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Technical Service Information O1M Technicians Guide INDEX CLUTCH APPLICATION SOLENOID APPLICATION INTERNAL WIRE HARNESS SOLENOID I.D. INTERNAL COMPONENT RESISTANCE CHECK SOLENOID AIR CHECK PROCEDURE VALVE BODY BREAKDOWN SPRING SPECS CHECK BALL LOCATION COMPONENT AIR CHECK PROCEDURE HYDRAULIC SCHEMATICS PARK REVERSE NEUTRAL OVERDRIVE RANGE 1st GEAR OVERDRIVE RANGE 2nd GEAR OVERDRIVE RANGE 3rd GEAR OVERDRIVE RANGE 4th GEAR OVERDRIVE RANGE 4th GEAR TCC ON MANUAL “1” RANGE 1st GEAR VALVE BODY MAPPING / PASSAGE I.D. HARSH 1 2 UPSHIFT T.S.B DIAGNOSTIC TROUBLE CODES MANUAL PROCEDURE FOR RETURN TO BASIC SETUP MANUAL PROCEDURE FOR RETURN TO BASIC SETTINGS AUTOMATIC TRANSMISSION SERVICE GROUP INDEX Technical Service Information VOLKSWAGEN 01M PRELIMINARY INFORMATION The 01M designated transaxle, shown in Figure 1, first appeared in the 1995 model year and was used in a wide variety of the Volkswagen car lines along with various engine combinations, including the 2.8L V6 engine, as shown in the chart below. The 01M transaxle is a 4 speed unit, with 4th gear being overdrive, and is equipped with a clutch in the torque converter. Refer to the chart in Figure 1 for the internal components that are applied in each of the four forward gear ranges. Notice that it has only one freewheel device for 1st gear. 01M MODEL USAGE CHART Vehicle Years Engine Size Cabrio 1995 2001 2.0L L4 Beetle 1998 2001 1.8L L4 , 2.0L L4 , 1.9L Diesel Golf 1995 2001 1.8L L4 , 2.0L L4 , 1.9L Diesel GTI 1999 2001 1.8L L4 , 2.8L V6 Jetta 1995 2001 1.8L L4 , 2.0L L4 , 1.9L Diesel, 2.8L V6 Passat 1995 1997 2.0L L4 , 2.8L V6 The 01M transaxle is totally electronic controlled and uses a Electronic Control Unit ECU to control shift points, apply and release of the torque converter clutch, and line pressure control. This is done using seven solenoids located on the valve body. The solenoid pattern for each ge