Shaking at 45 to 55 mph

The shaking comes at 45 to 55 mph and it's really bad and ones I pass 55 it stops n feels ok and then when I start to slow down it does it again right at those speeds and mind you I took it to get an alignment and it's worse so wat could it be

 

Your truck just hates going slow….


Tire balance
Alignment
Worn steering components

Can’t think of too many other things that would be suspect here.

 

id get your wheels balanced maybe the weights fell off.

 

Wheel bearings, ball joints will do that too

 

Can you feel it on the steering wheel or seat..??

 

I have the same thing going on. Can feel it in the steering wheel. Tires balanced and rotated then rotated back. Had the truck since October. Steering has always felt like it wasn't as tight as it should be. Thought about some type of steering stablelizer when or if I can find what's causing the shaking.

 

Get a road force balance.

 

Mine were road force balanced. What's the difference in feeling it in the steering wheel vs. seat?

 

Steering wheel vibe is usually front end , tire issue, Seat vibe is usually rear tire, rear end, drive train issue..
https://www.tirerack.com/images/tires/vibechart.pdf

 

Makes sense. Thanks