Mine was 2wd while I waited for new dog bones and yeah it ran like a mental sheep. It spun out and really was not an enjoyable time, I got the new dog bones and packed out the axel and diff cups with nitro tube. I put slightly more in the diff cups than in the axel as the axle was the place it was popping out from when I did a tight reverse turn, took me a while to get the right amount in there but I ended up with about 2mm of movement and now it works great