6 Speed Shifter Rattle Growl Buzz Noise - keywords control shake shift
| Subject: | 6-Speed Shifter Rattle Growl Buzz Noise |
| Models: | 1997-2007 Chevrolet Corvette |
| Equipped with a Tremec 6-Speed Manual Transmission RPO M12, MM6, MN6, MZ6 |
This PI is being superseded to update model years and add a component. Please discard PIP3104B.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Condition 1. 1997-2004 Corvette:
Shifter buzz noise at approximately 3000 RPM.
Condition 2. 1997-2007 Corvette:
Gear rattle or buzz noise at low RPM (below 1500 lugging the engine) or during engine shut down. Also neutral gear rattle noise with the transmission in neutral and the clutch engaged. These noises may be worse with the air condition compressor engaged.
Recommendation/Instructions:
Condition 1. 1997-2004 Corvette:
A revised shifter assembly with added isolation bushings is available as part number 10331311. Part numbers are subject to change so please use any updated part numbers if any become available.
Condition 2. 1997-2007 Corvette:
Gear rattle or buzz noise at low RPM (below 1500 lugging the engine), during engine shut down or also neutral gear rattle noise with the transmission in neutral and the clutch engaged are all normal operating characteristics of the 6-speed transmission. No repair attempts should be made on these conditions. Please refer to the latest version of informational service bulletin 03-07-29-004 which discusses normal operating characteristics of manual transmissions.
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.
