Is this supposed to happen??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

92470 · 08-04-2009, 05:00 PM

I was under my totally stock 87' V10 this weekend changing the oil. I reached up and grabbed the driveshaft between the transfer case and front differential. While I was laying there I started rotating it back and forth slightly. When I pulled myself out from under the truck still grabbing it, it rotated a bit further and locked. I then could no longer rotate it at all. My truck was off, in park and the shift lever in 2H. Should I have been able to do this? I know I obviously wouldn't be able to completely rotate it (not Superman here), but should it have locked up like that? I feel stupid asking this but, any comments? Thanks

Albatrossian · 08-04-2009, 07:06 PM

Auto hubs?

92470 · 08-05-2009, 12:02 PM

Yes, it does have automatic locking hubs.

72 CustomCamper · 08-05-2009, 12:36 PM

You turned it enough to lock the hubs in...

Chuck

92470 · 08-05-2009, 01:47 PM

I never knew you could do this manually the way I did it. So if my shift lever inside shows 2H, and I have locked the hubs manually on accident, then what is going on between my transfer case, front diff, and shift lever at this point (damage)? If this makes sense? And then, what do I need to do to make sure everything returns to normal and I am not damaging anything?

08-04-2009, 05:00 PM	#1
92470 Registered User Join Date: Nov 2006 Location: Maple Grove, MN Posts: 149	Is this supposed to happen??? I was under my totally stock 87' V10 this weekend changing the oil. I reached up and grabbed the driveshaft between the transfer case and front differential. While I was laying there I started rotating it back and forth slightly. When I pulled myself out from under the truck still grabbing it, it rotated a bit further and locked. I then could no longer rotate it at all. My truck was off, in park and the shift lever in 2H. Should I have been able to do this? I know I obviously wouldn't be able to completely rotate it (not Superman here), but should it have locked up like that? I feel stupid asking this but, any comments? Thanks

08-04-2009, 07:06 PM	#2
Albatrossian Georgia Boy Join Date: Jun 2008 Location: Douglas, Georgia Posts: 370	Re: Is this supposed to happen??? Auto hubs? __________________ 81 GMC High Sierra, 2WD, 357ci/700R4, 3.73s, posi.

08-05-2009, 12:02 PM	#3
92470 Registered User Join Date: Nov 2006 Location: Maple Grove, MN Posts: 149	Re: Is this supposed to happen??? Yes, it does have automatic locking hubs.

08-05-2009, 12:36 PM	#4
72 CustomCamper huh ??? Join Date: Nov 2002 Location: Fredericksburg,Va. Posts: 3,368	Re: Is this supposed to happen??? You turned it enough to lock the hubs in... Chuck __________________ 90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!"

08-05-2009, 01:47 PM	#5
92470 Registered User Join Date: Nov 2006 Location: Maple Grove, MN Posts: 149	Re: Is this supposed to happen??? I never knew you could do this manually the way I did it. So if my shift lever inside shows 2H, and I have locked the hubs manually on accident, then what is going on between my transfer case, front diff, and shift lever at this point (damage)? If this makes sense? And then, what do I need to do to make sure everything returns to normal and I am not damaging anything?

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