Rear End Swap-help!!

red92lx · 02-18-2004, 12:00 PM

I HAVE AN 85 MUSTANG GT-OF COURSE WITH THE 7.5 IN REAR DIFF. IT IS SHOT! I WANT TO UPGRADE. DOES ANYONE KNOW IF THE 94-99 REAR DIFF WILL FIT PHYSICALLY-LIKE THE CONTROL ARMS AND THE WIDTH OF THE HOUSING-I KNOW THE AXLES ARE 5 LUG AND IT WOULD PROBABLY HAVE ABS-AND THAT IT WOULD HAVE DISC BRAKES. ANY OTHER SUGGESTIONS ON REPLACING THE WHOLE UNIT BESIDES USING THE STANDARD 8.8 IN OR BESIDES USING AN AFTERMARKET UNIT-I.E. MOSER.I AM TRYING TO KEEP THE COST AS LOW AS POSSIBLE-JUST A STREET CAR/TOY. THANKS FOR ANY HELP. YOU CAN EMAIL ME AT getmoreinfofromme@yahoo.com JEREMY

QuantumMotorsports · 02-18-2004, 03:15 PM

I believe the 94 and later rears are wider than the 93 and earlier. I have been told they are the same size as my turbo coupe rear which is like a half inch wider on each side. But, it would bolt up and you could probably get the brakes figured out. You could look for a rear end at a pull apart yard (if you have any near you) get a rear end from a mustang or capri preferably, but a cougar/t-bird/lincoln 8.8 from 83-88 will bolt up.

sedanman · 02-18-2004, 06:48 PM

Option 1. Buy a used 8.8 out of a 86-93 GT its the best option and it bolts right in.

Option 2 if you use a SN95 rearend it is wider by (I beleive 1.5") it can cause offset issue with some wheels. They have disc brakes and this means you have to swap mastercylinders and booster (to do it right) and fab up the E-brake. You will also have five lug on the back then, which means you have to upgrade to five lug in the front and get all new rims.

For what you want option 1 would be the easiest and the most cost effective.

Good luck!

red92lx · 02-18-2004, 08:02 PM

THANKS TO BOTH OF YOU GUYS. YEAH- I WOULD LIKE TO USE THE 94-UP REAREND AND CONVERT TO 4 WHEEL DISC-I JUST WONDER IF THE CONTROL ARMS AND MOUNTS WILL FIT MY 85--I READ THE ARTICLE ON THE FRONT PAGE ABOUT USING PARTS OFF OF A SUPER COUPE T-BIRD, BUT BEFORE I INVEST TOO MUCH, I WOULD RATHER JUST BUY A CURRIE OR STRANGE NEW ASSEMBLY THAT IS BEEFED UP AND READY TO GO--I TELL YA, MUSTANGS ARE SUCH MONEY PITS!! I GUESS THAT'S THE FUN OF IT!

moosejaw · 02-18-2004, 09:37 PM

Only the axles are longer, the housings are the same width (when comparing mustangs).

Mike

02-18-2004, 12:00 PM	#1
red92lx Registered Member Join Date: May 1999 Location: RIVERSIDE OH 45424 Posts: 16	Rear End Swap-help!! I HAVE AN 85 MUSTANG GT-OF COURSE WITH THE 7.5 IN REAR DIFF. IT IS SHOT! I WANT TO UPGRADE. DOES ANYONE KNOW IF THE 94-99 REAR DIFF WILL FIT PHYSICALLY-LIKE THE CONTROL ARMS AND THE WIDTH OF THE HOUSING-I KNOW THE AXLES ARE 5 LUG AND IT WOULD PROBABLY HAVE ABS-AND THAT IT WOULD HAVE DISC BRAKES. ANY OTHER SUGGESTIONS ON REPLACING THE WHOLE UNIT BESIDES USING THE STANDARD 8.8 IN OR BESIDES USING AN AFTERMARKET UNIT-I.E. MOSER.I AM TRYING TO KEEP THE COST AS LOW AS POSSIBLE-JUST A STREET CAR/TOY. THANKS FOR ANY HELP. YOU CAN EMAIL ME AT getmoreinfofromme@yahoo.com JEREMY __________________ THANKS-JEREMY BTW-I WORK AT A FORD DEALERSHIP-SO ANY PARTS NEED? LET ME KNOW--PLEASE KEEP THE YEAR-80-CURRENT-THE OLD STUFF IS A PAIN TO LOOK UP AND IS PROBABLY DISCONTINUED ANYWAYS. THANKS. PREVIOUS/CURRENT MUSTANGS 92 LX 5.0L A.T CONV. 00 GT COUPE-5SPD 89 LX NOTCH 5.0L A/T 85 GT T-TOP 5-SPD

