I have a 2000 silverado 4x4 with 163,000 miles. One day I took off from a stop sign and when the truck shifted to second it went "BANG". Now there is no reverse and I've read that there isn't a 2 or 4 gear. I'm pretty sure the sunshell went bad in it. I was wondering if anybody could tell me how easy it is to replace the sunshell. I don't mind having to take the transmission out, I just want to know what I'm gonna have to go through to replace it. I just want to know if anyone has any diagrams of the transmission or any other suggestions on what I should do. Thanks!!