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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
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Drivetrain 86 Differential Into 94gt

  • Thread starter Thread starter dubbsix
  • Start date Start date Feb 12, 2014

dubbsix

Member
Oct 18, 2006
347
2
19
Katy,TX
Feb 12, 2014
#1
  • Feb 12, 2014
  • #1
I have a 86 8.8 read end that I have built and now want to put under my newly bought 94 gt. Will the 86 differential work with the 94 ?

Thanks
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
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Feb 12, 2014
#2
  • Feb 12, 2014
  • #2
@Mustang5L5
 

dubbsix

Member
Oct 18, 2006
347
2
19
Katy,TX
Feb 12, 2014
#3
  • Feb 12, 2014
  • #3
?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,265
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Feb 13, 2014
#4
  • Feb 13, 2014
  • #4
Short answer....yes


However, what brakes are on the axle? If drum brakes, that may require some additional work
 

revhead347

Apparently my ex-husband made that mistake.
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Feb 13, 2014
#5
  • Feb 13, 2014
  • #5
The differential chunk is the same. It should be remeasured and re shimmed in a new housing.

Kurt
 

95opal

5 Year Member
Nov 16, 2004
449
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Feb 13, 2014
#6
  • Feb 13, 2014
  • #6
yeah it will fit .. personally Id just swap the 94 axles and brakes over to the 86 diff and housing, if the 86 hasn't been converted to 5 lug disk already. JFYI the housings are identical its just the axles are shorter in the fox housings
 

dubbsix

Member
Oct 18, 2006
347
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Katy,TX
Feb 14, 2014
#7
  • Feb 14, 2014
  • #7
95opal thanks. I plan on doing just that. Pull out the axles and slap them into the housing.
 

dubbsix

Member
Oct 18, 2006
347
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Katy,TX
Feb 14, 2014
#8
  • Feb 14, 2014
  • #8
if I can squeeze 400hp out of my setup will the 28 spline axles hold up?
 

94Blue302GT

Member
Oct 20, 2003
704
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Chicago
Feb 14, 2014
#9
  • Feb 14, 2014
  • #9
Maybe...
but if you have it out, swap em.
I had over 500 hp for 15 seconds and they held up fine LOL
Swap your axles and such for the rear end and it'll work. Go with the 5 lug and upgraded brakes.
 

dubbsix

Member
Oct 18, 2006
347
2
19
Katy,TX
Feb 14, 2014
#10
  • Feb 14, 2014
  • #10
The problem is that I just rebuilt a 28 spline carrier for the 8.8 and would have to start all over and buy a 31 spline setup. This is not a track car so I won't be launching hard on slicks.
 

revhead347

Apparently my ex-husband made that mistake.
20+ Year Stangneter
Jun 14, 2004
9,302
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Feb 21, 2014
#11
  • Feb 21, 2014
  • #11
I've had 28 splines in my car since 1999. I probably have about 50 passes on it with slicks. Most of them were on motor with about 400hp. Everything is going to break eventually, but if you are not going to run slicks you are definitely going to be fine with 28 splines.

Kurt
 

dubbsix

Member
Oct 18, 2006
347
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Katy,TX
Feb 22, 2014
#12
  • Feb 22, 2014
  • #12
Thanks rev.
 
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