Supporting Vendors / Dealers - Advertising - Shop

2005 - 2007 Corvette: Service Bulletin: Intermittent Spongy Clutch Pedal Sticking To The Floor During Hard Acceleration And High RPM Shifts

Document ID# 1982105

Subject: Intermittent Spongy Clutch Pedal Sticking To The Floor During Hard Acceleration And High RPM Shifts - keywords contaminate fluid hydraulic #PIP4145 - (06/04/2007)

Models: 2005-2007 Chevrolet Corvette, Corvette Z06 Equipped with a Tremec 6-speed Transmission RPO MM6, MZ6


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Some customers may comment about an intermittent spongy clutch pedal feel or clutch pedal sticking to the floor. This may be aggravated by aggressive driving and high clutch operating temperatures. 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 these conditions are present the driver may lose customary clutch pedal feel and performance.

If the above condition is intermittent flush the hydraulic system using DOT 4 fluid part number 88958860 (88901244 in Canada), prior to replacement of any mechanical or hydraulic components.

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 servicing the cap should not be opened for just an inspection.

DOT 4 clutch fluid has a 2 week shelf life. Do not use fluid if container opening date is unknown or older than 2 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 2 calendar years. Please flush and replace the clutch fluid with P/N 88958860 (88901244 in Canada) or equivalent DOT 4.

The current service information and owners manual will be updated to reflect this information.

Note: If the concern is not intermittent, inspect clutch hydraulic system for leaks and repair as necessary after repairs are completed flush system with DOT 4 fluid part number 88958860 (88901244 in Canada).

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.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

0 (0)
Article Rating (No Votes)
Rate this article
Attached Files
There are no attachments for this article.
There are no comments for this article. Be the first to post a comment.
Security Code Security Code
Related Articles RSS Feed
1993 - 2005 Corvette: Service Bulletin: No Reverse, Second Gear or Fourth Gear (Replace Reaction Sun Shell with More Robust Heat Treated Parts)
Viewed 1183 times since Wed, Jul 23, 2014
2005 - 2007 Corvette: Service Bulletin: Information on Driveline Clunk Noise When Shifting Between PARK and DRIVE, PARK and REVERSE or DRIVE and REVERSE
Viewed 2094 times since Mon, Jul 14, 2014
2005 - 2007 Corvette: Campaign: Removable Roof Panel
Viewed 1429 times since Fri, Jul 4, 2014
2007 Corvette Z06: Dealer Bulletin: Addition Of Optional Z06 Chrome Wheel
Viewed 935 times since Tue, Jul 15, 2014
2005 - 2006 Corvette: Service Bulletin: 2005-2006 Chevrolet Corvette Including Z06 Repair Procedure for Painted Roofs that may separate
Viewed 3704 times since Sun, Jul 20, 2014
2005 - 2006 Corvette: Service Bulletin: Manual Transmission Operating Characteristics
Viewed 1043 times since Sun, Jul 13, 2014
2006 Corvette: Service Bulletin: 6L80 Automatic Transmission Delayed Engagement From PARK to DRIVE or PARK to REVERSE (Reprogram Transmission Control Module (TCM))
Viewed 5828 times since Tue, Jul 15, 2014
2006 - 2012 Corvette: Service Bulletin: #PI0773: Diagnostic Tips for DTC P0796, Slip or No 4th, 5th or 6th Gear - (Jul 25, 2012)
Viewed 349 times since Sun, Mar 19, 2017
2005 Corvette: Service Bulletin: Malfunction Indicator Lamp (MIL), Diagnostic Trouble Code (DTC) P0833, Cruise Control Inoperative (Adjust Clutch Release Switch)
Viewed 4152 times since Fri, Jul 18, 2014
2006 Corvette Z06: GM TechLink: Car Wash - Tire Fitment
Viewed 767 times since Thu, Jul 17, 2014