spare parts replacement occurs in cars equipped with
transmissions, which have solenoids and the valve body. These transmission
components get out of order when the car mileage reaches 100 thousand
kilometers. Such breakdowns result in expansive repair services, because
damaged components should be replaced.
The most problematic areas in A518/A618:
- Central Support
- Retained (Governor) is usually rebuilt
- Direct Drum – exhausts its resource, but more
often this component burns out because of a long-time operation with
insufficient linear pressure
- Reverse Drum
- Frictional wheel-hub. Direct.
- The set of solenoids and sensors
Other seals, bushings, springs and bearings
fail to function occasionally, due to peculiarities of the driving style and
operation.
How to repair this transmission (Videos)47rh tear downRemanufactured Transmission48RE Transmission Teardown InspectionDodge 47RECUMMINS 47RE TRANSMISSION REBUILD
Instruction manuals and useful linksLink typeSourceDescriptionpdfSonnaxValve Body Layout 48REwebSonnaxDodge 48RE Hydraulic Features Revealed
Transmission general data
The legendary family of automatic transmissions А40D (А42, А43, А44, А45, A46) was developed by Aisin Warner and belongs to Toyota Group. They have been used since 1985 as a 3-speed transmission named as 03-55(А40), and since 1979 as a 4-speed transmission for RWD cars with the engine capacity from 1.6 up to 3 liters. The 4-speed gearbox has D letter in its name and an additional clutch "Overdrive" in the 4-speed in the design.This gearbox is mainly used in right-hand drive cars (Hiace, Liteace etc.) and in other Toyota RWD cars in Asia. The modification with some other valve body AW03-70 .../72 or AW371, AW372 was produced for other markets. This modification was installed on Suzuki, Mitsubishi, etc. The most popular models of this family in repair services A44DE, 46DE \F (Previa), A42DE, 43DE were updated and released in 2000. This transmission is an example of a standard structural design, which was widely used by ZF in 4HP22 and by American Ford in its A4LD. The design of almost all rear-driven gearboxes ensures uniform wear-out of all units and solid safety coefficient of gearbox components, therefore these gearboxes easily travel 500 thousand kilometers. Earlier the repair process mainly involved transmission replacement.
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type4ATRWD2306,34Toyota T-IV
Technical issues and repair guidelines
Typical issues of the А40 transmission are mainly caused by the the unit's ageing:
- Damaged torque converter lockup clutch. The damage of the lockup frequently causes heavy vibrations, resulting in the seal damage, then leading to issues with the pump liner and the pump itself.
- Worn-out friction components in Direct- Forward and Reverse packs. Old cars usually require replacement of these frictions.
- Rubber elements become hard with time and overheating causes the wear of rings, leading to pressure supply deficiency in packages and burning of friction components.
Overhauls mainly include the transmission reassembly and cleaning procedures accompanied by spare parts replacement – namely, worn-out brake blocks, frictions and gaskets with seals. All friction components are usually replaced during the overhaul of transmissions in cars with high mileage and burnt oil.The second most commonly replaced component in this transmission is the Low reverse clutch. Major repairs of hard parts mainly take place when the pump bushing (and leaking seal) gets damaged by the torque converter lockup clutch.
How to repair this transmission (Videos)A40 Series Transmission Parts IdentificationA40 Series Transmission - Powerflow A40 hydraulic overview
Instruction manuals and useful linksLink typeSourceDescriptionpdfwww.at-manuals.comRepair manual A43Dpdfwww.at-manuals.comRepair manual A46DEpdfwww.at-manuals.comScheme A40Dwebwww.at-manuals.comClutch application A40pdfmitsubishi-motorsRepair manual V4AW2-3
Transmission general data
In terms of design, the 3-speed automatic transmission A131L with hydraulic control belongs to the family of FWD transmissions (А140 -\240-\540). Almost all hardware and spare parts are interchangeable.
This automatic gearbox is a very rare “guest” in repair shops. This is partly thanks to the fact that this transmission is maintenance friendly, simple, trouble-free in operation and its service life is much longer than the lifespan of the most reliable car. Usually this transmission is installed on American Corollas.
