Ok, I'm stumped - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 07-13-2009, 04:34 AM Thread Starter
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Ok, I'm stumped

I have this annoying vibration in the floor and steering wheel/ minor grinding growl kinda noise in front end. It seems to be the worse when accelerating. It almost gos away when cruising and does go away when decelerating. I cant seem to find the problem, i checked u joints but to me it doesnt seem like u joints but they seem fine. Ball joints look good and there is no play in the wheel bearings i can find. All fluids are topped off as well. Ive used the search function and cant find an answer. Any help would be appreciated cuz its driving me nutz.

Early 99 f-250 cab and half longbed 4" intake and exhaust edge evolution II(for egt and boost guage only), trans temp guage trucool max 40K, TW 6 pos
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post #2 of 12 Old 07-13-2009, 04:40 AM
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As crazy as it sounds... Check further back in the truck. A friend had issues affecting his wheel and came and went like you stated. It ended up being his carrier bearing.

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post #3 of 12 Old 07-13-2009, 04:40 AM
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sounds like u- joints, make sure when you check them the truck is in neutral so there is no load on the drive shaft.

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post #4 of 12 Old 07-13-2009, 05:03 AM
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The only way to really check U-joints is to pull the drive shaft. If they're rusted tight you won't feel any play in them but they sure can cause a vibration. While the shaft is out you can make sure that the carrier bearing feels smooth and that the rear end also feels normal.

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post #5 of 12 Old 07-13-2009, 06:50 AM
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Totally agree with the Ujoint/carrier bearing theory. Front driveshaft as well as main driveshaft, if its a 4x4.

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post #6 of 12 Old 07-13-2009, 07:02 AM
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U-joints and if you have a carrier bearing that can cause the problem too.


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post #7 of 12 Old 07-13-2009, 07:28 AM
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If it was recently lifted (which I don't see in your sig, so probably not the issue) the pinion angle on the rear axle may be off too. Otherwise I agree with U joints or carrier bearing.
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post #8 of 12 Old 07-13-2009, 07:57 AM
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mine did this awhile back and it was the u joints. there fairly simple to do. it took me a few hours but it was the first set of u joints i have ever done. i could prob do it next time in about an hour or so.

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post #9 of 12 Old 07-13-2009, 04:09 PM Thread Starter
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Ok today it did seem more like something futher back. I guess u joints arnt crazy expensive just time consuming but how do i check the carier bearing? That it in the rear end right? Thanks for the help as always and should i just replact that bearing if i got the driveshaft off anyway?

Early 99 f-250 cab and half longbed 4" intake and exhaust edge evolution II(for egt and boost guage only), trans temp guage trucool max 40K, TW 6 pos
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post #10 of 12 Old 07-13-2009, 04:14 PM
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The carrier bearing is the "support" near the center u-joint in the driveshaft. The only way I am aware of to check it is to block the wheels and put the truck in neutral and push/pull vertically on driveshaft and check for excessive play (The rubber will give some). I would imagine that you could take out the two mounting bolts and check that it spins smoothly and freely also. My buddies truck has a carrier bearing that the rubber bushing is worn out and it is on occassion letting the driveshaft touch the metal that supports the bearing. Needless to say, he has some vibes too.
-Aaron

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