02ctd4now

I did a search and found not much info. The front bounces at 40mph weather excellerating or decelerating. Also does at 60mph, just not as bad as 40. I put new edelbrock shocks on a few miles ago, just had it inspected in June, all joints are good, bouncing didn't start till i put the 35" hankooks on. I also used the dynabeads balancing beads for the offroad tires. I messed with tire preasures, and no change. The back doesn't bounce, so i know the beads are doing their job. I was told by someone who had an 03' that it is the geometry of the front end, and there is no way to correct it, just install all the steering upgrades like track bar, duall stabilizers exc... to stiffen up as much as possible, and kind of hide it so to speek. He installed the thuren track bar, dual stabilizers, new ball joints, new steering box, all steering joints, and his got signifficantly better, but didn't totaly go away. He said the same thing about starting when he put 35's on. Is this pretty much the case, or is there something deffenatly out of spech that we are missing? Any advise will help. I also have the 2" spacers in the front. Oh yeh, i am talking about my 02 2500 4x4 6sp. I was just referring to the my freinds 03 as a reference of the same problem i have. The bouncing varries in intensity from day to day as well.

dozer12216

Typical of radial runout. The speeds are correct for the issue to show up.
You will probablly find both tires with excessive runout. Anything over .045 is questionable and at .060 most any tire will cause shake. If runout happens to be acceptable then it is caused by radial loaded runout. This means the stire does not hold the spindle at same height as it turns. Say the spindle is 15.00inches from ground and then turn say 90 degrees and now the spindle is 15.07 inches from ground. The tire will move the spindle up and down .070 inch each revolution, hench vibrates. Replacement is only viable cure for either condition. Balancing cannot correct, it is a defective tire. However tire retailers walk away, cause warranty is difficult.

Katmandu

That's proof that you're tires have flat spots.

Swap them front/back and see where you're at.

When was the truck last aligned ?

Mzgz

Mine does the bouncing from 40 to 43 mph. Drives me crazy. I have changed tires, rims, shocks and a number of other things. It didn't start doing it until the day it reached 100k miles. Mechanics can't find a reason or a cure. This is one I think I have to live with. Love my truck and have had only 1 other problem, the tcs. I literally unplugged it, cleaned the contacts and plugged it back in. Problem solved.