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  '79 to '93 -- The Fox Mustang & Capri
  8.8 differential

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Author Topic:   8.8 differential
Velocity0
Gearhead

Posts: 154
From: Burnaby, BC Canada
Registered: Apr 2001

posted 07-10-2001 04:16 AM     Click Here to See the Profile for Velocity0   Click Here to Email Velocity0     Edit/Delete Message   Reply w/Quote
Is there a way to tell if a differential has posi without taking the cover off?
DO you just spin one wheel and if they both spin.......?

were all 8.8's made with posi?

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Rory McNeil
Gearhead

Posts: 250
From: Surrey, B.C. Canada
Registered: Nov 2000

posted 07-11-2001 03:11 AM     Click Here to See the Profile for Rory McNeil   Click Here to Email Rory McNeil     Edit/Delete Message   Reply w/Quote
No, all 8.8`s were not equipped with posi units, but MANY were. If the rear end is original, & still has the metal tag on 1 of the diff cover bolts, among other numbers it will have 8.8 stamped in the tag as well as the gear ratio. On a non posi, it will have just the ratio stamped, ie 2.73, 3.08 ect. On a posi rear, there will be a letter "L" in the ratio stamping, ie 2L73, or 3L08. The L indicates a locking rear end. If the tag is missing, turning one wheel, & having the other turn in the SAME direction, normally indicates a Traction lock rear. If you pull the diff cover off, you will see a S shaped steel preload spring between the side gears if it`s a posi. Hope this helps.

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Velocity0
Gearhead

Posts: 154
From: Burnaby, BC Canada
Registered: Apr 2001

posted 07-11-2001 03:29 AM     Click Here to See the Profile for Velocity0   Click Here to Email Velocity0     Edit/Delete Message   Reply w/Quote
yeah...thanks.

------------------
Tyler
1980 Mustang HB

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