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No Reverse

  1. Low fluid level. Low fluid pressure. High clutch dragging. Check transaxle for 2nd gear operation. If no 2nd gear, refer to DTC 22/P0732. Refer to AUTO TRANS DIAGNOSIS - SATURN ELECTRONIC CONTROLS - 1995 article or AUTO TRANS DIAGNOSIS - SATURN ELECTRONIC CONTROLS - 1996 article in the AUTOMATIC TRANSMISSIONS section. If 2nd gear is possible, ensure flat surface of manual valve is facing up.
  2. If manual valve is okay, remove valve body. Block off reverse pressure from servo-to-2nd clutch port. Using a rag, cover 1st, 3rd and 4th oil presure-to-servo port to prevent fluid spray. See Fig 1 . Apply air pressure to reverse pressure-to-servo port.
  3. If servo does not move, check servo piston for stuck condition and damaged seal. If servo motor moves, repair faulty dog clutch or oil tube hub seal rings.
Fig 1: Locating Fluid Pressure Ports
G92A14555Courtesy of GENERAL MOTORS CORP.
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