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Author
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Topic: How to determine what rearend I have??
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SydeWaySix
CAFords OG
Member # 3596
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posted
 
 
How could I determine what 8.8 rearend I have? Are there obvious differences between sn95 cobra, sn95 gt, and Foxbody rearend?
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2013 Boss 302 #356. Performance White. Stock.
1965 Fastback GT Restored to stock spec.
Posts: 9882 | From: Bay Area | Registered: Dec 2002
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5.0 LsX
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Member # 10017
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posted
is there a metal tag hanging off the cover? that will say the type of rear, year and gear ratio if it hasnt been changed
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91' Notch
Posts: 1260 | Registered: May 2010
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DIRTY SALLY
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Member # 7845
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posted
sn95s are longer based ![[Confused]](confused.gif)
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Savage Habits
instagram @2cheezen
Posts: 9145 | Registered: Aug 2007
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jegg
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Member # 9910
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posted
jack up one wheel and spin the wheel TWO turns and count the revolutions of the drive shaft. about 3 1/2 = 3.55 3 3/4 = 3.72 4 1/8= 4.10
you need to turn the wheel two revolutions because of how the spider gears change the ratio.
i saw this online some where. cant remember where
[ March 20, 2012, 03:36 PM: Message edited by: jegg ]
Posts: 163 | Registered: Apr 2010
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SydeWaySix
CAFords OG
Member # 3596
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posted
Thanks for the info on how to determine gear ratio! I'll try that.
But I'm wondering how i can determine if my rearend is from a sn95 gt, sn95 cobra, or a Foxbody. Are there differences?
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2013 Boss 302 #356. Performance White. Stock.
1965 Fastback GT Restored to stock spec.
Posts: 9882 | From: Bay Area | Registered: Dec 2002
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jegg
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Member # 9910
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posted
ohh.. i see....haha...o well...
hmm...i couldnt tell ya that one..
Posts: 163 | Registered: Apr 2010
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Duncan Motors
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Member # 7045
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posted
the housings are the same on all. fox is fox legnth. sn 94 to 95 is a lil wider . and after that im not sure but i know they go wider and then a year again they go even wider. the difference, is the axle length and the brakes to match the wider axles. on difference in the cobra stuff is bigger disc an calipers and caliper brackets, and the anti moans are different on the cobras as well. gear ratio can be told by how many drives shafts complete rotations, to one rotation of the wheel. like if the driveshaft spun 4 times to one rotation of the wheel, it 4.oo so a 410 gear. 3 1/2 turns to one turn on the wheel would be 350 gears. hope that helps a bit.
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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Duncan Motors
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Member # 7045
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posted
lol u have a ford rearend lol that help? loljk
Posts: 6310 | From: Vallejo | Registered: Sep 2006
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DIRTY SALLY
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Member # 7845
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posted
quote:
Originally posted by Duncan Motors:
lol u have a ford rearend lol that help? loljk
yea its ford rearend alright ![[Razz]](tongue.gif)
look to see if it has a part num on it that begins with a e like E6 OT E7 E8 ECT or a num that looks like this
2L73A88= 2.73 1988 rear end
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Savage Habits
instagram @2cheezen
Posts: 9145 | Registered: Aug 2007
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MUSTTANGUY
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Member # 2251
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posted
All 86-98 8.8 housings are the same, nothing special or different about any of them whether Cobra (93 or 94-98)or standard GT
86-93 uses same axles whether 7.5 or 8.8
94-98 uses axles 3/4" longer per side due to disc brakes than Fox
99-04 is about 1 7/16" longer per side than fox
Cobras will have the larger vented 11" rotors and specific mounting brackets.
Additionally, metal tag on rear cover will show something like 3L08 8.8 which would be a 3:08 gear ratio,traction lock, 8.8 rearend.
[ March 20, 2012, 07:16 PM: Message edited by: MUSTTANGUY ]
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Tim (Musttanguy)
97 5.0 coupe
82 GT 427/T56/9"
Posts: 1690 | From: Lodi | Registered: Dec 2002
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