Vibration-rear
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Senior User
Joined: Jan 2003
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From: Maryland
Vibration-rear
I have a slight vibration ONLY during acceleration when the truck reaches 20 mph. It only lasts 1-2 seconds or when it hits 25 mph. It does not do it before or after these speeds and does not do it at those speeds when slowing down or stopping.
It is very slight, just wanted to know if there isa problem or an adjustment to be made. It runs near perfect otherwise. Thanks!
Mike
It is very slight, just wanted to know if there isa problem or an adjustment to be made. It runs near perfect otherwise. Thanks!
Mike
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Joined: Mar 2003
Posts: 32
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From: Scotland, CT
Vibration-rear
Mike
I had an 86 f-150 that would do the same thing when a u-joint was starting to go. At about 35 it would start to vibrate then would go away at about 40. I'm not sure of the exact way to check the ujoint because I alway's had the local garage replace them. I think you have to put the tranny in drive, not running of course, and set the parking brake so the drive shaft can't move. Then climb under there and see if there is any play or looseness at the joints. I know they're supposed to be tight with no play. Hopefully someone who knows the proper way will reply in case i'm way off track. I do know if it's in park the drive shaft will rotate some so it's hard to check that way. I have done that before.
Hope this helps some.
Marc
I had an 86 f-150 that would do the same thing when a u-joint was starting to go. At about 35 it would start to vibrate then would go away at about 40. I'm not sure of the exact way to check the ujoint because I alway's had the local garage replace them. I think you have to put the tranny in drive, not running of course, and set the parking brake so the drive shaft can't move. Then climb under there and see if there is any play or looseness at the joints. I know they're supposed to be tight with no play. Hopefully someone who knows the proper way will reply in case i'm way off track. I do know if it's in park the drive shaft will rotate some so it's hard to check that way. I have done that before.
Hope this helps some.
Marc
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Joined: Jul 2002
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From: McAllen, Texas
Vibration-rear
I believe what you are experiencing is driveline vibration which is so typical with lifted Sds. But, I have found a few cases where even stock trucks exhibit this same issue. Two things to check are the condition of your rubber carrier bearing isolator, and the rear driveline slip joint. The problem is probably the result of a worn or stressed carrier bearing but I believe I read somewhere about a Ford service bulletin calling for lubrication of the slip joint to alleviate the vibration issue exhibited by some trucks. Hope this helps.
Postmaster
Joined: Feb 2002
Posts: 3,496
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From: Calgary Canada
Vibration-rear
Originally posted by Palumbo
Hey Mike
Good thing Overkill read your post. I was way off huh?
That's why I work in a bank.
Marc
Hey Mike
Good thing Overkill read your post. I was way off huh?
That's why I work in a bank.
Marc
I think you're original post was a good diagnosis, and the easiest place to start. Checking and replacing the u-joints is simple and inexpensive, if that doesn't solve the problem, then you can go into the rear diff.
Lubing the slip yoke as Overkill mentioned is also a cheap and inexpensive job, it's just good preventative maintenance too.
Waxy
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From: Maryland
Vibration-rear
I did have have the slip yoke checked and regreased and that fixed the another problem of feeling liked getting your rear bumper tapped when accelerating. The slip yoke kit fixed that problem.
This 20-25mph vibration is a separate problem I think. I will check the u joints and the rubber carrier bearing isolator. Like I said its minor, but if it's not right, I would like to fix it! Great input! Thanks again guys!
Mike
This 20-25mph vibration is a separate problem I think. I will check the u joints and the rubber carrier bearing isolator. Like I said its minor, but if it's not right, I would like to fix it! Great input! Thanks again guys!
Mike
Senior User
Joined: Nov 2002
Posts: 460
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From: Long Island
Vibration-rear
The driveline vibration you describe seems to be only on Short Bed Crew Cabs and Long Bed Super Cabs. My 2002 supercab did it since day one and my brother in laws crew cab short bed did the same thing. They are almost identical in wheelbase. Anyway I had the driveshaft replaced and it is not as bad as it used to be.
2002 F-250 Supercab XLT 4x4 5.4 Auto ESOF
2002 F-250 Supercab XLT 4x4 5.4 Auto ESOF
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Posting Guru
Joined: Jan 2003
Posts: 2,181
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From: Eastern CT.
Vibration-rear
Hi Mike,
My 99' F-350 just recently (4 days ago) started a vibration, I stopped at a buddys garage and we checked it out, we found the slip yoke to have some play in it, all original 46, K miles on it,we jacked it up, spun the wheels, al seemed fine, (not a wheel bearing), then we ran it on the jack stands, in drive about 20 mph or so, we could see the slip yoke wobble some at certain points. So I will soon be checking out a new yoke set up, u-joints and carrier bearing all the same time,,this time all will be greasable
We could see the start of rust buggers coming out of one of the u-joints also....!
later,,,,,,,,,,,,,,,,,,,,,,,,Mark
PS, it is a 99' F-350,PSD,4x4,SC, DRW, 9' dump:
My 99' F-350 just recently (4 days ago) started a vibration, I stopped at a buddys garage and we checked it out, we found the slip yoke to have some play in it, all original 46, K miles on it,we jacked it up, spun the wheels, al seemed fine, (not a wheel bearing), then we ran it on the jack stands, in drive about 20 mph or so, we could see the slip yoke wobble some at certain points. So I will soon be checking out a new yoke set up, u-joints and carrier bearing all the same time,,this time all will be greasable
We could see the start of rust buggers coming out of one of the u-joints also....!later,,,,,,,,,,,,,,,,,,,,,,,,Mark
PS, it is a 99' F-350,PSD,4x4,SC, DRW, 9' dump:
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