In my '78 k5 I have a prob with the tcase jumping out of L-Loc, leaving me in 2wd. This past weekend I was running a little freindly competition event, and during the "Hillclimb" it popped outta 4wd and the rear end came around, leaving me sideways on the hill! I managed to kick the lever back into L-Loc and continue on up. But, it was kinda scary for a bit! I also ran the rock Garden flawlessly in 2wd without knowing it! I hear this is a common prob, but what can be done? Thanks.