02-18-2004, 03:15 PM	#2
QuantumMotorsports Registered Member Join Date: Jul 2000 Location: Norman, Oklahoma, USA Posts: 597	I believe the 94 and later rears are wider than the 93 and earlier. I have been told they are the same size as my turbo coupe rear which is like a half inch wider on each side. But, it would bolt up and you could probably get the brakes figured out. You could look for a rear end at a pull apart yard (if you have any near you) get a rear end from a mustang or capri preferably, but a cougar/t-bird/lincoln 8.8 from 83-88 will bolt up. __________________ Michael Black QuantumMotorsports Norman, OK 1984 LX Hatch 306 w/ TRW forged flat toppers, Comp Cams Magnum 292H, GT40P heads w/ 3 angle valve job, .550 lift springs, Angus Racing Roller Rockers, Weiand Stealth Intake, Holley 4150 650cfm carb, MAC 1 5/8 Long Tubes, Single Chamber Flowmasters, 91' T5 w/ Pro 5.0 shifter, Turbo Coupe 8.8 Rear w/ 3.55 gears, QA1 Motorsports tubular K member, no interior except steering wheel and seat. Coming soon: 6 or 8 point cage, Fuel Cell, Weld Draglites

02-18-2004, 06:48 PM	#3
sedanman Registered Member Join Date: Feb 1999 Location: Indianapolis, IN Posts: 963	Option 1. Buy a used 8.8 out of a 86-93 GT its the best option and it bolts right in. Option 2 if you use a SN95 rearend it is wider by (I beleive 1.5") it can cause offset issue with some wheels. They have disc brakes and this means you have to swap mastercylinders and booster (to do it right) and fab up the E-brake. You will also have five lug on the back then, which means you have to upgrade to five lug in the front and get all new rims. For what you want option 1 would be the easiest and the most cost effective. Good luck! __________________ 04 Screamin Yellow Cobra KB 2.4 (585/556 pump 626/666 race) 00R brakes, DFX clutch, Level 5's, return fuel system, Lts with 3" exhuast, FR500 wheels and all the other fun stuff. GONE 1991 Lx sedan 5.0, 5spd (Liberty proshifted TKO) S-trim, Ported TF heads everything parted out.

02-18-2004, 08:02 PM	#4
red92lx Registered Member Join Date: May 1999 Location: RIVERSIDE OH 45424 Posts: 16	THANKS TO BOTH OF YOU GUYS. YEAH- I WOULD LIKE TO USE THE 94-UP REAREND AND CONVERT TO 4 WHEEL DISC-I JUST WONDER IF THE CONTROL ARMS AND MOUNTS WILL FIT MY 85--I READ THE ARTICLE ON THE FRONT PAGE ABOUT USING PARTS OFF OF A SUPER COUPE T-BIRD, BUT BEFORE I INVEST TOO MUCH, I WOULD RATHER JUST BUY A CURRIE OR STRANGE NEW ASSEMBLY THAT IS BEEFED UP AND READY TO GO--I TELL YA, MUSTANGS ARE SUCH MONEY PITS!! I GUESS THAT'S THE FUN OF IT! __________________ THANKS-JEREMY BTW-I WORK AT A FORD DEALERSHIP-SO ANY PARTS NEED? LET ME KNOW--PLEASE KEEP THE YEAR-80-CURRENT-THE OLD STUFF IS A PAIN TO LOOK UP AND IS PROBABLY DISCONTINUED ANYWAYS. THANKS. PREVIOUS/CURRENT MUSTANGS 92 LX 5.0L A.T CONV. 00 GT COUPE-5SPD 89 LX NOTCH 5.0L A/T 85 GT T-TOP 5-SPD

02-18-2004, 09:37 PM	#5
moosejaw Registered Member Join Date: Apr 1999 Location: St.Louis,MO Posts: 274	Only the axles are longer, the housings are the same width (when comparing mustangs). Mike __________________ Live near St.Louis? Check out Mustang Muscle and Dyno in High Ridge, MO

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
rear end swap ?	87gt17815	Windsor Power	2	04-11-2003 02:57 PM
rear end swap question	stock89	Windsor Power	4	02-25-2003 12:56 AM
independent rear suspension swap	Datsun	Modular Madness	2	02-23-2003 10:46 PM
9" rear end swap questions - Please respond	2FastLX	Windsor Power	2	08-21-2001 01:31 PM
GT to LX 5.0 rear bumper swap	93GTDIN	Windsor Power	2	03-20-2001 10:23 PM