[ejpowerstroke97]

Okay, brought the drive shaft to a driveline shop and they don't see anything wrong. They said the hanger bearing is like new and the diveshaft is not out of balance. Four new tires, three new u-joints, new torque converter. Now remember from previous posts that you can fill it from about 35-50mph witjout a load and with my utility trailer from about 20-55 mph. What else can it be? I am on the verge of trading it in just to get rid of the problem. Please any help would be appreciated. Thanks for the help in advance.

 

[psu927]

Tires by any chance? I have seen some pretty bad vibrations just from tires, even though they might not look bad. And I'm sure you had the truck aligned correct? Wheels balanced?

 

[frmrdieseldriver]

try rotating front to back to see if it changes

 

[MADVAN]

I have seen the same problems.
Had 1 that was a rear brake drum.
Check rotors and drums.

Bill

 

[action4478]

Just wag here...Take alook at the balance weights on the rims....How many separate weights do you have on each rim...Out side & inside...

When I got my truck it rode TERRIBLE..I pulled the hub caps & took a look at the weights. I some places where they needed 3.5 oz, the installers had used 3-4 separate weights ,sread out over 4 or 5 inches.The correct proceedure would be (1) 3.5 oz weight, which they obviously did not have so they thought many would do the same thing. I took all the weights off untill I had a chance to balance them myself & the ride was remarkably improved with no weights. If you have bigger tires, you need to have them balanced at a place that is used to doing big tires....

Mine shook so bad the speedometer didn't work right....

 

[PSDfreak]

[ QUOTE ]
Just wag here...Take alook at the balance weights on the rims....How many separate weights do you have on each rim...Out side & inside...

When I got my truck it rode TERRIBLE..I pulled the hub caps & took a look at the weights. I some places where they needed 3.5 oz, the installers had used 3-4 separate weights ,sread out over 4 or 5 inches.The correct proceedure would be (1) 3.5 oz weight, which they obviously did not have so they thought many would do the same thing. I took all the weights off untill I had a chance to balance them myself & the ride was remarkably improved with no weights. If you have bigger tires, you need to have them balanced at a place that is used to doing big tires....

Mine shook so bad the speedometer didn't work right....

[/ QUOTE ]

Agreed...A lot of times Vibrations are caused simple by a tire thats not balanced correctly or a tire that has too much "road force." Actually went through this myself a couple years ago...Brand new 35" BFG A/Ts truck shook like a mo-fo between 60-70 mph. Had it balanced THREE times before it was right. Ended up have a place that knew what they were doing put a DYNAMIC balance on the wheels (weights on inside AND outside of wheel).

 

[Nit]

are you absolutely sure it si not in teh front end, as the F250 with worn bushings and bad alignment vobrates like hell

 

[94strokerace]

[ QUOTE ]
I have seen the same problems.
Had 1 that was a rear brake drum.
Check rotors and drums.

Bill

[/ QUOTE ]
I had a vibe at around 45mph and drove me nuts. Did a 4 wheel brake job, not because of the vibe, but fixed it. Not sure if it was the front or rear or combo since I replaced both rotors and both drums at the same time.

 

[bosefes]

Check the nut that holds the yoke on the rear of the tranny/transfer case. Mine came loose a few years ago...

 

[Diesel_Aggie]

Does this driveshaft shop have a balancer? Many don't and I wouldn't eliminate the driveshaft until it had been balanced.

I had the yolk where the driveshaft attaches to the rear end cause a vibration on one of my trucks due to wear. Also had one due to tires.