Isolating Vibration
Notice: Some engine/transaxle
combinations cannot be balanced in this manner due to restricted access or limited clearances between the torque converter bolts and the engine. Ensure that the bolts do not bottom out in the lug nuts or the torque converter cover which could dent and cause
internal damage.
To isolate and correct a flywheel or torque converter vibration, separate
the torque converter from the flywheel to determine if vibration is in the
engine or transmission.
- With the engine at idle speed and the transmission in PARK or
NEUTRAL, observe the vibration.
- Turn the engine OFF.
- Raise and suitably support the vehicle.
Refer to
Lifting and Jacking the Vehicle
in General Information.
- Remove the transmission converter cover bolts and the cover.
Refer to
Torque Converter Cover Replacement
.
- Verify the bolt torques attaching the converter to the flywheel
are to specification.
- Remove the bolts attaching the converter to the flywheel.
Refer to
Flywheel to Torque Converter Bolt Replacement
.
- Slide the torque converter away from the flywheel.
- Rotate the flywheel (1) to inspect for defects or damage.
Refer to
Engine Flywheel Cleaning and Inspection
in Engine Mechanical.
- Rotate the torque converter to inspect lugs and pilot (2)
for damage. Verify presence of balance weight on O.D. of torque converter.
- Lower the vehicle.
- With the engine at idle speed and the transmission in PARK or
NEUTRAL, observe the vibration.
Refer to
Engine Related Vibration
in Vibration Diagnosis and Correction.
- Turn the engine OFF.
Installing Torque Converter
- Raise and suitably support the vehicle.
Refer to
Lifting and Jacking the Vehicle
in General Information.
- Align the torque converter pilot (2) in the engine crankshaft (3)
and slide the torque converter up against the flywheel.
- Hand install the first torque converter to flywheel bolt while
holding the converter flush against the flywheel
- Index the torque converter/flywheel two bolt positions. Verify
the torque converter lug is flush against the flywheel. If a gap exists (1 mm
or greater), unfasten and re-engage pilot per Step 2.
- Install remaining torque converter to flywheel bolts. Refer to
Flywheel to Torque Converter Bolt Replacement
.
- Lower the vehicle.
- With the engine at idle speed and the transmission in PARK or
NEUTRAL, observe the vibration.
Refer to
Noise and Vibration Analysis
.
Repeat this procedure
until you obtain the best possible balance.
- Install the transmission converter cover bolts and the cover.
Refer to
Torque Converter Cover Replacement
.