Forward Engagement Slips/Shudders/Chatters

FORWARD ENGAGEMENT SLIPS, SHUDDERS, AND/OR CHATTERS
1. Improper fluid level.
2. Improperly adjusted or damaged linkage.
3. Low main control pressure.
4. Valve body bolts improperly torqued.
5. Valve body dirty or valves sticking.
6. Forward clutch piston check ball leaking and/or not seating.
7. Cut and/or worn forward clutch piston seal.
8. Leaking forward clutch stator support seal rings Nos. 3 and 4.
9. Damaged low one-way clutch (planetary).