ATF pump, disassembling and assembling: Notes

2002 Volkswagen Golf GLS, 2.0 K, StandardSECTION Notes
WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2002 Volkswagen Cabrio, 2001 Volkswagen Cabrio, 2000 Volkswagen Cabrio, 1999 Volkswagen Jetta, and 1999 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.

Replacement ATF pump parts and the ATF pump must comply with transmission code.

The following list pertains to Fig 1.

  1. Piston ring 
  2. Piston ring 
  3. Piston ring 
  4. Thrust washer 
  5. Piston 
    • Sealing lips are vulcanized to the piston
    • Moisten sealing lips with ATF before installing
    • Turn piston slightly when installing
  6. Bolt 
    • Tightening torque: 10 N.m (7 ft lb) plus and additional 1/8 turn (45 °)
  7. Stator support 
  8. Outer gear 
    • Manufacturer's marking (arrow) faces stator support
    • If outer gear is incorrectly installed, ATF pump may not operate freely in installed position
  9. Inner gear 
    • Larger groove faces stator support
  10. Housing for ATF pump 
  11. O-ring 
    • Always replace
  12. Torque converter oil seal 
  13. Fig 1: Identifying ATF Pump Components
    G03362399Courtesy of VOLKSWAGEN OF AMERICA, INC.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.