i have a 90 f150 4x4 and i have a death wobble has brand new hubs brand new ball joints brand new wheel bearings and brand new radius arm bushings what else could be causing this... lifted 8 inches with 36 inch super swamper tsls

 

try throwing a steering stabilizer on there. i had a jeep with super swampers and it had a terrible death wobble. the steering stabilzer dampened it out but not all off it. do you have leaf springs in the front or 3 or 4 link.

 

what about king pins?

 

Steering Stab is a must if ya dont all ready have it...with 36's I would look at a dual set up.
Do you have a drop pitman arm or stock? I will see if I have some of my info I had on steering geometry on Fords....If it aint right it causes alot of issues.

 

Not trying to sell anything,no affiliation.....scroll on
http://bronco.zenseeker.net/Steering.htm

 

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my truck has independent front suspension which has coil springs....yeah i know i need i dual steering stabilizer but i had those swampers running with no problems until all the sudden it started and i wanna get it rolling right before i put a steering stabilizer on it... and whats king pins i dont think my truck has that and i think it has a drop down pitman arm

 

The info you need is all the way at the bottom of that link.

I'm thinking with the lift you have the caster has been pushed closer to "0" and with all the new parts it needs a good alignment.

As mentioned a steering stabilizer is good idea with your tire size, but it is a band aid, not a fix. The stabilizer will take some stress off the steering system caused by the big tires.

 

yeah i wanna get the stabilizer after i get the real problem fixed..it all started after i hit some little bumps on the road and its never been the same i replaced two tires thinking it was the front tires but i guess i can try getting the front end aligned and then ill let you guys know... and my driver side wheel has positive camber you think that would my it have death wobble

 

If you are running 8" of lift with stock length radius arms, you are basically rolling the front end under the truck. It's like trying to run down hill on your tip toes, any little thing will throw it off.

With that much lift you need to have the radius arm mounts on the frame either lower or moved way back with longer arms. That would get you back to a normal caster.

At 8" you are pushing the limits of the TTB front end.

 

its a 4 inch suspension lift and 4 inch body and it does have drop down brackets for the radius arm i know that for a fact

 

My bad!

 

how new are your tires. they may be way out of balance i could never get my super swamper SSRs balanced. silly as this might sound it might be something to look at.

 

its all good i appreciate the help though and yeah the ones on the front came on the truck but when i had two new ones put on rims the guy couldnt get those balanced so i put em on the back and the older ones where still balanced.. i put 35 bf goodrichs on there and it did it once but then didnt do it anymore so..

 

Ask for the beads or go to a shop that handles bigger tires like a good 18wheeler shop and get them trued and balanced if there is a massive amount of weight needed to balance them. I have learned to like the beads in bigger tires...they make a huge difference.