I recently purchased a 2007 Quad Cab 4X4 and I am very unhappy with the ride and drive. When I hit a bump in the road it feels as though the rear end of the truck wants to swing around. I own a business and I will not let anyone else drive the truck because I feel it is unsafe. At first I thought it was the tires, so I put 315 Dune Grappler's on with out a lift. I drove the truck for a week before I changed the front coils to level it and I had the same results as the factory tires, and now with the lift the same results. I tried all different air pressure's in the tires (both sets). Before this truck I had a F250 4X4 and it road like a cloud compared to this one. Please give me any advise because I am about to trade it in with only 2000 miles.

Thanks
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What tire preasure are you using?
For stock LT265 70 17 empty, I believe you should be running 50 front and 40 rear empty.
In your glove compartment there should be a load/pressure chart for your truck.
Check it out.
With the proper tire preasure my 04 2500 rides nice.
With to much air, like 70 in the back, the way it was delivered, it rode like crap and bounced all over the place.
So, you really need to find that load chart.
If ya don't find it contact DC.
This ain't no Caddy, but I do believe you are running to much preasure empty.
Good luck.