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suggestion on reduilding rear end, change axles?

  • Thread starter Thread starter 1993whtstang
  • Start date Start date Aug 14, 2011

1993whtstang

Member
Aug 2, 2011
146
5
18
Massachusetts
Aug 14, 2011
#1
  • Aug 14, 2011
  • #1
I was going to be installing a set of 3:55 gears in my 1993 mustang gt with 68,000 miles.

I was also going to install new bearings and a new traction loc differential. My question is should I change the axels to 31 spline from the stock 28 spline? When I am done putting my aftermarket bolt ons in I might be running close to 300 hp. I do not race it ,I just drive it when I get the chance and on weekends. Do I need to spend the extra money and change everything to 31 spline, or can i keep the stock axles on and rebuild everything with the 28 spline parts?

Thanks!
 

2000xp8

SN Certified Technician
Aug 8, 2003
8,029
1,621
194
NJ
Aug 14, 2011
#2
  • Aug 14, 2011
  • #2
If you are not slapping on sticky tires, i wouldn't worry that much about 31 spline.
Just get a carbon clutch rebuild kit meant for an 03 cobra.

With that said, not sure of your lug setup, but if it's 4 lug and you may want 5, nows the time.

Also i would use 3.73 gears.
 
R

reldla1996

Member
May 4, 2011
356
22
19
Dayton, Ohio
Aug 14, 2011
#3
  • Aug 14, 2011
  • #3
I second without sticky tires, and with 300 HP, 28 spline is plenty sufficient. I also think the 3.55 is the best all round ratio for a street car. That said, when I did mine a few years ago, I sure wish I had gone to 31 spline at the time, because it is probably in my future now.
 
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