Torque Converter Stator

The torque converter stator can malfunction in two different ways; it can either remain locked up at all times or freewheel in both directions. If the stator is freewheeling at all times, the vehicle tends to have poor acceleration from a standstill. The vehicle may perform nominally at speeds above 50 to 55 km/h (30 to 35 mph). If poor acceleration is noted, it should be determined that the exhaust is not blocked, the engine timing is correct, and the transaxle is in first (low) gear on initial acceleration.

If the stator is locked up at all times, performance for a standstill will appear normal. Engine rpm and acceleration is restricted or limited, however, only at high speeds. The engine may overheat with this condition. The converter exterior may appear blue as a result of overheating.

If the torque converter has been removed from the vehicle, the stator can be checked by inserting a finger into the splined inner race and trying to turn the race in both directions. The inner race should turn freely clockwise, but should not turn counterclockwise. The torque converter should not be replaced if:
- The fluid has an odor, is discolored, and there is no evidence of metallic or clutch material particles. Drain the torque converter completely and reinstall.
- The threads in one or more of the converter bolt holes are damaged. Refer to ENGINE for standard thread repair procedures.
- Transaxle failure did not display evidence of damaged or worn internal parts, metal particles or clutch material in the unit or the fluid pan. Drain the torque converter completely and reinstall.