[RedBKM]

I've got an annoying problem that I can't figure out. It is on two different trucks and feels the exact same. Trucks are '08 F250 (5.4L gas) and '06 F350 (6.0L diesel).

The truck is stationary and I ease into the accelerator I feel this flexing/bumping that feels like something is binding. The harder the pull the more it shudders. Opposite on braking. Right before the truck settles I feel the same thing. Seems that when the suspension twists up or down it isn't smooth. Rides fine on the highway.

Trucks have 88,000 and 129,000 so it could be anything and is likely the same component on both. I've heard of carrier bearings causing this but could be shocks etc.

Anybody out there experienced this?

 

[Motomez]

You may want to lube the slip joint on the drive shaft. They get dry and bind up. Have some one jump up and down in the bed while you look at the slip joint. If it doesn't move you may have found your problem

Good Luck
Dana

 

[ol_Blue97]

and check the u joints for joing bad and the carrier bearing if you have one

 

[RedBKM]

I just dug up a post that describes the slip joint grease issue. One guy found his issue to be a spacer in the leaf packs that was degraded. I don't see one on either truck so the u-bolts might be loose...



Sent from my Android powered Galaxy phone using Autoguide free app while I should be working.

 

[Skyd Ram]

I coudl be as simple as a u-joint starting the bind up. Do these trucks have one piece or 2 piece rear drive shafts?