No First Gear
WARNING: This page is about a different variant/trim than selected.
No First Gear
| Checks |
Causes |
| A/Trans Fluid Pan Assembly (29) |
Verify proper fluid level and condition, inspect transmission assembly for leaks. |
| Center Support (67) |
- Inspect for damaged low clutch sprag assembly (467). Holding the sprag assembly with the retaining ring facing up, and the inner race of the sprag assembly fixed, the outer race should freewheel counterclockwise.
- Inspect for damaged low and reverse clutch piston assembly (470), spring (469), spring retaining ring (466), and center support assembly (459).
- Inspect for damaged or worn low and reverse clutch plates (463-465).
- Inspect for damaged low and reverse clutch backing plate retaining ring (461).
- Inspect for cut, worn, or damaged low clutch sprag seal (468).
|
| Control Valve Upper Body Assembly (304) |
- Inspect for sticking, damaged, or worn 1st/Rev and 4-5-6 clutch regulator valve (327) and spring (326).
- Inspect for sticking, damaged, or worn #1 ball check valve.
- Inspect for sticking, damaged, or worn #2 ball check valve.
- Inspect for sticking, damaged, or worn #3 ball check valve.
- Inspect for sticking, damaged, or worn 1-2-3-4 clutch regulator valve (337).
|
| Control Valve Lower Body (307) |
- Inspect for sticking, damaged, or worn clutch select valve 2 (352) and spring (353).
- Inspect for sticking, damaged, or worn clutch select valve 3 (352) and spring (353).
|
| Center Support Fluid Passage Seal (20) |
- Inspect for worn, cut, or damaged seals.
- Inspect for proper seal (20) size (6L45/50E MYA/MYB) vs (6L80/90E MYC/MYD).
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