I'm getting a stock 4L60E rebuild. How durable will this be. I don't drive like a nut around town, and I plan to run time shots at the track, to bring home timeslips and improve the times. Is this going to kill this transmission with a shift improver kit installed by the guys who are rebuilding my transmission? Please tell me what I have to expect with the life of this newbe transmission.

Btw-There is also going to be a cooler on it too.

 

if you are running close to stock, you should'nt have too many problems. Anything else will destroy the 4L60E. I've burnt 3 of them with the most recent one exploding my converter. Not a pretty site. These transmissions were not meant to take very much power. TRUST ME!