Jasonoff

So I think this stuff killed my tranny. I don't believe it could take the track temperatures.

2nd run session of the day at beaverun on my 4th or 5th hot lap down the front straight, hard braking from 105mph rev match to 3rd... Won

Balzz

Though I'm tracking a different car, I had the same fluid in my car over the weekend at the track. In the afternoon sessions, my tranny definitely started feeling like crap and I had some trouble getting into gear occasionally. I'm getting this fluid out of the tranny before my next time on track. Thumbs down from me as well.

Jasonoff

I just hope I didn't cause any damage driving home with tight gears and grinding here and there.

vtec9

yack sounds pretty nasty. please update us when you swap out the fluid. If that crap turns out to be part of the cause, I'm sure a lot of people, incluidng myself, will get rid of it ASAP even if they don't track the car.

Jasonoff

It was great on the street and autox. Seemed to even get better as the days went by.

It didn't take long until it was absolute garbage on the track.

oakfloor

If you track your car, and its a hot day. you need to change it more often. or use redline MT-90. this stuff works great ohterwise IMO

Jasonoff

It wasn't hot outside.

I plan to swap out with honda mtl for a few days then try a mixture of Redline MTL and MT-90.

darkfx

How long was the GM in your tranny?

Jasonoff

I don't have my book on me so I would guess about 4-6 weeks.

David1

It is not the fluid. I have bean using The GM syncromesh stuff for years including the S for 4 1/2 years. I have alot of auto x time on this stuff and 600 miles on it at Beaverun and Dragon runs etc. My trans is like butter even when hot. If you can not get the trans to move from gate to gate, you have a mechanical issue. More than likely your clutch is not fully releasing. No amount of rev matching will help in this case. Try bleeding the clutch fluid. I have seen many S's that would not shift properly due to poor fluid condition/or low and bad clutch master cylinders. If the clutch master is bad internally, you think you have a full stroke of the pedal, but some of the fluid goes by the piston. Look under the dash where the clutch pedal rod goes to the master and look for for fluid leakage.