mark b

The reason I ask is my C5 manual gear box seems to always sound like Im stripping/grinding gears (especially into 4) just when I take it out to drive it after it is sitting for a few days, but after the second time or, lets say the second time I shift it into 3rd, its fine.. if I shift it real slow, it doesnt do it as much.. but 4th always does it...

is this normal with this tranny? otherwise its fine and shifts smooth.. and im not missing the shift, it just seems to me that the gear box needs some driving and shifting to warm it up and i just want to know if this is normal and others have had this experience..

thanks

froggy47

Try Redline d4atf

kmagvette

another big for Redline D4

mark b

so you think it is the tranny fluid that causes that? I was just driving it and it was better this time although I only got to third.. fourth always grinds the first time I shift into it.. I purposely short shifted and took my time with the shift into third and it was quiet dont have this problem with second gear

Ill flush the tranny fluid soon.. i dont think it is the fluid because it was changed recently.. but stock fluid

anyway im hoping everything is OK it seems to be it is just annoying

JeremyGSU

My transmission seems to shift notchy unitl warmed up. I used Amsoil Torque Drive.

C66 Racing

I use the AMSOIL Torque-Drive Synthetic Transmission Fluid (Product Code ATD1G) as well.

When was the last time you changed your tranny fluid? The stock fluid shears low out of grade very rapidly. The stock fluid in my CTS-V (T56 tranny) sheared low out of grade in about 10k miles. I'd try changing to a good synthetic for track use as the first step. If that doesn't help, then I'd start looking at the other common failure modes in the tranny.

Forum vendor RKT56 has a good discussion on the stock T56. I don't use his tranny's so this is not an endorsement one way or another, but I think he has a very good article on his website.
http://rkt56.com/why-upgrade/