Drive In 1 But Not In D or 2

1. Improperly adjusted manual linkage.
2. Incorrect fluid level.
3. Improperly adjusted downshift cable.
4. Dirty valve body passages.
5. Worn front clutch and seals.
6. Worn forward sun gear sealing rings.
7. Leaking or missing driven shaft cup plug.
8. Worn or damaged front pump and drive tangs.
9. Leaking pump inlet pipe.
10. Defective one-way clutch.