Im having some drive issues which I believe to be my tranny finally dying. I was wondering what kind of uprgardes should be done for a well used tranny offroad? I know it needs quick shifts to keep it cooler and a beefed up sun shell, but specifically what parts or where could I find a performance 4L60e? I was looking on ebay at a rebuilt towing 4l60e for $1100, but his responses say he takes like a month. Also what should I be looking at for price, ie does $1100 soundd good?