No Drive In Forward Ranges, Reverse Ok

1. Low line pressure in Drive. Check line pressure in Drive at 1000 RPM.
2. Manual linkage binding.
3. Driven sprocket support drive oil passage or case cover gasket restricted.
4. Drive oil passage leak in case cover.
5. Driven sprocket support sleeve loose or mislocated.
6. Burned forward clutch.
7. Leaking valve body pipe in control valve assembly.