I just bought a TCI streetfighter TH350 with B&M holeshot 3000stall 10in converter for my 420hp 355 camaro. I'm running royal purple ATF and I'm running throught the stock tranny cooler and a aftermarket cooler too. The TH350 was working great and shifting awesome. When you first drive the car and everything is a bit on the cool side(engine,tranny) and you hammer it, the transmssion works great and shifts good.When you drive around town for a half of a hour and you hit it the tranny seems too kinda lock up, it doesn't slip slip, almost like it's stalling but at 5000-6000rpm? I raced a nitrous camaro one night, it took us 10 minutes to drive out to race. I was driving below my stall. The first race was embarrasing. I left the line the engine and car was moving, about 4000rpms the tranny seem to kinda locked up, when it did it, the engine couldn't revved passed the 4000rpms. The tranny does it when drive around for a bit and does it at a higher rpm at full throttle, I check the fluid it was quart low(the other night it was full)the fluid didn't smell burnt or anything. I added a another quart of the same royal purple ATF. The car cooled down I took out on a open road and nailed it and everything worked great. I drove it around town for 20minutes and nailed it and it did the same slipping lock up thing!. when i park the car theres is no fluid left on the ground. I don't have tranny temp guage i will get one. I don't see how is getting hot i have the fluid running throught the radiator and the cooler. I worried that the TH350 is getting damaged everytime it has it's spells. Does anyone know whats going on? or have suggestions?