I was at Quadratec warehouse to pick up some jeep gear and i asked that age old question about 4.0 v 2.5...i know that the 4.0 is great...and i regret not getting one. The man at the counter said that the 2.5 can do anything that the 4.0 can do if its geared right. now ive heard all one sided stories about 2.5 v 4.0...like 2.5 is great or 2.5 is awful. so anyway on to the question...how do you gear it different? is that like a new transmission or what? and some good kits to get to do this maybe? im not sure...please help if you can. thanks!