[Chris B.]

I'm planning to get 3.55 rear end gears swapped in over the winter. While the rear is apart, I'm either going to have the stock clutch pack LSD rebuild with the GT500 carbon fiber discs or have a Detroit Truetrac Differential installed.

I really wanted to put in the Quaife LSD, but its currently out of production for the 31 spline 8.8" Ford rear end and it would take 15 pre orders for the US distributor to put it back in production. There probably would be a minimum of a 3 month wait after the pre orders are all paid before anyone sees their differential. Its hard to get 15 Mustang owners to part with $1400 for a differential in this economy. The Torsen T2R diff looks good, but many people have been having issues with them in Mustangs and Camaros. The housing breaks or the diff wear out prematurely. Many people have reported the diff acting like an open diff and large amounts of metal shavings in their diff. The Eaton Posi LSD is a good differential, but lately people have been breaking them in Mustangs too. The only time Truetrac diffs seem to break in the Mustang is when its an 11 second or faster car that is launched hard on slicks. Since I'll never be launching my car on slicks I don't have to worry about that.

I'm also looking at swapping out my rear lower control arms. The ones I have now are just regular urethane bushings and they have high roll stiffness. The rear end doesn't feel as planted during transitions on some tracks as my previous mustang did. My '08 had rear lower control arms that had a spherical bushing which had lower roll stiffness.