Vibration in drive shaft.... replaced u-joints

[Brian82]

Alright, got an 06 f250 8ft bed, extended cab. Had a vibration in the truck from stop to about 15-20mph. suspected U joints in drive shaft. Could hear squeak driving slow, sounded like normal u joint failure noise associated with minor vibration.

replaced u-joints in drive shaft(2 piece shaft with center support bearing) still have original center support bearing, which seemed in good shape after pulling the drive shaft out, spun easy . no play.

after replacing the U Joints in the drive shaft. i NOw have a much worse vibration. This is the first time i have dealt with a 2 piece shaft. Now sure if u joint replacement would/should warrant getting the drive shaft balanced now>?

Definitively have a vibration in the truck now, goes away at 55mph. strong below that.

Any suggestions.

[06lariat4x4]

rotate the driveshaft 180 degrees. you may not have lined it back up correctly.

[Brian82]

I will give it a shot. have been trying to adjust the center support bearing, that also seams to be making it better and worse. Cant get it right. the rubber that supports the bearing looks almost shot and doesn't sit square. might have someone press a new one on the shaft.

[Brian82]

Originally Posted by 06lariat4x4

rotate the driveshaft 180 degrees. you may not have lined it back up correctly.

Curious about your DIY coolant filter. what did you do for it?