The 1st to 2nd shift is pretty bad, one might even describe it as violent, 2nd to 3rd is a little hard as well. I supposedly have a re built tranny but who knows. My father in law said for starters change the fluid and the filter. It was over a quart low on fluid when i bought it. Where the fluid had gone i dont know. It doesnt leak into the driveway or the transfer case. I dont think the fluid level has changed since i have owned it (several months) So any ideas???