Forward Engagement Slips, Shudders, or Chatters

FORWARD ENGAGEMENT SLIPS, SHUDDERS, OR CHATTERS
1. Improper fluid level.
2. Damaged or improperly adjusted manual linkage.
3. Low main control pressure.
4. Valve body bolts loose or too tight.
5. Sticking or dirty valve body.
6. Forward clutch piston ball check not seating or leaking.
7. Forward clutch piston seals cut or worn.
8. Overdrive one-way clutch damaged.
9. Rear one-way clutch damaged.