The Volkswagen 01M transmission is a four-speed automatic electronic/hydraulic transmission used in Cabrio, Jetta, Golf, GTI, New Beetle produced between 1995 to 2005, and the Passats transverse engine was produced between 1995 and 1997. This the transmission is fully engineered and most likely manufactured by the French company STA (owned by Renault) in Ruitz (Pas-de-Calais, France).
Video Volkswagen 01M transmission
Design
01M and its predecessor 096 are very similar to other transmissions engineered and manufactured by STA: AR4, AD4 and AD8, deployed on Renault vehicles in the 1980s and 1990s. It is an electronically controlled transmission with locking torque converter, using planetary gears, coupling packets, and gear drives with open differentials. There are no chains in this transmission. It has no provision for dipstick. It was decided that the dipstick and contents could invite the owner to enter the wrong or lower liquid. More information on design and functionality can be found in the VW publication, SSP112 Mechanical Independent Study Program for early versions for 92-94 096, or SSP172 for 01M from 95-06.
The transmission has an oil cooler to the liquid mounted on top of the transmission. The transmission oil is heated/cooled by an antifreeze engine that flows through the coolant.
Maps Volkswagen 01M transmission
Weak Points
Some areas of failure in this transmission include damage to internal plastics due to over-temperature fluid conditions, internal fluid pressure leaks from torn piston diaphragms, worn-out piston holes for solenoid in aluminum valve body, and worn grips and bands. Sometimes, the plastic speedometer drive gear will break and fall off the differential carrier and the speedometer will stop working. To correct this, the transmission must be removed and the differential disassembled far enough to replace the plastic teeth. With age, the resistance in the cable and/or electrical terminal between the valve body and the transmission controller may increase. Additional resistance can prevent the computer from reading the faint pulsation of the transmission speed sensor. The missing sensor signal causes the transmission to switch to "fail safe" or "weak" mode. This mode stores the transmission in the third gear and the gear indicator on the instrument panel shows all the teeth selected simultaneously.
Substitution
If you replace this transmission with a new or used transmission, pay particular attention to the transmission code. The code is a three-character code stamped on the pad just above the starter flanges. These transmissions are available in several gear ratios for different engines and vehicles, so it's important to get the transmission with the same code or other code known as the same gear ratio. If the gear ratios are not the same, the transmission controller will assume the transmission is slipping and enter the safe fail mode.
Rebuild
The 01M transmission is a special transmission that is only used on Volkswagen vehicles, although very similar to those used on Renault vehicles. As a result, most local transmission shops or national chains will have no specific training, knowledge, and tools to test and rework the important parts of this transmission. This may cause some teardown in the warranty to obtain acceptable results, if possible.
Checking/Filling Oil Level
Correct liquid is synthetic mineral oil, such as Pentocin ATF-1 or Volkswagen G 052 162 A2. 3.750 liters is usually enough for filter changes. The transmission fluid is checked from under the vehicle while running and transmitting in the park. This must be completed before the transmission is fully heated up. Upon walking, the drain plug at the bottom of the transmission oil pan is removed with a 5mm allen wrench. Some fluids will drip whether the oil level is full or low. There is a pile of plastic in the hole, similar to a chimney, which keeps all fluids from running out. This stack maintains the right level at the right temperature. If the liquid is "glugging" or almost running out of the bottom hole when the transmission temperature is in the range of 95F-113F, no further action is required. Reseat the plug and reattach the charging lid. If no liquid exits, fill the transmission with a certain liquid bit by bit until the liquid is observed "glugging" or just barely run out of holes at the bottom. No further action is required. Plug the channel plug and fill the tube cap.
This transmission has separate oil for differential in transmission, so there are two levels of fluid to check. The differential fluid is checked by releasing the speed sensor gear and using it as a dipstick. The speed sensor gear assembly is located above the transmission just above the CV connection in the right. Differentials are emptied by removing the final drive cover on the back of the transmission or by vacuum extraction through the speed sensor hole. Vacuum extraction is a more attractive option because gasket paper closes the steel cover and access is very difficult. Charge through the speed sensor hole. Differential oil capacity is about 1 liter. An acceptable differential oil is a synthetic Redline MT-90 75W90 gear oil or synthetic 75W90 GL4 gear oil. Be careful not to put sand or dust into the differential, because the differential has no way to filter the oil.
Transmission Controller
This transmission shift is controlled by the Transmission Control Module, or TCM. There are three shift modes that the transmission can be set to change the shift points as well as the shift speed (the number of transmission slip between shifts). Factory Mode, Economy/Tour Mode, and Sport Mode. The economic mode seeks to keep the engine spin lower to save fuel, while Sport mode allows the engine to move higher before shift, as well as shifts faster with sacrifices to the economy. Changing this mode requires transmission programming through the factory scan tool.
This computer uses "fuzzy logic" to learn the driver's driving habits to set the specific shift points. If two or more drivers with different driving styles have been driving a car, TCM can become "confused" and start acting silly. Such silly behavior can manifest in difficult shifts, slips, difficulty entering teeth at idle, etc.
A quick fix is ​​to rearrange "fuzzy logic" by doing the following: Sitting in the driver's seat ignites the ignition key without starting the car. Immediately plug the accelerator to the floor. Count to five seconds. Release pedal. Turn the key off then immediately turn on the machine.
If your problem comes from a chaotic TCM, this will solve the problem. This will not reset the problem code on the computer. It should be done with the proper OBDII scanning tool like VAG 5052 at VW dealer.
The transmission computer is under the back seat of the Volkswagen Golf Mk3/Jetta/Passat model, under the right side dashboard cover of the New Beetle Volkswagen model, and in the wiper area area of ​​the other Volkswagen Golf Mk4/Jetta models.
predecessor
Prior to the 01M transmission, VW used a 096 four-speed MK3 Golf/Jetta car from 1992-1994. These cars will have a SPORT/ECONOMIC switch near the shifter or on the dashboard to change the shift points.
But the original ancestors were the AR4 transmissions, which were used on Renault vehicles with longitudinal machines (4 and 6 cylinders) in the 1980s: R25, R21 and Espace. Two different versions for transverse engines developed in the early 1990s: AD4 for 4 cylinders (Renault Clio, MÃÆ'Â © gane, Laguna, Safrane) and AD8 for 6 cylinders (Renault Laguna, Safrane). Both VW 096 and 01M transmissions are similar to AD4, and many parts are interchangeable.
Some of the 096 sections are held for 01M transmissions, such as oil filters, oil pans, filler tubes, gaskets, speedometer gears, slip plates, etc. This transmission has a different torque converter and other internal parts that can not be interchanged.
Successor
The 01M production ended with the last of the Mk4 Golf body style in 2006. Replaced by the Jatco JF506E 5-speed automatic (09A) Tiptronic designed transmission, and then Tiptronic automatic transmission 6-speed (09G) Aisin in the New Beetle Convertible, as well as the transmission dual clutch Direct-Shift Gearbox (DSG) in the latest models of the cars above. DSG does not have a torque converter, and is more similar to a pair of manual transmissions in a single housing.
References
Source of the article : Wikipedia
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