I bought a shift kit for my '02 4x4 for fifty bucks. It was my friends who was going to install it in his truck. Not even a week after he bought it, his trans. took a crap on him. I haven't seen to many people that mess around with shift kits, everyone opts for the new valve bodies. My question is: Are shift kits not worth the effort?? Any tricks words of wisdom would be nice too. After reading the instructions I'm a little nervous. Drilling and grinding on my valve body kind of scares me. Any input is welcome. Thanks