No Reverse, All Forward Ranges OK

Ties Up
1. Forward clutch not releasing due to burned clutch plates, piston seal ring missing or sticking exhaust check ball.

Slippage
1. Low Line Pressure in reverse.
2. Restricted case to low and reverse clutch housing cup plug assembly.
3. Low and reverse clutch piston or seal leakage.
4. Low and reverse pipe O-ring or washer damaged or missing.
5. Incorrect gasket for driven sprocket support height.
6. Low 1st orifice in spacer plate plugged or missing.
7. Burned direct clutch.
8. Burned low and reverse clutch.