96 ZJ 242 roaring noise in part time upon decel - JeepForum.com
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Unread 01-26-2010, 05:15 PM   #1
indianajeep
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96 ZJ 242 roaring noise in part time upon decel

Like the title says - when I put my 242 in part time, it makes a roaring noise upon deceleration. 2 wheel drive is fine - no noises. 4 wheel full time is fine, except every once in a while I get a whirring noise that comes and goes around 50 mph. 4 low seems to be fine, but 4 low is hard to tell just because it's a loud gear anyway.

The axle was just recently swapped in and doesn't have any vibes or noises of its own. The tfr case also made these noises with the old axle (that did have issues of its own - bad pinion and carrier bearings and worn pinion and ring gears).

I'm figuring that the gears that govern 4wd part time are singing their last song, and if that is the case (no pun intended) then, the rest of the TFR case cannot be far behind - anyone with any experience with this issue?

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Unread 01-26-2010, 10:59 PM   #2
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bump????????
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Unread 01-27-2010, 03:41 PM   #3
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bump again
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Unread 01-27-2010, 05:23 PM   #4
nick62087
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when you hear the roaring in part time, are you on hard pavement?
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Unread 01-27-2010, 07:55 PM   #5
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Yes. It happens on dry pavement.
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Unread 01-27-2010, 08:12 PM   #6
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Is there snow covering the dry pavement that your driving on in part time? If not you shouldn't be in part time, that might be the problem. Use full time or 2wd.
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Unread 01-27-2010, 08:36 PM   #7
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^^^ X2. 2wd or Full time is all you need.

Has the TC fluid been changed recently? Can't hurt. Easy and inexpensive to boot.
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Unread 01-29-2010, 08:20 PM   #8
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Dont Use Part Time On Dry Pavement!!
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Unread 01-30-2010, 06:52 AM   #9
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Every once in a while when I shift from 2wd to 4 full time, it will make that same noise while it is in 4 full time - sounds like it might be binding in 4 pt on its way to shifting through to 4 full time.
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Unread 01-30-2010, 01:03 PM   #10
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I was having the same prob but with ft. I now shift the tc to n then back up to ft and haven't had the problem since.
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