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Old February 8th, 2009, 08:40
Fergie's Avatar
Fergie Fergie is offline
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242 front output swap - stange metal/metal rotating noise.

Gut check time:


Mid december the stock front driveshaft exploded on my '01 WJ, 242. The stock shaft had a rzeppa at the t-case, and single UJ at the axle. Now, once the stock shaft was removed, I heard no strange noises from the case. Fast forward to today, I replaced the rzeppa flange at the front output of the t-case with a yoke style. I rebuilt some minor part of the case at the same time, including the front output seal, front output bearing, rear seal, rear slinger and the chain, nothing else.

I went to install the new driveshaft, and it is 3/4" too long at full compression...that is getting addressed on monday; so I am currently running without a front driveshaft...still...


Everything is reassembled properly, and shifting properly,

Whenever I accelerate I hear a whisk whisk whisk whisk whisk metal on metal type of sound from the front output; I had never heard this before. If I take my foot off the gas, the noise goes away, and it is proportionate to my speed.

I put the rear on jackstands, started the Jeep up, and started working through the modes on the t-case. The noise is there, pinpointed to the front output.

Also, when I put the case in 4 Full Time, it feels as though the Jeep is in neutral(t-case and tranny), and the Jeep wont accelerate.The rear tires will still turn slowly, and the front output spins fast.

Now, once the stock DS was out in December, I never ran it through the modes on the t-case, so I have no reference, but the sound was never there.

So, here is the gut check part:

Is the noise due to the fact that without a front driveshaft, and the way the t-case distributes power, the front output is spinning faster than it should at the given speed? When I install the new DS, this should keep the output speed in line with the tire speed, correct?

Please, let me know you thoughts on this one.

Thanks
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Old February 8th, 2009, 17:43
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Fergie Fergie is offline
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Re: 242 front output swap - stange metal/metal rotating noise.

So I adjusted the oil slinger on the rear output shaft, and the nosie seems to have gone away.

I'm still puzzled by the loss of power in 4 Full Time. Any thoughts?
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Old February 8th, 2009, 17:53
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8Mud 8Mud is offline
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Re: 242 front output swap - stange metal/metal rotating noise.

Quote:
Originally Posted by Fergie View Post
So I adjusted the oil slinger on the rear output shaft, and the nosie seems to have gone away.

I'm still puzzled by the loss of power in 4 Full Time. Any thoughts?
Maybe it isn't fully engaging, you might have to load it up a bit (maybe use a little brake) to get it to engage.
How is your oil level?
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Old February 10th, 2009, 05:38
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hillbillypajeeps hillbillypajeeps is offline
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Re: 242 front output swap - stange metal/metal rotating noise.

the 242 can differentiate between pressure from front and rear sorta like a slip posi worksunlike the 231 so no ds up frt not enuf torque for it to work
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