I have a problem with my '99 Ram quadcab 4x4 with a skyjacker 6" suspension lift. Nothing is wrong with the lift itself, just that a 30 mph on my spedo the whole truck starts to shake. Is it due to the tires that i'm running? Which are 35x14.50x15 Thornbirds, or is there something else to look at? I've heard that the track bar isn't designed very well and i'm trying to confirm if maybe that is the problem. Thanks for anyhelp given.

 

Could be ball joints, tires out of balance, or an incorrect pinion angle at either one of the the axels.

 

http://www.solidsteel.ca/news.htm

http://www.pavementsucks.com/forums/...29849&forum=11

should provide enough info for you...

 

WHat is your gear ratio ??

 

I would look at the tire balance first then check the yokes and joints, assuming you installed the new track bar brackets correctly. You are running bias ply tires, they will not run a smooth as radials. I have used both and radials work best on the street. I had a CJ5 on 40's that I ran Boggers on the rear and SSR's up front. This is not recomended for a daily driver though. As far a tires find a good shop with the right size balance machine....... Hope this helps as I have been down the same road many times.

Later

 

The gears in my truck are 4.56, just in case anyone is wondering i have detroit locker in rear and ARB in the front. Some other info that slipped my mind. Thanks for the help though.

 

mine does this not often, but enough... only when hitting potholes at like 25-35.

therefore i am replacing my tie-rod assembly(both bars/ends)
and replacing my track bar....only because i just got done doing the
front ends...ball joints(4), U-joints(2), and sway bar end links(2).

talk about a chunk of change. after the tie rod assembly, and track bar
this thing should ride like a caddy.... plus i got new shocks, etc.