Vibration at all speeds

[iaff2702]

I have a 2005 F350 with 72000. I mostly pull with the truck and have noticed a vibration when pulling any of my trailers. The vibration is present without the trailer but is much worse when hooked to a trailer. I replaced the drive shaft carrier bearing, universals and had it balanced. The problem continues. I have had the issue thru 2 sets of tires so I don't think it's a tire issue. The problem seems to be worse when coasting. I don't think it's a tie rod or ball joint issue because it doesn't vibrate the steering wheel or get worse when hitting bumps. The tires are also wearing normally.

Any ideas are appericiated.

[jnobles06]

did you replace the drive shaft u joints? my truck was doing the same thing and it was the u joint that connects to the rear differential.

[paintingman]

One thing you can check is where the fly wheel and converter bolt together make sure bolts are not loose.

[tvandyck7]

Is the drive shaft yoke and shaft in the same orientation as they were from the factory? I had this problem last week when I took my rear shaft off to grease the splines on the slip joint. I forgot to make it before I took it apart and put it together 180 degrees backward and it made a vibration from being out of balance (especially when coasting). It looked fine and the u-joint eyes were in line, but it was out of balance. I took it apart again and turned the yoke 180 degrees and now it's fine.