New Tires no Change

[mike burns 3]

I have a roar and vibration when I coast (slow down) after about 50mph. I thought it was tires but they check out. The CV joints look ok. If feels more like its coming from the center of the truck but its hard to tell.



Any thoughts?



Truck is a '01 4X4

200K miles

 

[Les]

Check the rear end.

 

[mike burns 3]

How do I check the rear end?

 

[RedRanger 7]

Clutch fan kicking in on engine? They make a good roar!:banghead:

 

[Travis Stevens]

could be a driveshaft vibration, how long since you replaced the ujoints?

 

[EddieS'04]

The vibs might be the u-joints. The roar could be pinion bearing.

 

[Mike Yatkowitz]

 

[Mike Yatkowitz]

I would also check the front wheel bearings.

 

[mike burns 3]

Found it ...........



One of the 4 bolts that bolts to the front U-joint to the transfer case flange was missing and the others were very loose. New bolt and torquing them down fixed everything.



Not sure how the "mechanic" that looked at the drive train missed it!