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View Full Version : hard but shapr short interval vibration over 70 mph


Guthrie&Co
03-03-2005, 11:01 PM
well guys i have checked the tires and hubs and both seem to be doing well. i have a vubration only over 70 mph and it is not engine rpm related. i can feel it all over the truck but i can hold onto the 4x4 shifter lever and feel it in there. i have a 99 f 250 psd 4x4. i have heard everything from universals going out, to a bent driveshaft. where do i start looking and what do you guys think it might be. thanks in advance. scapes

grass disaster
03-03-2005, 11:41 PM
you need to get your tires BALANCED. i'm no expert but i'm about 90% sure this is your problem. it could be due to old tires/sat too long. or just every day use.

Guthrie&Co
03-03-2005, 11:51 PM
its not the tires. they were just balanced

grass disaster
03-04-2005, 12:30 AM
its not the tires. they were just balanced

then i guess i don't know. sounds like this is one for the mechanic

xcopterdoc
03-04-2005, 07:16 AM
I recall a TSB for vibrations in Ford trucks.. seems like it had to do with the slip yoke on the driveshaft. Check with your Ford dealer to see if any TSB's apply to your truck.

ztoro
03-04-2005, 10:15 AM
Does this truck have a lift on it? If you lifted the truck(or prior owner did) the carrier bearing may need to be shimmed.... Its like 50 dollars and a DIY... Or you may just need to get your driveline balanced....

xcopterdoc
03-04-2005, 06:18 PM
try this...

xcopterdoc
03-04-2005, 06:21 PM
oops... this may be better

Guthrie&Co
03-07-2005, 12:35 AM
thanks guys. i will let you know what they find. she goes in the shop tomorrow am.

Guthrie&Co
03-07-2005, 06:31 PM
one bent driveshaft. 450bucks. plus labor

xcopterdoc
03-07-2005, 07:47 PM
Glad ya found the problem and got it corrected. Thanks for posting back with the fix!

Guthrie&Co
03-07-2005, 08:12 PM
well she isnt fixed yet. the shaft wont be in until late this week. but that buys me some time to shop around for a better deal as well.

Jerry and Sons
03-09-2005, 11:12 AM
Any idea of the cause?