front drive shaft spinning in 2wd -
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Unread 04-12-2009, 03:45 PM   #1
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1989 YJ Wrangler 
Join Date: Dec 2007
Location: tn
Posts: 176
front drive shaft spinning in 2wd

I have an 87 yj all stock running gear, stock vac actuator and all, when I drive down the road in 2wd my driveshaft spins, but my tc is locked in 2wd. Is this normal?

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Unread 04-12-2009, 03:52 PM   #2
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1998 XJ Cherokee 
Join Date: Jan 2007
Location: Plymouth, MA
Posts: 480
ya it will spin a little bit but if you were to grab it which i dont suggest, it should stop moving, i found this out after i had the shifter plate out of my heep
1998 4dr XJ
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Unread 04-12-2009, 04:02 PM   #3
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1994 YJ Wrangler 
Join Date: Sep 2004
Location: Worcester, Mass
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It'll probably spin a little bit due to the friction of the oils in the transfer case.

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Unread 04-12-2009, 04:07 PM   #4
from here it gets rough
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1993 YJ Wrangler 
Join Date: Dec 2007
Location: Beyond Honolulu
Posts: 4,846
When parked, can you roll under your Jeep and turn the front shaft freely when you're in 2WD? This is the way the NP231 should work, unless you have a locker in your front axle.

When I bought my Jeep, the front shaft wouldn't spin freely when in 2WD. When I rebuilt the Transfer case, I found that the mode spring had been left out, likely by whoever did some sorta maintenance on it. I replaced the spring with the rest of my rebuild, and it spins freely by least it did until I put in an Aussie.
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