Master rebuild kit for the VW/Audi 01M 4-speed automatic: friction plates, steel plates, full overhaul seal and gasket set, plus the transmission filter.
If your Mk3 or Mk4 Golf, Jetta or New Beetle automatic bangs into second, flares on the 2-3 shift, or limps along in third with a gear monitoring fault stored, the 01M inside it has usually worn its clutches and leaked past its piston seals. This master rebuild kit, catalogued under T10900C (with T10902C, T109080C and T109081C also referenced), packs the friction plate set, the steel plate set, the full overhaul set of lip seals, gaskets, sealing rings and O-rings, and a new transmission oil filter for a complete overhaul of the VW / Audi 01M four-speed.
The 01M is a transverse four-speed with a lockup converter, planetary gearsets, clutch packs, brakes and a gear-driven open differential. Wikipedia traces it to the Renault-owned STA plant in France: it is close kin to the Renault AD4, and it replaced the 096 used in 1992-1994 Mk3 cars. The control unit commands each shift through solenoids in an aluminum valve body, and the clutch and brake pistons then clamp their packs with line pressure. The weak points Wikipedia lists are exactly what this kit renews: torn piston diaphragms that leak pressure internally, plus the worn clutches and bands that follow. It also notes that plastic internals can be damaged when the fluid overheats, so a unit that has been run hot needs a careful inspection beyond the soft parts in this box.
The 01M is sensitive to fluid level and to its electronics. Ross-Tech lists low or incorrect fluid, a faulty speed sensor, worn clutches and valve body faults as causes of 00652, so check level using the factory check-plug method before condemning the internals. Wikipedia also describes a throttle-pedal procedure that resets learned shift behavior; it will not erase codes, but it can cure erratic shifts caused by confused adaptations. Test the solenoids and wiring with our solenoid testing guide, and use the slipping diagnosis guide to separate true clutch slip from a hydraulic problem. If the solenoid bores are worn, a replacement 01M valve body belongs in the same job, because this kit has no solenoids or valve body parts.
The listing names the 01M in the VW Golf, Jetta, New Beetle and Passat and the Audi A3 and TT, with the 095 / 096 family references. Be careful with two of those. The 01M Passat application on standard references is the earlier B4 car; the 1998-on B5 Passat uses a longitudinal five-speed, and the TT does not appear on 01M application lists. In North America the safe matches are 1995-1999 Mk3 Jetta and Golf, 1999-2005 Mk4 Jetta, Golf and GTI, and 1998-2005 New Beetle with the four-speed automatic. Read the three-character transmission code stamped above the starter flange and match it to your car, or send us the year and VIN. There is no dedicated 01M collection page, so related parts are listed in our rebuild kits category.
Inspect the pump bushing and the differential bearings before you commit to reassembly; neither is in the kit, and our pump bushing wear guide explains what to measure. Cracked factory apply pistons are common enough that many builders add the 01M piston kit while the drums are apart. Soak the new frictions, set each pack clearance with the new stack, and air-check every clutch and brake before closing the case. Install the new filter from this kit. Refill with the VW-approved fluid (G 052 162, or the Pentosin ATF-1 and Mercon V alternatives Wikipedia lists), setting the level through the check plug at 35-38 C with the engine running. Remember the final drive has its own gear oil, checked through the speed sensor gear opening. Because the oil-to-coolant cooler on top of the case can trap debris, flush or replace the 01M cooler after a clutch failure.
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Usually not. The 01M Passat application is the earlier B4 car. The 1998-on B5 Passat automatic is a different longitudinal transmission. Check the three-letter code above the starter flange or send us your VIN.
Use VW G 052 162 or an approved equivalent such as Pentosin ATF-1. Fill through the check plug at the bottom of the pan with the engine running and the fluid at 35-38 C. The final drive takes separate 75W-90 GL-4 gear oil.
Yes. The listing includes the transmission oil filter along with the frictions, steels and overhaul seal and gasket set. Solenoids, the valve body, bushings and the converter are not included.
It is the gear monitoring fault: the control unit sees an input and output speed ratio that does not match the commanded gear. Low fluid, a speed sensor fault, valve body wear and slipping clutches can all set it, so verify fluid and sensors before rebuilding.
Yes. Clear the codes with a scan tool and reset the learned shift values so the control unit does not apply old clutch-wear corrections to new frictions. Then drive gently through all four gears while it relearns.
If any apply piston is cracked or its bonded seal is torn, yes. Cracked pistons are a known 01M failure and cause pressure loss that new frictions alone will not fix.
