Truck shake violently at 55 mph

[mferguson]

I have a 97 f250, it just started doing this. When I get up to about 55 it starts to shake like crazy. If I get up to about 80 it will stop shaking and then i can slow down to about 65 and it won't start shaking again until it goes below there. The entire truck is shaking, its not just the steering wheel. It's a pretty violent shake. Any ideas?

[viper5b]

im having the same issue. got the truck stuck in the mud 2 weeks ago and it started doing this. i get a slow almost unoticeable wobble/bouce at 30 and shaking at 55-62, and 70+...mine in kinda oscillating though...will do it for 30sec-2min the smooth out for 1-3mins

[Term3]

A bent drive shaft can do weird things.


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[TulsaDave]

Have your tires balanced.


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[Bryan Liddle]

I had the same problem but the shaking would start around 30 mph, I jacked the truck up and put it in gear while ideling, I noticed the drive shaft wasn't running true by the back axel so I put in a new universal, but I noticed that it didn't fit tight in the yoke? I had the same runout. Had to replace the bearings in the punkin along with the gears because they were worn too much.

[xjaddiction]

The one that was stuck in mud, check inside wheels. Mud will pack on rims and throw weight off. Wobbles like crazy.

[351fifty]

check your carrier bearing, u joints, bent axle, and un balanced tires, these all can kause this

[Blazin8556]

I agree with everything. Thorough inspection, good jack stands, wheel choks. Flashlight. Be safe doing the inspect tho.