4th gen and 3rd gen rear ends
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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
Yes. They're the same size diff. The fourth gen is just wider. The same cover will also fit on S10's and any other GM that uses the 7.5/7.625" diff.
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