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99 ford F250 ?

H

hydro70guy

Member
Any thoughts on my problem. Had to put a rebilt transfer case and front drive shaft in this truck. A week or 2 after replacing i was driving down road, when got to about 40 mph started getting a vibration like a wheel going bad or terribly out of balance. Vibration would not go away until stopped, then start again after getting up to about40 mph. Front hubs are in auto and when putting electric switch in 4x4 high vibration does not come back at all. If I take out of 4x4 the vibration came back but not till I drove it for a day.

Problem has the Amoco guy who did the transfer case work stumped, he is going to look at it Monday. Just curious what might be causing this that at least seems to be controlled by shifting between 2 and 4x4.

If I get get this fixed will i like this truck its the ford superduty F250 with 7.3 diesel

Thanks,
Joe
 
Don't know about the vibration but they will find it. Have to right?

I've got a '99SD 4x4 w/7.3, love it, bought new, 222,000 miles with no major problems, still going strong, neighbor has same one with 338,000mi.
 
The so called Ford "death wobble" in F250s and F350s.

https://www.youtube.com/watch?v=8EuQ6f8rgT4


The fix:

https://www.youtube.com/watch?v=lb3bh96FVB8


https://www.ford-trucks.com/forums/1081957-death-wobble-update.html



The most common cure:

Replace the front shocks with upgraded factory certified shocks, replace the track bar and ball joints and the steering damper. If you have cheap lift kit, go back to stock parts.
 
Check to see if one hub might be locked in and the other isn't. My 99 F250 did the exact same thing and that was the problem. Mine has manual locks on the front wheels plus the button on the dash.
 
My first fast guess is the auto hubs-most of the time people I know replaced them.They are known to suddenly engage while driving at highway speed.Mark
 
More than likely the track bar. We replaced quite a few of them. I bought 1 with 100000 miles on it, knew better, after having a mechanic, Joe, work for me for 10 years, all he ever worked on during those 10 years were 7.3's. Tranny went out 3 weeks after I bought it, then 3 weeks after that ford dealer said it needed 15000.00 to put a new motor in it. Had Joe still been around I might have kept it. Sent it to a auction - cost me 3000.00 to get rid of it.
 

Lots of info in this link

http://www.rsgear.com/support/technical-articles

If manual locking hubs are offered to me that's a good upgrade even if its not a fix... I installed manual lockers on my new to me 95 last Monday just because I did not see a need to spin all the front axle parts all the time. I could not believe the difference in how freely it rolled and no drive line noise.
 
Good chance the spindle bearing in the back of the wheel unit bearing is bad allowing the axle shafts to "flop" around and halfway engage in the hub and viberate, often times it starts when hitting bumps in the road. If locking the hubs makes it go away then 9/10 that's your problem. If your lucky the axle shaft bearing race isn't chewed up and you can replace just the spindle bearings for like 9 bucks a side, unlucky your outer stub axle and U-joints will need replacing as well.

Reach inside the steering knuckle and lift up on the axle shaft. If you can move it a bit up and down and watch it move in the backside of the wheel bearing then you have a problem, it should be fairly tight.
 
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