Banging noise in 4wd -
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Unread 07-21-2001, 07:30 PM   #1
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Join Date: Jun 2001
Location: utah
Posts: 22
Banging noise in 4wd

I just started having problems with my Wrangler in 4wd, (high and low) It makes a loud banging, or knocking noise whenever it's engaged and I'm moving forward, it seems to be coming from the transfer case. Any idea what this could be?

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Unread 07-21-2001, 07:48 PM   #2
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Join Date: Mar 2001
Location: Michigan
Posts: 471
Check the u-joints on the front driveshaft - you may have lost a bolt on the saddle strap which holds the u-joint of the front driveshaft to the transfer case output. When you engage 4 wheel drive, the output shaft starts spinning and would throw the driveshaft all over the place if it's loose, making one heck of a banging sound. You wouldn't feel it in 2 wheel drive if its only the front driveshaft.
89' YJ - 4.2 - NV4500 - NP231w/sye - 1" Body Lift - 2 1/2" Rancho Suspension Lift - 31" Firestone MTR - AR Outlaw II - Tomken Bumpers F & R - Warn 8000 front - Warn 6000 rec. mount rear - FlowFit Seats - Tom Woods Rear & Custom 2" front driveshafts
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