swapping the rear from the 90 into the 64?

**fast64** · **swapping the rear from the 90 into the 64?**

The 90 has a bullet proof posi rearend with 3.73 gears while the 64's rear is a who-knows-what POS open diff. with who-knows-what gears and a puddle of fluid under it. so my question is - can I swap rearends and how hard would it be if its do-able?

Fishers Stang · 11-15-2004, 08:58 PM

your SSP had 3.73 gears?

**fast64** · 11-15-2004, 10:05 PM

yup. i think ssp's came from the factory with 3.08's though

Fishers Stang · 11-15-2004, 10:29 PM

o ok, I have a set of 3.27's ina box, buddy of mine went to a 3.73's in his 99 SCGT,

**SpectorV** · 11-15-2004, 11:21 PM

i belive your 64 has leave springs you may can swap the components and keep the hulls where they are....

**fast64** · 11-16-2004, 06:25 AM


Quote: Originally Posted by SpectorV i belive your 64 has leave springs you may can swap the components and keep the hulls where they are....

yup, 64 is leaf.

DanzCherry68 · **Re: swapping the rear from the 90 into the 64?**


Quote: Originally Posted by SpectorV i belive your 64 has leave springs you may can swap the components and keep the hulls where they are....

You do not mean the housing? The 66 is an 8inch and the 90 is a 8.8. There was a 7 1/2 in the family somewhere, but I think it was on V-6's They do make kits to do a 8.8 to a classic platform, which is really inexpensive if you compare to the 9 inch. You can pick up an SN-95 with disc brakes and save money on a rear disc swap.

Kiljosh · **Re: swapping the rear from the 90 into the 64?**

I would think with some very careful measuring and precise cutting/welding it wouldnt be too hard. Guys in Jeeps do it. Of course going from leaf to coil is a major thing. Dunno.

12second5.0 · **Re: swapping the rear from the 90 into the 64?**


Quote: Originally Posted by DanzCherry68 You do not mean the housing? The 66 is an 8inch and the 90 is a 8.8. There was a 7 1/2 in the family somewhere, but I think it was on V-6's They do make kits to do a 8.8 to a classic platform, which is really inexpensive if you compare to the 9 inch. You can pick up an SN-95 with disc brakes and save money on a rear disc swap.

I have heard the best route to go is using the explorer rear end.You end up with an 8.8 that usually has the desirable gears plus it's a 31 spline