3.73 posi setup
Thread Starter
Senior Member

Joined: Mar 2007
Posts: 574
Likes: 2
From: Muscatine IA
Car: 91 Firebird Formula
Engine: 383
Transmission: built 700r4
Axle/Gears: 4.11, 9inch
3.73 posi setup
ive got a 3.73 posi unit out of my 91 firebird for sale. eaton gov lock, 28 spline axles. comes complete all you have to do is bolt it up. housing axles, drum brakes all in there. asking 600 obo.
moline IL
willing to trad for set of weld drag lights or pro stars
moline IL
willing to trad for set of weld drag lights or pro stars
Junior Member
Joined: Jun 2007
Posts: 75
Likes: 0
Car: 88 Formula
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 2.73
Re: 3.73 posi setup
Hello,
I have a 88 formula with a stock open 2.73 drum rear, this seems to be what I'm looking for, I'd like some pictures of it please.
Also, my offer is $500, only because it's drum brakes, and It's going to take me some time and money to convert it to disc, as I'm dropping in a 300hp+ vortech 350, I'll need the braking power in the rear.
Are the brake lines also on it?
Also, I'm in St. Louis, MO, roughly 4 hours or so from you, I'm very serious and would like to meet half way, as I can't drive 8 hours combined, it's impossible due to my work schedule.
Let me know,
Thanks.
I have a 88 formula with a stock open 2.73 drum rear, this seems to be what I'm looking for, I'd like some pictures of it please.
Also, my offer is $500, only because it's drum brakes, and It's going to take me some time and money to convert it to disc, as I'm dropping in a 300hp+ vortech 350, I'll need the braking power in the rear.
Are the brake lines also on it?
Also, I'm in St. Louis, MO, roughly 4 hours or so from you, I'm very serious and would like to meet half way, as I can't drive 8 hours combined, it's impossible due to my work schedule.
Let me know,
Thanks.
Thread Starter
Senior Member

Joined: Mar 2007
Posts: 574
Likes: 2
From: Muscatine IA
Car: 91 Firebird Formula
Engine: 383
Transmission: built 700r4
Axle/Gears: 4.11, 9inch
Re: 3.73 posi setup
tswaim the eaton unit and the gears are the upgrades. all firebirds in 91 had 28 splined axles
mischief it has the brake lines on it. i did notice today that an axel seal is leaking on the left side. isnt too hard to do takes me bout an hour to do one and axles should have to come out to pull the backing plate off.
i can do 500 but if you want me to drive out there id kinda like an extra 50 bux for the time and gas.
theres a town called st francisville just south of the ia, mo border. that would work best for me. let me know what you wanna do
mischief it has the brake lines on it. i did notice today that an axel seal is leaking on the left side. isnt too hard to do takes me bout an hour to do one and axles should have to come out to pull the backing plate off.
i can do 500 but if you want me to drive out there id kinda like an extra 50 bux for the time and gas.
theres a town called st francisville just south of the ia, mo border. that would work best for me. let me know what you wanna do
Thread Starter
Senior Member

Joined: Mar 2007
Posts: 574
Likes: 2
From: Muscatine IA
Car: 91 Firebird Formula
Engine: 383
Transmission: built 700r4
Axle/Gears: 4.11, 9inch
Re: 3.73 posi setup
ive still got it.
have all the stock rear suspension too
sumbody make me an offer
have all the stock rear suspension too
sumbody make me an offer
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Thread Starter
Senior Member

Joined: Mar 2007
Posts: 574
Likes: 2
From: Muscatine IA
Car: 91 Firebird Formula
Engine: 383
Transmission: built 700r4
Axle/Gears: 4.11, 9inch
Re: 3.73 posi setup
ill take 35 bucks plus shipping for the rear suspension if you want it all. like i said its all stock.
ive also got a set of 25 aniversy camaro wheels 16x8 id like to get 200 for. il try to get pictures for everybody here soon. been kinda busy
ive also got a set of 25 aniversy camaro wheels 16x8 id like to get 200 for. il try to get pictures for everybody here soon. been kinda busy
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