Hello all, new to the forums and had a question about a gear upgrade. I have a 96 Tbird sport, with trak-loc. I recently have been having an issue with the slipping/chattering in the rear end, I am assuming its worn out, or previous owner did not use friction modifier at last lube change! I have been reading up on posts on rear end swaps/upgrades, so i think it is time for me to give it a try. I bought a used pumpkin from the junkyard, with trak-loc and 3.27 gears, cleaned it up and it is ready to install. I figured while i have the new one sitting out.....might as well upgrade the gears before installing. I have been searching the internet looking for new/used gear sets. Is there a difference between any of the gear sets? some say they fit the tbird, mustang, or f-150........or does it matter as long as it says fits 8.8? Also, of course it would be smarter to by brand new, but has anyone had luck with used gears pulled from other vehicles for a cheaper price?