I have a 94 f150 5.0 I recently replaced the pitman arm all the way to the tie rods also 2 days ago did the radious bushings due to thinking that was the problem.
I did an alignment on it ... Its not perfect but close...
And for the problem from 5 to 30 mph theres a slight bounce in the truck... From 30 to 40 (intermitanlly) it bounces so bad I was coming off my seat abd **** was falling off and out of cubby holders... I thouggt my truck was going to shake apart...
Over 40 mph all the way to 65 it drives like a dream...weird
Im pretty much had it with this thing I want to drive it into a river .
Any help please
RB

 

out of alignment, mine does it all the time. i'm great at eye ballin it now lol. have to do it about every 2 weeks.

exact same symptoms you have too. if you can handle the bouncing enough to power through the violent quakes. it rides like a dream.

most of the problem is the big mud tires on the TTB axle. coupled with offset wheels.

 

and if that is you flexing your ford in the pic, that doesnt help the alignment at all.

 

Yeah thats me ... I put a 6 in on it... I figured it was a alignment issue.. Also thought wheel bearing or ball joint
Im going this week to get it aligned ill let ya know if its still there

 

tires out of balance can cause it too.

 

I thpught aboit that to.. I did them myself so I assume there good.
I did notice there are some cracks in the rubber of the tires? That cause anything maybe a band split?

 

air pressure can have an affect there too, but I agree with the alignment and tires.

 

sounds like a bad tire. you can probably rule that out by looking at them or rotating them. if they are aluminum you might have thrown off a stick on weight or if you just went mud riding in clay you might have a dried mud chunk in the wheel causing it. Ive seen that happen before

 

If you've been 4 wheeling, mud might be caked on the inside of your wheels making your tires off balance. It happened to my truck once.

 

DEATH WOBBLE IS AWESOME!!!!!

Another thing to check to is make sure all your drop brakets are tight mine did it all the time cuz my lift drop brakets would all come loose. Tightened them all up and then it would be fine so got the ****s of doing it all the time and just red lock-tightened the ones for the passenger side and then welded the one for the driver side. Plus doubled nutted all the bolts. Haven't touched them since.

For checking if it's the tires look and see if any of your tires on the front are worn wrong and switch it with a back one that looks good. See if the shake went away.

Bad bearing will through it into death wobble to.

Bad tie rods

Bad ball joints

Bent rim

Loose pigment arms.

Worped rotor.

Bad axle bushings.

Bad alignment

Outta balance tire

Lugs not tight

A Bad shock

Tire pressure uneven

Perty much anything that will through one side of the front axle out of balance with the other side.