while stacy and i were riding atv's on sunday, stacy decided to take her truck through some mud. it shifted fine into 4hi but when she tried to put it into 4lo it made a clicking noise but wouldnt go into gear. she took it to the shop and the guy told her she had a crack in her t-case. how is something like this caused? he said it was stress related but from what? the new lift she put on it? im confused because she has never abused that truck offroad at all. is this common in '99 2 door tahoes with push button 4x4? the guy said a new t-case is about $1200, is this true? any comments would be appreciated. im pretty sure she is already getting it fixed in austin as im writing this but im still curious. the np203 that i bought for my blazer was only $250, was it so much cheaper because hers is push button or what?