This may be the cause and worth looking into.
Clutch Hydraulic System New Service/Owner Maintenance Information
TECHNICAL SERVICE BULLETIN
Reference Number(s): 07 07 31 001C, Date of Issue: July 14, 2010
Affected Model(s): 2005 2011 Chevrolet Corvette (Including Z06 and ZR1)? Equipped With Tremec 6 Speed Manual Transmission (RPOs MM6, MZ6, MH3)
Supercedes: This bulletin is being revised to add the 2011 model year.
Please discard Corporate Bulletin Number 07 07 31 001B (Section 07 Transmission/Transaxle).
Superceded Bulletin(s): 07 07 31 001B, Date of Issue: July 13, 2009
Related Ref Number(s): 07 07 31 001, 07 07 31 001A, 07 07 31 001B, 07 07 31 001C
This bulletin is being issued to provide dealers with additional information
on servicing the clutch hydraulic system. Please also advise customers
of this new maintenance information.
Some cases have been found where the vehicle's clutch hydraulic system
was contaminated with water. Higher than expected levels of water in the
clutch fluid greater than 2% may cause the clutch fluid to boil. The presence of
water in the fluid lowers the boiling point significantly? When this occurs,
the driver may lose customary clutch pedal feel and performance.
To eliminate the opportunity for moisture to enter the clutch hydraulic system:
? The clutch fluid level inspection should be a VISUAL inspection only.
Look through the transparent reservoir and observe the fluid level.
Avoid removing the cap. DO NOT remove the cap just to top off clutch fluid.
Leave the system closed and sealed.
During PDI inspection or routine service, the cap should not be opened for
just an inspection.
? Open containers of DOT 4 clutch fluid have a two week shelf life.
DO NOT use fluid if the container opening date is unknown or older than two weeks.
DO NOT mix or re use old fluid. Current service information
already covers the issue of reuse.
? To provide the best clutch operation, it is recommended that the owner change
the clutch fluid every two years.
Please flush and replace with P/N 88958860 (P/N 88901244 in Canada)
or equivalent DOT 4.
Tuesday, November 8th, 2011 AT 12:53 AM