[IN] Looking for 3.73 ring and pinion

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Old 12-03-2010, 05:56 PM
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Car: 1987 Firebird Formula
Engine: 355
Transmission: 700R4
Axle/Gears: Posi, 3.23
Looking for 3.73 ring and pinion

I'm looking for a 3.73 ring and pinion set to put into my 87 Formula. Put a 355 in a couple years back and still running the 3.23 posi and want to switch to the 3.73.

Prefer GM gears, but any other brand will work. Used or new. Don't have a whole lot of money to spend. Looking around maybe $100 shipped. Let me know what you've got.

Thanks!
Old 12-07-2010, 07:21 AM
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Car: 92 firebird, 95 Z28
Engine: LO3, LT1
Transmission: 700R4, 4L60E
Axle/Gears: 2.73 4th gen posi(x2)
Re: Looking for 3.73 ring and pinion

I've got some 3.73 gears used, gm. What's the zip so I can get a shipping quote. I'll take 50 plus shipping
Old 12-08-2010, 07:03 PM
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Car: 1987 Firebird Formula
Engine: 355
Transmission: 700R4
Axle/Gears: Posi, 3.23
Re: Looking for 3.73 ring and pinion

Zip is 46805.

Would you happen to have any pics? Do you know how many miles are on them?
Old 12-08-2010, 07:11 PM
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Car: 92 firebird, 95 Z28
Engine: LO3, LT1
Transmission: 700R4, 4L60E
Axle/Gears: 2.73 4th gen posi(x2)
Re: Looking for 3.73 ring and pinion

I'll try to get some pics for you asap. I do not know how many miles are on them, they were installed by someone else on a used rear end. the bearings were all shot in that rear end so I pulled them out and put in a set of 3.42s that I had sitting around (for mileage) Ill try to get some close-ups of the teeth for you.
Old 12-08-2010, 07:31 PM
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Car: 1987 Firebird Formula
Engine: 355
Transmission: 700R4
Axle/Gears: Posi, 3.23
Re: Looking for 3.73 ring and pinion

Alright, thanks man. I really do appreciate it. I normally wouldn't go for getting something used in this category of parts, but I'm on a tight spending budget when it comes to this car (it's a third vehicle and just a summer car) but I absolutely have to get rid of these 3.23s. So as long as they look to be in good shape, I'll take 'em.
Old 12-10-2010, 08:48 PM
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Car: I have a 91 Camaro RS
Engine: 383 stroker
Transmission: Stock automatic 700r4
Axle/Gears: I have 3.73 Gears with a Eaton posi
Re: Looking for 3.73 ring and pinion

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