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Old 02-25-2003, 03:28 PM   #1
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86 GMC Jimmy rear end
I have a 86 GMC Jimmy 4x4 and i know it has 3:73 gear's that came from the factory, But how do i tell if it came with a posi rearend.
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Old 02-25-2003, 03:35 PM   #2
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pull the cover and look
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Old 02-25-2003, 09:47 PM   #3
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1. Jack it up and spin the wheels. If they spin the same way, it's posi.

2. Look for a metal tag on the diff indicating: "Use Limited-Slip Type Lube Only"
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Old 02-26-2003, 07:49 AM   #4
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Take off the cover and look. It's the only sure way to know.

If it has posi, it's probably the Eaton "Grenade-Lock".
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Old 02-26-2003, 07:49 AM
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Reload this Page 86 GMC Jimmy rear end
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