Hey guys ive got a 1999 mustang V6 shes got 235000 somethin miles on her ive already replaced the transmission, but the rear end is making a whining noise and i had a guy who does alot with mustangs tell me its the carrier berrng going bad, Ive had my car up on a car lift and took the cap off and felt inside the rear differential and theres metal shavings. I went and bought the rebuild kit from AA for 75 but then the shop told me it would cost at least 300 for him to replace all the berings and rebuild it with the kit ive got. On the other hand i know at the nearby pull a part they have a 1995 mustang GT with the 8.8 rear end and im thinking its going to be better and cheaper to upgrade to the 8.8 rather than rebuild the 7.5 that came with the car, i believe my car had 3.27 gears and the 8.8 one on the 95 will have 3.08 how will these compare and will the 8.8 bolt on to my car or is there anything i need to replace?? Does anyone have a guide on doing this?? Thanks again guys