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2005 C6 transmission, 6th gear

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Old Aug 20, 2025 | 09:38 AM
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Default 2005 C6 transmission, 6th gear

2005 C6 6speed jumps out of 6th gear when in cruise going down hill or throttle backs off. Any thoughts ?
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Old Aug 20, 2025 | 10:51 AM
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Sounds like worn fork pads or some other part of the shift linkage. You probably have to open it up to see what the issue is.
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Old Aug 21, 2025 | 11:15 AM
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Could be shifter coupling has come loose, and shifter just needs to be reindexed when coupling it tightened back up/box to TT is tightened back up if worn out shifter box bushings, but does sound more like something in trans the problem instead.
Maybe, hence just check the shifter detent bolt on the shifter to see if someone did an anti venom mode by adding a brass washer to it, and if found and running stock shifter, then remove it so detent is back to normal tension.

Take a read through theses, since may have had after market shifter, was pulled to put oem back in ,and either did not use loctite on coupler bolt with correct torque to hold it in place (may need to replace the box grommets if falling apart and box moving on TT), or did the reduced detent tension mod of the trans detent for after market shifter, and the brass shim needs to be removed now with oem shifter back in the car.

https://www.corvetteforum.com/forums...-question.html

https://www.corvetteforum.com/forums...-look-vid.html
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