| Subject: | Clunk Noise When Shifting More Noticeable at Low Speeds |
| Models: | 2004-2007 Cadillac CTS-V |
| 1997-2007 Chevrolet Corvette |
| Equipped with a Tremec 6-speed Manual Transmission |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
While driving in a steady slow speed parade type situation a clunk-clunk noise from the driveline may be heard when depressing and releasing the clutch pedal, between shifts or quickly depressing and releasing the throttle.
Recommendation/Instructions:
The noise is a normal torque reversal in the driveline and a combination of axle backlash, front and rear drive shaft rubber isolation flanges, drive shaft center support, and a dual mass flywheel all working together. This is a normal characteristic and
not a condition of operation concern. No repairs should be attempted.
Also reference the latest version of TSB 03-07-29-004 for further manual transmission operating characteristics.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
