TORQUE CONVERTER INSPECTION
Torque converter must be replaced for any of the following reasons
- Damage To Pump Assembly
- Metal Particles Present In Oil
- Leaks In Hub Weld Area
- Hub Scored Or Damaged
- Stator Failure
- Torque Converter Imbalance
- Engine Coolant Contamination
- Excessive End Play
TORQUE CONVERTER STALL TEST
- 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.
- 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 ranges.
TORQUE CONVERTER STATOR CHECK
- Torque converter stator roller clutch may either remain locked up at all times or free-wheel in both directions. If stator is free-wheeling at all times, vehicle tends to have poor acceleration from a stop. Vehicle may act normal at speeds above 30-35 MPH.
- 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.
- 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 a finger 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 CLUTCH (TCC) CONTROL COMPONENTS
The following component signals are used in TCC operation
TRANSAXLE SPECIFICATIONS
| Application | End Play: In. (mm) |
|---|---|
| Final Drive Pinion Gears | .009-.025 (.23-.64) |
| Input & Reaction Carrier Pinion Gears | .009-.027 (.23-.69) |
TRANSAXLE SPECIFICATIONS
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) |
|---|---|
| Channel Plate Bolts (2) (1) | 10.5 (14) |
| Side Cover Bolts & Stud | 15 (20) |
| Spacer Plate Bolts | 10.5 (14) |
| INCH Lbs. (N.m) | |
| All Other Channel Plate Bolts | 106 (12) |
| Control Valve Assembly Bolts | 106 (12) |
| Drive Sprocket Attaching Screws | 106 (12) |
| Input Speed Sensor Bolt | 106 (12) |
| Intermediate/4th Servo Cover Bolts | 106 (12) |
| Low & Reverse Servo Cover Bolts | 106 (12) |
| Oil Feed Tube Bolts | 106 (12) |
| Oil Pan Bolts | 106 (12) |
| Oil Pump Bolts | 106 (12) |
| Output Speed Sensor Bolts | 106 (12) |
| (1) Bolts are located at 1 o'clock and 5 o'clock position near axle shaft seal. | |
| (1) | Bolts are located at 1 o'clock and 5 o'clock position near axle shaft seal. |
TORQUE SPECIFICATIONS