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type3ATFWD1506,32,4Dexron VI
Technical issues and repair guidelines
Simple and robust design of the A130 unit with two “invincible” planetary gears and without solenoids gives no reason for visits to repair services.The overhaul of this gearbox takes place after impressive mileages and frequently involves the torque converter repair, replacement of seals and gaskets, and less frequently replacement of worn-out friction components and even less often – brake bands.
Car owners prefer to change the filter (possible to use a А140 filter) than cleaning it, therefore statistics related to selling of spare parts for this transmission is unimpressive. A new filter with a narrow slot scoop produced in 1990 was supposed to force auto owners to change filters.The most common spare parts that wear out in these gearboxes are the following: seals, gaskets, rubber elements that become hard, weakening spring, damaged Direct and Forward friction elements, worn-out brake band.
How to repair this transmission (Videos)Service A131L
Instruction manuals and useful linksLink typeSourceDescriptionpdfwww.at-manuals.comScheme
Transmission general data
The family of 6-speed automatic gearboxes of GM 6T30E, 6T40E, 6T45E "Hydra-Matic" is a state-of-the-art range of FWD gearboxes used on Buick and Chevrolet vehicles from 1.4 to 3.2 lit. The 6T45E found application on FWD and AWD vehicles.
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type6ATFWD2508,24Dexron VI
Technical issues and repair guidelines
These gearboxes can operate properly with spare parts of different quality. Standard repair kits of gaskets and seals produced by ATOC often ordered for repair of these gearboxes.In case of ATF overheating it is often required to change all pistons because the rubber gets hard under the influence of the temperature. The set of pistons consists of 5 pieces.
The transmission fluid for these gearboxes should be changed every 40-80 thousand kilometers and checked for opacity every visit to repair services taking into account short service life of solenoids and torque converters (TC) with slippages. In the course of each overhaul, TC is reassembled and the lock-up clutch is replaced, because its wear-out reduces the resource of solenoids.Leaking seal of the TC unit is a sign of possible issues with the pump bushing, which gets damaged by vibrations and wear-out of the TC lock-up.
The construction of this gearbox is conceptually the same with ZF of 6HP series and problems in these gearboxes are caused by the same factors:vibrations which damage bushings. Vibrations lead to situations when ATF leaks through worn-out bushings.This is one more present-day gearbox in which it is important to examine the quality and temperature of ATF. In situation of any apprehensions related to contaminated ATF – change the fluid for protecting the valve body. It is also recommended to keep a wary eye on symptoms of the pressure loss in the line after a long-term operation as well as check and clean the valve body with solenoids. The TC unit repair with replacement of friction discs is required in the situation of rapid ATF pollution and issues with the valve body (especially with the mileage higher than 130-150 thousand kilometers). Overloading with high torques and aggressive accelerations also may have a bad impact on this gearbox.
On the top of everything else, experts recommend to install additional transmission radiator for the whole 6Т range of transmissions. Cars with this transmission manufactured over the last years are adjusted in more cautious way and stop drivers from using the car with neglect to this good 6-speed gearbox, which is capable to compete with Jatco CVTs in terms of comfort.
How to repair this transmission (Videos)Removing the bellhousing to install seals and a filter6T40 Teardown6T40 Series, no reverse6T40 Valvebody6T75-E Transmission - No Reverse6T70 Teardown6T70 Valvebody6T75 TCM REPAIR
Instruction manuals and useful linksLink typeSourceDescriptionwebwww.at-manuals.comScheme 6t40pdfwww.at-manuals.comRepair manual valve body 6t40webwww.at-manuals.comSolenoid identification 6t40webwww.at-manuals.comStall testpdfSonnaxValve Body Layout 6T30 & 6T40 (Gen. 2), 6T45 (Gen. 2), 6T50 (Gen. 2)pdfSonnaxValve Body Layout GM Gen. 1 6T40, 6T45, 6T50pdfSonnaxVacuum Test Guide 6T45 (Gen. 2), 6T50 (Gen. 2), 6T30, 6T40 (Gen. 2)pdfSonnaxVacuum test valvebody 1st GEN. 6T40, 6T45, 6T50
Transmission general data
The 4-speed automatic transmission ZF 4HP22 was designed in the early 1980s for 2-3 liter diesel (rear-driven) car models. It has a "classic" engineering structure, ensuring not only high robustness, but also even wear-out of parts without obvious soft spots. The 4HP22 - 24 unit was used by all European automakers of high-priced and reliable cars: Audi, BMW, Jaguar etc. In terms of design, this transmission is similar to famous A4LD from Ford and A40-series from Toyota. The 4HP24 unit found application in 4WD models.
