Chris said it's ok... just be easy on it. I use mine to haul scrap metal on occassion and I've gone past the 4k by a few hundred pounds.

I'm also running the 40k cooler and the trans never got over 140... it's only a 10 mile drive to the scrap yard.

 

I didn't realize before but my truck now is stalling at 2000 stock, so 3200 sounds good the hell with towing the wifes Acadia can tow 5000 lol

 

Whats it flash to with that load??