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| 2005 - 2009: Service Bulletin: Clutch Hydraulic System -- New Service/Owner Maintenance Information |
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2nd of December, 2011
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#07-07-31-001A: Clutch Hydraulic System - New Service/Owner Maintenance Information - (Sep 11, 2008)
Subject: Clutch Hydraulic System -- New Service/Owner Maintenance Information
Models: 2005-2009 Chevrolet Corvette (Including Z06 and ZR1) with Tremec 6-Speed Manual Transmission (RPOs MM6, MZ6, MH3)
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This bulletin is being revised to update the models to 2009. Please
discard Corporate Bulletin Number 07-07-31-001 (Section 07 --
Transmission).
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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.
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This Knowledgebase has been developed to cover the most frequently asked questions about Corvettes. Using our system, you can search for topics separated into categories by Corvette generation. Some of the information here comes directly from Chevrolet Service News publications, Service Bulletins, Recall Notices and other technical sources as indicated.
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