No Fourth Gear, or Slips in Fourth Gear
WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
No Fourth Gear, Slips in Fourth Gear
| Checks | Causes |
|---|---|
| Intermediate/Fourth Band & Servo | No apply or slipping |
| Servo Piston (77) | Broken or binding |
| Servo Piston Seals (78, 79) | Leaking |
| Servo Pin (76) and Springs (78, 79) | Binding |
| Servo Cover (80) | Broken, loose, or leaking |
| Band (100) | Broken, worn, or out of position |
| Case (1) | Cracked at the band seat |
| Band Apply Fluid Routing | Fluid leak and fluid restricting |
|
|
| 1-2 Shift Solenoid Valve (305) |
|
| 3-4 Shift Valve (319) | Stuck in the downshifted position |
| Manual Valve (800) | Misaligned in Manual Third gear |
| 3-4 Accumulator |
|
| 3-4 Accumulator Valve (323) | Stuck |
| Line Pressure | Low pressure Refer to High or Low Line Pressure . |
| Direct Clutch | A low capacity will cause a failure in the Fourth gear |
| PSA | Hydraulic or electrical malfunction |