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T-90 Transmission Service Diagnosis - M38A1
T-90 Transmission illustration shown for reference only - click here to shop for these parts by interactive diagram
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| Slips out of high gear: | Possible Solution: |
|---|---|
| Transmission misaligned with bell housing | Align transmission case to bell housing to engine |
| End play in main drive gear | Tighten front retainer |
| Damaged pilot bearing or front bearing | Replace |
| Slips out of second: | Possible Solution: |
| Worn gear | Replace |
| Weak poppet spring | Replace |
| Noise in low gear: | Possible Solution: |
| Gear teeth worn | Replace gears |
| Shifting shoe bent | Replace shoe |
| Lack of lubrication | Drain and refill |
| Grease leak into bell housing: | Possible Solution: |
| Gasket broken front bearing retainer | Replace |
| Transmission main drive gear oil seal | Replace |
* Learn more about the T-90 Transmission from the Service Manual for 52-66 M38A1