A/T - THM 200/200C No Reverse
TSB 87-41 (Jul)SUBJECT: THM 200/200C
PROBLEM:
No reverse. Upshifts are good, and vehicle has engine braking in manual low.
POSSIBLE CAUSE:
Sticking low overrun clutch valve. The valve may be free, but have a piece of foreign material in the bore not allowing the valve to fully stroke.
SOLUTION:
Service Procedure:
1. Remove the valve body assembly from the transmission.
2. Remove the checkballs from the valve body
3. Drain off excess oil and visually inspect for sticking valves.
4. Dis-assemble valve body and visually check the low overrun clutch valve for nicks, burrs, or foreign material.
5. If it cannot be freed up, replace the valve body assembly.