Ford 8.8 Swap

8.75 never came with discs, period. the imperial you are thinking of had an 8.25. the 8.75 can not be used with discs unless you change to the "green" ball bearing axle bearings. tons of info online about this.

28 vs 31 splines,as stated, is of no importance on a street car. rarely will you see anyone break either, they can handle a lot of power. 31 spline 8.8 rears are only in explorers and full size trucks, and a few of the FX4 rangers.

also as stated, there are lots of ways to get an 8.8 w8th discs. 87-88 turbocoupes came with either 3.55 or 3.73 posi disc rears, but were 4 lug. 84-92 Lincoln mark 7's came with 3.08 or 3.27 posi disc rears, and are 5 lug ford/dodge pattern. 94 and up mustangs are 5 lug rear disc rears, but only the GT anc cobras had 8.8's, the other mustangs got the 7.5. mustang 8.8 rears from 94 and up are typically 3.27's, but other gears are to be had. the problem with the mustang 8.8 is people think they are worth more than they are, especially for a transplant into a non-mustang.

explorers remain the best source of cheap, 31 spline rear discs with performance gear ratios.


to the guy who was bragging about having only spent $650 on his 8.75.....you made my point. $650 and you still have an open differential and 10" drums. if youre happy with it though, thats all that matters ultimately, isnt it? To me though, $650 would buy a used explorer rear, the spring pads to weld onto it, 2 new rotors, 2 new calipers, a new set of brake pads, new gear oil and additive, new ujoints, new brake lines, new clutch pack to rebuild the differential, and enough leftover to throw a nice bottle of bourbon down my neck after putting it in....