PeterG
Well-known member
GM has issued its third update to the bulletin identifying the procedure and oil to eliminate the creaking positraction clutches in our differential units.
My 2007 started making the loudest and most-frequently occurring noise in any several Vette I have owned over decades. The noise started at around 2,000 miles and continued up to 4,500 miles.
My GM dealer's mechanic removed the factory fluid and replaced it with this new GM fluid. This fluid contains a built-in clutch additive and therefore does not need any additional additive.
My mechanic changed the fluid, drove a few figure-eights, and brought the car around to me.
I have not heard a sound -- not any noise -- from the differential !
I have now driven about 200 miles and there is not a sound when turning in any direction to any degree.
The fluid comes in GM-labeled black quart containers. I do not know the part number, but it is specified in the updated bulletin.
GM came through and made our C6s even more perfect!
My 2007 started making the loudest and most-frequently occurring noise in any several Vette I have owned over decades. The noise started at around 2,000 miles and continued up to 4,500 miles.
My GM dealer's mechanic removed the factory fluid and replaced it with this new GM fluid. This fluid contains a built-in clutch additive and therefore does not need any additional additive.
My mechanic changed the fluid, drove a few figure-eights, and brought the car around to me.
I have not heard a sound -- not any noise -- from the differential !
I have now driven about 200 miles and there is not a sound when turning in any direction to any degree.
The fluid comes in GM-labeled black quart containers. I do not know the part number, but it is specified in the updated bulletin.
GM came through and made our C6s even more perfect!