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Originally Posted by 1981Cheyenne
I thought the late 80s chevs didnt have locking hubs...My 81 just has the 4wd gearshift that engages 4wd.
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I use to own a 86 suburban 4x4 and it had automatic locking hubs. I was looking in the owners manual and from what I gather in it, this was an option, (manual locking or automatic); possibly the same option for this truck I own (85 silverado 4x4).
I still have vibration at 40+ mph. Someone told me that one of the tires may have separtated inside, causing the vibration; the u-joints feel tight.
Good day!