Vibration
Thread Starter
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Senior User
Joined: Mar 2007
Posts: 217
Likes: 1
From: Katy Texas
Vibration
Hey guys I have a '99 F350 CC long bed 4x4. The truck has 106k. tires are 35/12.50/16.5 BFG AT TA KO'S 2'' levelling kit in front. This is the 3rd set of these tires i've had. My problem is an annoying vibration between 39-42 mph which has always been there.I can't really tell where it's coming from, and of course in the commute i spend a lot of time at these speeds.I balance and rotate every 4k so i don't think thats the problem.Any ideas what could be causing this?.
Thanks
SLAYER1
Thanks
SLAYER1
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
Can you tell where it's coming from?
I'd start with a good alignment, if you haven't replaced your shocks get a set of bilstiens. Check your leaf spring bushings and grease everything under the body.
I'd start with a good alignment, if you haven't replaced your shocks get a set of bilstiens. Check your leaf spring bushings and grease everything under the body.
Postmaster
Joined: Dec 2003
Posts: 3,130
Likes: 3
From: Massachusetts
Do you really balance the tires every 4K miles? What a pain that has gotta be. Are the BFG that bad that they need that kind of attention?
Every time I had a vibration in a very specific MPH window it has always been tires.
Every time I had a vibration in a very specific MPH window it has always been tires.
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
I use to ballance my mickey thompsons after every oil change. It's not a bad habit on any tire, it should extend thier life and make them quite and smooth for as long as they have tread.
On my fathers work truck he has the county rotate his tires monthly to keep his MTR quite. It's just an opinion/maintance thing.
On my fathers work truck he has the county rotate his tires monthly to keep his MTR quite. It's just an opinion/maintance thing.
Thread Starter
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Senior User
Joined: Mar 2007
Posts: 217
Likes: 1
From: Katy Texas
I bought the lifetime balance at NTB when i bought the tires. It does make a huge difference in the life of the tires. The first set i had were so chopped at 25k i couldn't hardly drive the truck. I've had the alignment done by a shop i really trust so i don't think thats the issue. I've owned the truck for about 70k and its always had this vibration. It does seem to be better with some weight in the rear. Could being unloaded have something to do with it? SLAYER1
Post Fiend
Joined: May 2006
Posts: 10,007
Likes: 4
From: Central Florida
Ok, so it's in the rear. Drive shaft issues don't usually smooth out, but check your Ujoints anyway and look at the shaft for heavy rust. I'd also concider changing the shocks out.
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Postmaster
Joined: Jan 2005
Posts: 4,743
Likes: 3
From: Peoria, IL
It might be a problem with the carrier bearing for the rear driveshaft. It might be worn out or need shimmed different to get the driveshaft angle right. I'm guessing if it get's bettter when you have a load in the back, you need to play with the shims.
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