The K5 has been sitting for a long time, I've got it up for sale. Guy took it for a test drive a few days ago, everything ran fine. Today I was going too take it too the store and now it won't back up. I couldn't check forward because it's parked up against the bushes. Any ideas ?? If it's low on tranny fluid would that keep it from going into reverse ?? I checked the transfer case, it shifts fine into all gears. Damn it, I basicly got it sold, but I want to cure this problem before the new owner buys it. I can't sell it for my asking price if the tranny poops out. I'll probley have too drop my price if nothing else. I will be completely honest about it.