No Reverse Gear
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
| Checks |
Causes |
| Control Solenoid (w/Body and TCM) Valve Assembly |
Check the 35R PC Solenoid 2 for proper operation. Refer to Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test . |
| Control Valve Body Assembly |
- Inspect the 3-5-Reverse Clutch Regulator Valve (421) and Control Valve Body Ball Check Valve (404) for debris and stickyness.
- Inspect the Clutch Select Valve (428) and the Actuator Feed Limit Valve (430) for debris and stickyness.
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| Low and Reverse Clutch |
- Inspect for stripped or sheared splines on Low and Reverse Clutch Plates (545 - 547)
- Inspect for damaged, deformed or improper surface finish on the Low and Reverse Clutch Plates (545 - 547)
- Inspect for stripped or sheared splines on Low and Reverse Clutch Backing Plate (544)
- Inspect for worn, damaged or debonding Low and Reverse Clutch Piston Seals (550)
- Inspect for broken or fatigued Low and Reverse Clutch Piston Return Spring (549)
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| Transmission Case Assembly |
Inspect the Input Shaft Support (56) for missing or damaged Fluid Seal Rings (58). |
| 3-5 Reverse Clutch Assembly |
- Inspect for damaged, stripped or sheared splines on 3-5 Reverse Clutch Plates (507 - 509), Backing Plate (510).
- Inspect for stripped or sheared splines on 3-5 Rev/4-5-6 Housing to Turbine Shaft (516).
- Inspect for damage, improper surface finish, porosity, deformed or unbalanced 3-5 Rev/4-5-6 Housing (516).
- Inspect for damaged, worn, loose or seized hub bushing in the 3-5 Rev/4-5-6 Housing.
- Inspect for broken, porous or improper surface finish or plugged oil passages of the 3-5 Rev/4-5-6 Housing (516).
- Inspect for failure of the Input Shaft Thrust Bearing (538).
- Inspect for disengaged or broken 3-5 Reverse Clutch Backing Plate Retainer (511).
- Inspect for damaged, worn or leaking 3-5 Reverse Clutch Piston Seals (504 - 506).
- Inspect for damaged or broken 3-5 Rev/4-5-6 Clutch Housing (516).
- Inspect for warped, damaged, improper surface finish or debonding 3-5 Reverse Clutch Piston (502).
- Inspect for broken or fatiqued 3-5 Reverse Clutch Spring (503).
- Inspect for disengaged or broken Speed Sensor Reluctor Retainer (500).
- Inspect for broken Speed Sensor Reluctor Wheel (501).
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