truck bounce

[dhanna6powerstroke]

Originally Posted by jsm

Continentals (stock)

This doesn't help your problem any. I would try different tires with the correct load range and run 55 psi in them.

[JD F350]

Originally Posted by Raul@Stealth Automotive

well said.....

mine does it too the kelderman is a great kit but your gonna be paying 8k plus for one of those... i would do a sulastic rubber shackles.... only around 350.00 and they will help a lot....

I have the same issue also unloaded... 06 supercab longbed with the stock contentals and have been looking into the sulastic kit. Anyone on board that have them? Do they have zerk fittings?

[2005F250]

I went on the kelderman site and I didn't see a kit for $8K.

[jsm]

I checked out the kelderman kit today and the rear 2 bag air ride kit was $1375 and the front was the same. I will also check out the rubber shackle mentioned. Thanks for the input.

[krazeehorse]

If you aren't running loaded you can certainly back off the air pressure in the tires some. I would probably come down to around 45 psi and see what happens there. Did you rotate the tires when you rebalanced? If not you may locate the problem child by doing that. If the vibration changes with a rotation then it is being caused by a tire or rim. The frequency increasing with speed would suggest to me that it is tire or possibly drive line related. I have a 99 and it doesn't do what you guys say yours are doing. If the tires are round and balanced you shouldn't need a lot of suspension mods unless the new trucks are different than my 99. Without a load they might pogo some when you hit a pothole or railroad tracks but going down the interstate they should be smooth.

[JBakerFX4]

There is a TSB out for this. 07-5-11. Ford will install a dampner on LR of the frame. Best par is, it's free.