Odd vibration

[SykoStroker06]

I have a odd vibration at highway speeds. I have had the tires rebalanced. I checked the slop in the universal joints and they seem tight. My question is about the center bearing for the two piece driveshaft. I crawled under the truck and looked at the center bearing. It looks like it may be leaking or the seal on it may be shot. Is this something that may cause a vibration. I have no vibration in the steering wheel nor do I experience the dreaded "death wobble". The vibration I can feel it in the seat and only around 60-65 mph. Any advice about this or the easiest way to replace it is appreciated.

[late_99_PSD]

You checked for slop in the drive shaft but did you check to see if the joint was to tight. The only way to check the driveshft is to take it off the truck and check that cach joint moves freely. Before the joint has slop in it, it will get tight and not want to spin, wipping the driveshaft. This is most likely your problem.

[SykoStroker06]

I'll see about pulling it off. I am assuming if I use a paint marker and scribe where everything was, it shouldn't be too much of a hassle to pull it off. What kind of universals are OK to replace it.

[SykoStroker06]

Bump. Any other ideas or tips on repair, removal of a driveshaft.

[Dave]

If the carrier bearing is leaking theres your problem