No Engine Braking In 1ST Speed

1. Low overrun clutch valve binding in valve body. The following conditions will also cause no reverse.
2. Low-reverse clutch piston seals broken or missing.
3. Porosity in low-reverse piston or housing.
4. Low-reverse clutch housing snap ring out of case.
5. Cup plug or rubber seal missing or damaged between case and low-reverse clutch housing.