which rear end to use

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Apr 14, 2009 | 06:24 PM

nabisco

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Joined: Aug 2008

Posts: 6

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which rear end to use

i have a 92z and a 87 2.8, and doing a v8 swap into the v6 car and want to know if the rear ends are the same or if the z one will be better?

Apr 14, 2009 | 06:52 PM

JamesC

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iTrader: (5)

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: which rear end to use

Quote:

Originally Posted by nabisco

i have a 92z and a 87 2.8, and doing a v8 swap into the v6 car and want to know if the rear ends are the same or if the z one will be better?

Check the following link:

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC

Apr 14, 2009 | 07:07 PM

AlkyIROC

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Joined: Jul 1999

Posts: 17,263

Likes: 168

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: which rear end to use

There's no such thing as a V6 or V8 differential. If they're both 7.5" 10 bolts then they're identical except for gearing and if they have a posi or not. Strength wise, they're roughly all the same.

The 92 will be a better choice because it will have the larger 28 spline axles which all third gens got from 90-92 regardless of engine or transmission. It will have the same tiny 7.5" ring and pinion as the 87 although may be a different ratio.