Rear end

1984 GMC TRUCK
640,000 MILES • 6.0L • V8 • 2WD • AUTOMATIC
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NABILALMASRI
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After driving for three miles the rear wheels quit turning after thirty minutes they go back to normal. i checked rear end fluid it is okay, but i could not check rear brakes. could it be rear brakes?
Dec 8, 2017 at 7:51 AM
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PATENTED_REPAIR_PRO
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Is this a lockup differential?
I do not see any 6.0 liter engines listed for a 1984 GMC truck. is this the OEM engine?
Why can you not check the rear brakes?
Dec 8, 2017 at 8:33 AM