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type4ATRWD4009,34LT 71141
Technical issues and repair guidelines
The difference between 4HP22 and 4HP24 modifications lies in frictions and steel discs in packages. The modification with the valve body (type Е9) and 4 solenoids is the most common in repair, while earlier series with 5-solenoids in the valve body are considered to be a rarity.The ZF 4HP24 unit is a fail-safe and massive transmission, constructed with the help of high-quality materials, ensuring enhanced safety margin.
Repair procedures
Friction components of the Forward package are the first to get burnt because of intensive operation. The percentage of hard parts replacement and seals (separately) is quite low only in the overhaul kit (repair kit). It is common to replace worn-out pump housing bushing (covers – 17 mm), and less frequently bushings (13 mm) with the pump gasket and pump seal in the 4HP22/24 unit suffering from oil starvation. Land Rover’s oil pump gets out of service early because of contaminated fluid and long-term operation with a faulty torque converter. It is required to perform the torque converter repair together with the abovementioned procedure.The improper operation of clogged or worn-out solenoids and valve body is named as the main reason of oil starvation causing burning of the package Forward.
The replacement of solenoids is a scheduled procedure for old cars using this transmission. The problem of a dirty valve body is usually explained by worn-out locking clutch of the torque converter. If there are some delays with gears shifting, kicks or slippage in ZF 4HP22 with mileages above 200 thousand kilometers, then it signals that springs and solenoids cannot handle the dirt from frictions falling on valves. The minor overhaul prolongs the resource of this transmission for many years. It is suggested that the average resource of ZF4HP22 (4HP24) before the overhaul can reach up to 300 thousand kilometers, but it depends on the driving style “aggressiveness”.
How to repair this transmission (Videos)Service & Valve Body Recondition
Instruction manuals and useful linksLink typeSourceDescriptionpdfwww.at-manuals.comScheme
Transmission general data
This family of 5-speed automatic transmissions Honda includes several sub-groups. A typical order for reassembly of 5-speed automatic transmission in old cars includes the following:
- Repair kit of gaskets and seals
-Kit of friction components
- Filter
- Electrical parts and Low block
Spare parts for the 5-speed automatic transmission designed by Honda should be selected according to the VIN-code.
Number of gearsTransmission TypeDriveTorque (Nm)ATF (full capacity) LATF (change) LATF type5ATAWD7,93,3Honda Z-1
Technical issues and repair guidelines
In many cases, the Low Hub one-way clutch gets out of order because of overloadings. It gets wedged and the sun gear breaks. High torque from 3-liter engine damages the rear drum of the 3-rd package (3rd Drum). The spring breaks, that causes damage to the entire unit. Specialists also replace piston, a thin spring holder, retaining ring. In addition a powerful engine damages rear bearings.EPC line pressure solenoids (which operate very intensively) get out of order because of ageing and overheating. Another soft spot of the valve body is the jar of accumulators, rubbing shafts with teflon rings that leads to the pressure loss.
Which cars run with this gearbox?BrandModelYearTypeEngineAcuraMDX01-025 SP 4WDV6 3.5L
How to repair this transmission (Videos)BGHA Transmission - Teardown Inspection
Instruction manuals and useful linksLink typeSourceDescriptionpdfSonnaxValve Body Layout BVGA Honda/Acura 4/5 SpeedwebSonnaxKeeping Cool While Investigating Mystery Honda OverheatpdfSonnaxHonda/Acura 4/5 Speed Identification GuidewebSonnaxOverheated Honda Converters/740 Codes