Road Test
- Ensure shift linkage or cable is properly adjusted and fluid level and condition are okay. Add fluid and adjust shift linkage or cable as needed.
- Road test vehicle, operating transaxle in each gear range. Check for slipping or any variation in shifting.
- If vehicle operates properly at highway speeds but has poor acceleration, torque converter stator clutch may be slipping. If acceleration through all gears is normal, but high throttle opening is required to maintain highway speeds, torque converter stator clutch may be seized. Torque converter must be replaced if stator clutch is faulty.
- In most cases, slipping clutch can be determined by noting transaxle operation in all gear positions and noting which clutches are applied. See CLUTCH & BAND APPLICATIONS under TROUBLE SHOOTING.
- Process of elimination can be used to detect any component which slips and to confirm proper operation of good components. Although road test analysis can usually diagnose slipping components, actual malfunction usually cannot be decided. Practically any condition can be caused by leaking hydraulic circuits or sticking valves.
CAUTION:
If torque converter is replaced or TCM is changed from one vehicle to another, proper procedure must be followed to reset Electronically Modulated Converter Clutch (EMCC) in torque converter to prevent shudder during clutch engagement for lock-up using scan tool. Follow scan tool instructions.