I have an 08 Cobalt with an auto tranny and i was wondering how much hp i can run before i need a new trans thanks
um noI know someone that had close to 600whp on a stock f35 trans twin disc clutch no problems. I also know someone that was running 400whp on an lnf and blew his tranny to pieces during a 5krpm roll in 3rd gear no launching. different final drive gear may have had something to do with it. it's all how you maintain it and the driver.
the auto's will supposedly take more power than manual.
I second this.the auto can handle 300 tq max, i wouldnt recommend going over 250 tq and 300 hp, or you will risk failure, note any upgrade in hp/tq will speed up the destruction of the transmission but with the proper preparations the transmission can handle anything our engine can put off, if you wish to go above 250tq or 300 hp, a new torque converter trans mounts and a trans cooler would be the easiest upgrade, bringing u up to about 400 hp b4 something else fails everything u need to know about our transmission is found here. and yes the stock auto handles more than the stock manual (250tq b4 clutch fail) and with proper tuning a automatic is always faster than a manual because u take driver error out of the picture. http://gmtunersource.com/index.php/racertech/ecotec-build-book