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Old January 25th, 2011, 01:08 AM   #1
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Rear End Question


hello, I have been looking at swapping rear ends and was wondering if a 79-93 and 94-98 rear can be used as a core, I know fox has 1'' shorter rear but do they bolt in
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Old January 25th, 2011, 01:24 AM   #2
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yes, it will bolt up.

these measurements i found here in mm:

- 1994-1998 Mustang rear axles are 3/4" wider on each side than a 79-93 Mustang.

- 1999 and newer Mustang rear axles are about 1 7/16" wider on each side than a 79-93 Mustang.

- 94 and newer Mustang 8.8 will bolt into a 79-93 Mustang but will require brake line adapters.

- Lincoln Mark7 LSC, SVO Mustang and Fox Body Saleens use a rear axle that is 1.25" wider per side than the 87-93 Mustangs.

- 94-95 spindles share the same track width as 79-93 spindles.

- 96 and up spindles have an 8mm wider track width.

- 79-93 Mustangs all use 9" drums with 7.5 and 8.8 rear axles.

- 4.0 liter Rangers use a wider 8.8 rear axle and 10" drums.

- Explorer 8.8 rear axles are 1" wider per side than a Ranger or Aerostar with a 7.5 rear axle.
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Old January 25th, 2011, 01:35 AM   #3
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thank you soo much, what would you recommend to build for a good core?
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Old January 25th, 2011, 01:40 AM   #4
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i would get the same 8.8 rear end that is correctly fitted for the year mustang you are going to put it in, 99-04 etc.. all ford 8.8 are very reliable.
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Old January 25th, 2011, 01:42 AM   #5
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I have a 01 GT, its a daily driver and I wanted to get a new one to start building for winter
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Old January 25th, 2011, 01:59 AM   #6
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too easy, grab a 99-04 8.8 from a mustang, junk yard, or wherever you can get one. if you get the correct year rear end you won't have any problems with the rear brake set-up vs a much older rear end where you would have to get the brackets for the calipers. see if you can't find a 03/04 mach 1 rear end, they come with the cobra brakes and brackets, better brakes for your build in the future.
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Old January 25th, 2011, 02:04 AM   #7
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where I live I have been finding nothing, I may just buy my 33 spline 26 spline input and locker and axles and just bang it out in a weekend, bullitt has cobra brakes too right?
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Old January 25th, 2011, 02:21 AM   #8
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tell me about it, i'm in the city.. and yes the bullitt does, forgot about that. good luck with the build.
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Old January 25th, 2011, 08:16 AM   #9
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I say get a budget rear end from either an F150 or explorer. they are both the correct width 8.8 and use 31 spline axles with upgraded diff that we need to work. thats what im about to go and explore in about 2 hours here in chicago and lets just say its not exactly warm either.....
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Old January 25th, 2011, 08:20 AM   #10
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Originally Posted by DsmDave View Post
where I live I have been finding nothing, I may just buy my 33 spline 26 spline input and locker and axles and just bang it out in a weekend, bullitt has cobra brakes too right?
Hey many did you try molts? A couple months ago there was a mustang that totaled in that area. Probably was taken to them.
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Old January 25th, 2011, 11:39 AM   #11
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I would go 96-98 if your into drag racing. Its 1/8" shorter on each side than the 99-04 making it nicer for tucking in slicks. Please click the how to swap SRA in my sig!!
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Old January 25th, 2011, 11:44 AM   #12
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Originally Posted by n03stang View Post
Hey many did you try molts? A couple months ago there was a mustang that totaled in that area. Probably was taken to them.
good idea, I totally forgot about molts,

I know that the explorer has to have the tow package for it to be a posi. Im looking to build a rear from sctrach with gears, spool possibly and even all axles, I just need a bare housing or if possibly id even take a 9''
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Old January 25th, 2011, 11:45 AM   #13
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Originally Posted by WhiteVenom View Post
I would go 96-98 if your into drag racing. Its 1/8" shorter on each side than the 99-04 making it nicer for tucking in slicks. Please click the how to swap SRA in my sig!!
thats the answer I was looking for! Im trying to tuck tires in so I can run a larger wheel. repped and clicked
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Old January 25th, 2011, 11:51 AM   #14
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No problem, any questions at all requarding the 96-98 swap let me know. Very straight forward and pretty easy. Everything will switch over. Things you will need are:

96-98 8.8
obviously 31 spline or whatever setup your going with
I would change the diff gasket to ensure no leaks and brand new fluid is nice
Keep your 99-04 calipers
Keep your rotors
Buy new brake pads just because your back there IMO
99-04 lower control arms! THAT IS IMPORTANT! 96-98 control arms are the same on the side that bolts to the axle but the side that bolts to the car is smaller. You need a 14mm not a 12mm. If you put 96-98 Lower control arms in it, it will have to much play and be catostphic!
All upper control arms are interchange 79-04 so anyones will work
Since your keeping your calipers dont worry about the brake lines! leave the calipers connected to them! Then you wont have to bleed/buy new fluid.

I think that covers mostly everything. Reps returned btw!
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Old January 25th, 2011, 11:55 AM   #15
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hanks man, yea im just gonna strip it and clean it up and do a budget build, the rotors and pads are good to know because I had no clue about that
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Old January 25th, 2011, 11:59 AM   #16
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yeah i had to edit that. Forgot you have a GT. For me it sucked because 99 cobra rotors are the same height but thincker so i had to get a full 94-04 GT setup for my rear brakes. You wont because you have it all already!
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Old January 25th, 2011, 12:07 PM   #17
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May i ask why your buying a new one though? If you have a SRA why not just take it out and build it? Or are you wanting the shorter axle advantage?
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Old January 25th, 2011, 01:34 PM   #18
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Originally Posted by WhiteVenom View Post
May i ask why your buying a new one though? If you have a SRA why not just take it out and build it? Or are you wanting the shorter axle advantage?
Mine is pretty rusty, I daily drive my car and was looking to build one as a side project so I wouldnt have downtime
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Old January 25th, 2011, 01:36 PM   #19
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I see..It would be cheaper to clean yours up. As you can see the one i got was pretty rusty. Wire brush it and spend some time cleaning it up. I took mine up to the power wash station, used my air tool with a wire brush and did alot of heavy duty chassis paint. If you just order all the parts and wait for them all to get there and get all your tools/plans ready, you could put her up on jackstands at 8, 9am and knock it out in one day!
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Old January 25th, 2011, 01:39 PM   #20
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this is very true, weekend project. Was this your first time doing one? how is yours holding up?
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