Posi rear end?
Thread Starter
Junior Member
Joined: Jan 2007
Posts: 46
Likes: 0
From: Tucson
Car: 1988 Firebird
Engine: 2.8 liters of fury.
Transmission: Auto
Axle/Gears: Stock
Posi rear end?
Hey all, stupid question, but I have an 87 Formula and wanted to know if this car has a posi rear. Is there any way to tell by the vin or door jamb or something? I would just do a peel em but I don't think my neighbors would like that to much. Thanks, MAC
Supreme Member
iTrader: (1)
Joined: Jul 2004
Posts: 10,763
Likes: 4
From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
Re: Posi rear end?
Look at the pumpkin for a metal tag. If it's there it'll say it's a posi or not. So if it's grimy, bent, and old, then maybe you have the stock rear, and that's whats in there. If you have any inclination the rear end has been tinkered with in the last 20 years of that cars life, then you have no idea what's back there - unless you remove the cover, drain and refill the fluid (probably overdue anyway right?) and have a peek.
Junior Member
Joined: Dec 2006
Posts: 2
Likes: 0
From: Abbotsford,BC,Canada
Car: 1990 RS
Engine: 305 TBI
Transmission: 4 SPD Auto
Re: Posi rear end?
Lift back end up on a jack , spin one wheel if other side spins in the same direction it is posi.If it spins in opposite direction it is single tire fire !
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