Well I finnally got the car tuned thursday and it ran great all day after the tune. Last night i go to take the car out and as im headed into town the trans decides the slip out of overdrive. well it gets progressivly worse to the point where the car barely wants to move down the road without me ramping up up like crazy. Almost didnt get it home. As far as i can tell its because the converter wont lock up. Trans is a brand new 4l60e from monster with less just over 500 miles on it already, converter is a yank 3600 stall. Running 24x ls1 management on an lt1. Thoughts, Ideas? im lost and dont know where to start

 

I would suggest calling the folks you bought the transmission from. It sounds like it's hurt. If it won't pull then the problem is not the converter locking up.

g