Corvette V8-6.0L VIN U (2005)
Pressure Plate: Customer Interest
M/T - Clutch Pedal Won't Go to Up Position at High RPM
Bulletin No.: 05-07-31-001A
Date: August 17, 2005
TECHNICAL
Subject:
Clutch Pedal Does Not Return to Up Position During Shifts at High Engine RPMs (Inspect Date Code and Replace Clutch Kit)
Models:
2005 Cadillac CTS-V
2005 Chevrolet Corvette, SSR
with Tremec T56 6-Speed Manual Transmission (RPOs M10, M12, MM6, MZ6)
Supercede:
This bulletin is being revised to add the RPO MZ6 6-Speed Manual Transmission. Please discard Corporate Bulletin Number 05-07-31-001 (Section 07
- Transmission/Transaxle).
Condition
Some customers may comment that while shifting at engine speeds greater then 6000 RPMs, the clutch pedal does not return to the up position. As the
engine speed decreases, the clutch pedal will return to the up position.
Cause
It is possible that when the engine speed is greater than 6000 RPM and the clutch pedal is depressed, centrifugal loads on the clutch diaphragm spring
may be greater than the clutch return load from the diaphragm spring. This force created by RPM would be directionally opposite to the clutch bearing
force, causing a near net zero or less than zero return force. As a consequence, the clutch pedal may be stuck at the bottom of travel at the floor. Once the
engine speed reduces to less than 6000 RPM, spring return load dominates and the clutch pedal returns to normal function.
Correction
Inspect the clutch date code and replace the clutch kit if built PRIOR to the following date code:
^
4M21A/B/C for CTS-V and SSR
^
4M13A/B/C for Corvette