Rear end question
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Joined: Jun 2004
Posts: 489
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From: Chicago south suburbs
Car: 1988 IROC-Z28
Engine: L98(383tpi) modified
Transmission: 700R4 rebuilt
Axle/Gears: 3:73 10bolt rebuilt
Rear end question
I got a rear end of a 3rd gen firebird years ago. But other than it is a 3:73 gear with disc brakes I know nothing about it. I found a identification number on the housing which is #22522676. Can anyone provide any info on it for me, or direct me to a link that would provide info for me.
Thanks!
Thanks!
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Rear end question
I got a rear end of a 3rd gen firebird years ago. But other than it is a 3:73 gear with disc brakes I know nothing about it. I found a identification number on the housing which is #22522676. Can anyone provide any info on it for me, or direct me to a link that would provide info for me.
https://www.thirdgen.org/forums/tran...-10-bolts.html
BTW, should the rear end be OE, it probably came from an 83-86 L69, the 305 HO car (Vin G).
JamesC
Last edited by JamesC; Oct 31, 2009 at 04:48 PM.
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posi-limited slip or what how to test i've googled no real anser
im pretty sure i got burnt on buying a supposibley posi-rearend out of a 86 iroc z28 with the 350 tpi "he said" i seen the car it was a iroc z28. I bought the rearend he said was posi. The numbers are 2hd 176 1 i lookedit up it said 2:73, i think? Anyways when you turn the wheels out the ground you turn them one goes one way one goes the other way, anyone know what i have i tried finding the thread on here inestead of asking but i couldnt find it, thanks yall I have been to the forum that talks about the rearend i cant find how you test it?
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Joined: Jul 1999
Posts: 17,263
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Rear end question
2HD = 1986 2.73 open diff. If it has 3.73 and a posi then it's not original. A previous owner could can changed anything. The only way to know for sure what's in the diff is to pull the cover and have a look.
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Joined: Jun 2009
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Re: Rear end question
thanks steven for the info, and everyone else i tried to delete my post's above and i couldnt so i tried to edit that one post and just but question marks, but obviousley it put both of them on there, im thinking about just welding the spider gears now on the car hell with it lol.
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Joined: May 2013
Posts: 340
Likes: 4
From: Alta Loma, Ca
Car: 1990 Iroc Convertible
Engine: LS1
Transmission: T56
Re: Rear end question
"2HD = 1986 2.73 open diff. If it has 3.73 and a posi then it's not original. A previous owner could can changed anything. The only way to know for sure what's in the diff is to pull the cover and have a look."
Can anyone share a picture of each (inside the rear cover), limited slip and non limited slip? I'm in the process of buying one and don't want to run into the same problem. Thanks
Can anyone share a picture of each (inside the rear cover), limited slip and non limited slip? I'm in the process of buying one and don't want to run into the same problem. Thanks
Last edited by M3638; Dec 11, 2013 at 12:27 PM. Reason: More descriptive
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
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Joined: Oct 2003
Posts: 3,449
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From: Charlestown, IN
Car: 1971 Camaro
Engine: 427
Transmission: TKO600
Axle/Gears: 3.73
Re: Rear end question
If the tires turn in opposite directions you have an open rear, or a posi that needs rebuilt.
Senior Member
Joined: Jun 2011
Posts: 939
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From: Detroit, MI
Car: 1987 IROC-Z red t-top
Engine: Nothing much
Transmission: I wish t56
Axle/Gears: 9bolt 3.27 4sale
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