front end 4x4 noise? - Ford Powerstroke Diesel Forum
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Old 10-01-2011, 03:30 PM
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front end 4x4 noise?

i havent had to use 4wd lately but for ****s n gigles i put it in 4wd while driving straight on dry apvement. at slow speeds you can feel it engaged and a low rumble from the front. it gets louder the faster you go, and at speeds maybe 55 mph it starts to vibrate pretty noticable and can hear it. i took apart the drivers side (were it sounded like it was coming from) took hub and all off, but couldnt get the short shaft out, so didnt bother trying harder. i did notice the drivers side shaft had more up n down play in it than the passenger side. abouot 2x as much and would make small clunking when moving it. the hub seemed to be in good condtion, no premature wear on the shaft that i could see, needle bearings seemed decent (to me). greesed some **** up, threw it together, still doing it.

when not in 4wd, sounds fine and drives fine, but it does have a small clunk on bumps n sometimes turning.

ive tried disconnecting the vaccum line on either side an engaging 4wd, still does it no matter. id like any help, im going down to texas (from iowa) in 2 weeks, kinda would like this to be solid all the way down.


2001 7.3 CC f250
8 inch lift
38x15.5r16 mud grapplers
automatic hubs, in working order
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Old 10-01-2011, 03:49 PM
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Originally Posted by flatblack92xj View Post
i put it in 4wd while driving straight on dry apvement. at slow speeds you can feel it engaged and a low rumble from the front. it gets louder the faster you go, and at speeds maybe 55 mph it starts to vibrate pretty noticable and can hear it
Dude, wtf are you doing?????

You DO NOT drive a truck like ours (without an "open" Transfer case) on DRY PAVEMENT in 4WD!!!!!!!!!!!

Rumble, Vibrate, I bet!

What you're experiencing is the Ft & Rear axles fighting each other because of minor differences in tire rotation.......
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Old 10-01-2011, 03:53 PM
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hence the reason i said driving "straight". i straight forward motion will not hurt a thing, i dare not make turns with it.
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Old 10-01-2011, 04:03 PM
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Originally Posted by flatblack92xj View Post
hence the reason i said driving "straight". i straight forward motion will not hurt a thing, i dare not make turns with it.
No, No, No, Straight or Not, keep it out of 4WD unless there's some form of "slip" (even water) between the ft & rear axles.

You have a real truck, not some pos Jeep Wrangler the TC is locked there is No forgiveness between the axles. Tire wear, inflation, other differences in circumference has no place to go BUT vibration....
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Old 10-01-2011, 04:13 PM
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good thing an xj isnt a wrangler. but this isnt my first 4x4, nor is it my first "real" 4x4. if the axles were fighting each other it would cause the vibration at any speed and wouldnt make a grumble/grinding noise. it would also want to buck, cause the tires to chirp, bind up, etc. oh, and also, disconnectin the vaccum from one hub or the other would technically make it 3 wheel drive, and since the rear end is not a posi. VERY SAFE.
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Old 11-14-2011, 03:37 PM
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Originally Posted by NoRalPh View Post
No, No, No, Straight or Not, keep it out of 4WD unless there's some form of "slip" (even water) between the ft & rear axles.

You have a real truck, not some pos Jeep Wrangler the TC is locked there is No forgiveness between the axles. Tire wear, inflation, other differences in circumference has no place to go BUT vibration....

Sorry NoRalPh but your "Real truck 4WD" and a Wranglers 4WD work exactly the same.

FlatBlack92XJ try relacing your axle joints. Mine were doing the same thing.
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Old 11-27-2011, 09:25 PM
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Since some of you know so much about not driving because of no slip then go ask your buddy who has a real 4X4 truck with a locker to take a real tight coner while you are riding with them. That chirping or squelling you here is your slippage the tires will slip even on dry pavement expecially as light as are trucks are in the back end. Now with that out of the way are your drivelines in phase and you might need them ballanced.
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