Driveline vibration between 40-45

[evo45]

I have a vibration on my 01 f-250 only between 40-45mph. Any other speed I dont feel anything. It is usually worse when I am slowing down and feels like it is coming from the back of the truck. I had my tires rotated and balanced and I still have it. I decided to crawl around under the truck to see what I could find and this is what I found.



It looks like the rear drive shaft by the carrier bearing threw one of the weights. I have only had the truck since July and it has had this vibration since I picked it up. The truck is from NY so the bottom of it is rusty, I am not sure a new weight would be able to be installed. What do the experts think? Thanks Vic

[MSGDAVE]

Take the shaft to a driveline shop and have them balance it.

[evo45]

From the pic does it look like it threw a weight? It seems like you can kinda see where there was a circle on the drive shaft.

[MSGDAVE]

I think it did too. The only way you can be sure is to spin it. Most off road shops have someone that can balance them.

[evo45]

I found a local shop that can do it for $100. I just have to bring him the whole drive shaft with the carrier bearing. I am not looking foward to it but it would be a good time to put new u-joints in while it is out. The ones that are in there look to be very rusty and old. Thanks for the replies.

[Raul@Stealth Automotive]

i agree.. def does look like it had one.... have it rebalanced and it should go away...

[MSGDAVE]

It is a good time to replace the u-joints, then you will know what you have.

[evo45]

Should I just go get some u-joints from napa or r there some better ones out there that I should find?

[MSGDAVE]

The ones from Napa are good. Ask for heavy duty if they carry them, I like to get ones i can grease myself.

[LawmanUSMC]

I had the same problem with the vibration at a certian speed. But it was also "clanking" when I shifted from drive to reverse and vice versa. And when I would slow down it would vibrate alot, just by letting off the pedal. I did the same thing you did and crawled under the truck and messed with the U-joints. Then the dang thing just feel apart. Fixed the U-joints and haven't had any problems since.