8.8 Rear end ratio

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08-04-2006, 03:43 PM

85mercpark

Thread Starter

Join Date: Aug 2006

Posts: 1

8.8 Rear end ratio

Can someone identify the ratio on this rear end?
Is it a POSI?
Thanks

08-04-2006, 07:57 PM

Jugador

5th Gear Member

Join Date: Jul 2003

Location: Bangladesh

Posts: 4,840

RE: 8.8 Rear end ratio

if you spin the pinion and count how many times the axles rotate, you can get a rough idea of what gears you have (4.10's=4 rotations, 3.73=3 3/4 rotations etc). i believe you can tell it's posi if you spin one axle and the other axle spins the same direction

08-05-2006, 07:57 PM

Decurion

2nd Gear Member

Join Date: Apr 2006

Location: The unemployment epicenter, Detroit, MI

Posts: 432

RE: 8.8 Rear end ratio

3L73 means 3.73 ratio, limited slip

08-06-2006, 12:26 AM

Cobrakev

3rd Gear Member

Join Date: Feb 2006

Location:

Posts: 557

RE: 8.8 Rear end ratio

If that is a 8.8 rearend out of a Mustang, that is not a 3.73 rear. No Mustang came stock with 3.73 gears. The older autos had 2.73 gears in them.

Kev

08-06-2006, 12:30 AM

nitrous_bob

6th Gear Member

Join Date: Oct 2005

Location: st clair shores MI

Posts: 6,028

RE: 8.8 Rear end ratio

i'm guessing it's from a f150 or 250 w/ the towing package (not really guessing, i'd bet my next paycheck)

anyways, seems to be a 3.73 from those 2 digits.

if it happens to be from a stang you have, check the door tag...under "ax" m=2.73 , z=3.08 , and e=3.27 (aod only)