The mach rear is no different than any other 8.8 rear from a mustang gt. When the adds say upgraded rear, they are referring to the fact that it has a 3.55 instead of the standard 3.27 found in the GT. Other than the gear, it is the same.HAMMER said:Jim,
All of the research that I have done indicates that there is no difference between the Mach1 live rear system and any other Mustang 8.8 solid axle rear.
Some advertisements and specs that I have seen on the Mach1 rear indicated "upgraded" or "redesigned" rear. So either the ads for the Mach1 are misleading or I have been given incorrect information about it.
First step is to find out if the Mach1 rear is, in fact, revised from prior Mustang live axles. If it is, a swap with the 03 is worth considering. If the Mach1 rear is no different from any 8.8 rear, I wouldn't hack up the brand new car. Just put a live axle in your 03 Cobra.