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Old 12-11-2020, 04:12 PM   #18
Restoring my 1994 D21 4x4
Join Date: May 2020
Location: Arizona
Posts: 4
Vehicle: 1994 D21 4WD V6
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Originally Posted by Deerhurst View Post
Lift the truck up wit all 4 wheels off the ground and drop it in 4wd. Then look and see what spins. Might put a little resistance on each front tire and see if the other spins. Open diff so one side will spin if it doesn't have traction while the other won't.

If you can hold a tire and the axle spins the hub isn't locking.

Well after taking all the troubleshooting steps in the manual as well as the ones provided by Deerhurst, I found the Automatic hubs were worn out. I replaced them with the Mile marker 435's and will be going off road this weekend. Thanks for the help and hope this helps someone else in the future.
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