Thanks for the replies, I have the 4l60e 4 speed. I bought the truck new and have about 20k on it now. When pulling the boat or our 57 on the trailer right now it is border line and if I go to a 33 I didnt want to stress the drive train that much. I also wanted the performance bennifits of the steaper gear. I ran it through a calc and looks like 4.56 with 33s should put me about 2200 rpm at 70mph wouldn't be to bad. I don't use the truck as a commuter and a 4.10 was listed around 2000 at 70 mph.