Slips in Reverse or No Reverse

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Checks	Cause
DEFINITION: A large engine RPM increase is noted with little or no vehicle rearward speed increase during the following conditions: The engine is running. The transmission is in Reverse range. The vehicle is stopped or moving slowly. The vehicle brakes are not applied. The throttle is opened 25 percent or greater.
Automatic Transmission Fluid Level	Low fluid level
Transmission Main Line Pressure	Low transmission main line pressure
Manual Linkage	Misadjusted
Oil Filter Assembly	The oil filter assembly (100) is missing, plugged, or damaged. The oil filter seal assembly (101) is missing or damaged.
Reverse Band Servo Assembly	A servo piston oil seal ring (43) is missing or is damaged. A servo piston (44) is damaged or is stuck in the case bore. The servo piston cushion springs (45, 47) or the retainer (46) is missing or damaged. The servo piston pin (48) is not engaged to the reverse band assembly (615). The reverse band assembly (615) is worn or burned. The reverse band assembly (615) is disengaged from the anchor pin (117B) band. The anchor pin (117B) is loose or missing.
Torque Converter Assembly	The torque converter assembly (1) stator clutch is not holding.
Drive Link Assembly	The drive link assembly (507) is broken. The drive/driven sprockets (516/506) are damaged.
Input Clutch Assembly	The input clutch sprag assembly (722) is damaged or misassembled. The input clutch housing oil seal rings (628) are missing or are damaged. The input clutch housing ball check valve assembly (633) is missing or is damaged. The input clutch piston inner/outer seals (634/635) are missing or are damaged. The input clutch piston (636) is damaged. The input clutch plates (654-658) are worn.
Reverse Reaction Drum	The reverse reaction drum (669) splines are damaged.
Input and Reaction Carrier Assemblies	The input carrier assembly (672) or the reaction carrier assembly (675) components are damaged.
Differential Carrier Assembly	The park pawl assembly (694) is broken or damaged. The sun gear shaft (689), the internal gear assembly (693), or the carrier assembly (700) components are damaged.