4th. gen rear in 3rd. gen
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Joined: Jul 2007
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4th. gen rear in 3rd. gen
Will this work? I found a 98 rear with 3:23 gears and the posi complete rear for 200. I think I read on here that someone did this but had to use different back spacing on the wheels. My car is a 89 RS with the regular rear for a auto with no posi.
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iTrader: (12)
Joined: Jul 1999
Posts: 12,212
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From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: 4th. gen rear in 3rd. gen
Please 
before asking...Everything you asked is answered weekly...Because of people not using the SEARCH feature.
before asking...Everything you asked is answered weekly...Because of people not using the SEARCH feature. 
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iTrader: (7)
Joined: Nov 2006
Posts: 3,740
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From: Alamogordo, NM
Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
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Joined: Jul 1999
Posts: 17,268
Likes: 169
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: 4th. gen rear in 3rd. gen
Your 89 will probably still have 26 spline axles. The only strength increase with a 4th gen diff is the 28 splines axles.
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