Automatic Transaxle Overhaul & Testing - 4T60-E: Specifications Oldsmobile Silhouette II

TORQUE CONVERTER INSPECTION

Torque converter must be replaced for any of the following reasons.

1. Damage To Pump Assembly
2. Metal Particles Present In Oil
3. Leaks In Hub Weld Area
4. Crankshaft Pilot Broken Or Damaged
5. Hub Scored Or Damaged
6. Stator Failure
7. Torque Converter Imbalance
8. Overheating (Torque Converter Is Blue)
9. Engine Coolant Contamination
10. Excessive End Play

TORQUE CONVERTER STALL SPEED TEST

Note. Information not available.

TORQUE CONVERTER NOISE TEST

1. Torque converter whine is usually noticed when vehicle is stopped and transaxle is in Reverse or Drive. Whine will increase when engine RPM is increased and will stop when vehicle is moving or when torque converter clutch is applied. Stall test is to ensure whine is coming from torque converter.
2. Start engine, and allow it to reach normal operating temperature. Apply parking and service brakes. Put transaxle in Drive. Depress accelerator to about 1200 RPM for less than 6 seconds. DO NOT depress accelerator for more than 6 seconds or transaxle damage may occur. Torque converter noise will increase under this load.

Note. Torque converter whine should not be confused with pump whine, which is usually noticeable in Park, Neutral and all other gear ranges. Pump whine will vary with pressure.

TORQUE CONVERTER STATOR CHECK

1. Torque converter stator roller clutch can either remain locked up at all times or freewheel in both directions. If stator is freewheeling at all times, vehicle tends to have poor acceleration from a stop. Vehicle may act normal at speeds above 30-35 MPH.
2. If poor acceleration is noted, ensure exhaust system is not blocked, engine timing is correct and transaxle is in 1st gear when starting from a stop. If stator is locked up at all times, performance from a stop appears normal. Engine RPM and acceleration is limited at high speeds. Engine may overheat from this condition.
3. A visual inspection of torque converter may reveal converter is Blue from overheating. If torque converter has been removed from vehicle, stator roller clutch can be checked by inserting 2 fingers into splined inner race of roller clutch and trying to turn race in both directions. Inner race should turn freely clockwise but should not turn or should be difficult to turn counterclockwise.

TORQUE CONVERTER END PLAY CHECK

Mount Torque Converter End Play Fixture (J-35138) and Dial Gauge (J-8001) on torque converter to check end play. End play should be 0-.020" (0-0.51 mm). (Scheme 9)

Scheme 9

TRANSAXLE SPECIFICATIONS

TRANSAXLE SPECIFICATIONS

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS