What could make my cab feel like it is 1/2 second behind the wheels or twist back and forth at a sudden small turn like a lane change? It doesn't feel safe.

 

A big bump to the front as you are turning, thus placing boosted steering when the suspension is unloaded. I have felt this from time to time on a curve near my house. Now I just avoid the pothole. Also, the back bounces a lot when going over minor undulations that are consecutive and constant.

Solution, add some weight to the back over the wheels and try not to hit pot holes on curves.

 

Sounds like your referring to body roll. It's kind of hard to avoid on a 6000lb truck with a high center of gravity. You can reduce by adding stiffer suspension components and/or lowering the center of gravity.

 

how about a rear sway bar, that should help a bit shouldnt it?

 

Thanks for the replies. I wanted a general idea of the problem before leading people astray. Here is more detail.

I just bought a Ram 2500 Sport, 4x4, 5.9L Cummings HO with 6 speed manual transmission and drove it about 700 miles on worn stock sized (245/75R16's) tires. I drove it mostly on the Interstate including the entire West Virginia Turnpike where the Interstate is curvy, but you can maintain 55-75 MPH speeds. It handled fine in the curves and lanes changes. I bought new GoodYear Wrangle ATs that are 265/75R16's. I got on the Interstate and coming off the exit ramp and doing lane changes feel awkward. The new tires are about 1" taller. I checked the tire pressure and had 75 lbs in the front and 80 lbs in the rear. The only other time I felt something similar was when I overloaded my old truck. I don't know if diving or skating are the right terms, but I've been searching for similar descriptions. I don't know if something broke recently or if the tires could make that much difference, but I cannot imagine pulling 14,000 lbs if the truck feels this bad alone!

 

try taking about half the pressure out of the tires, I dont believe they were ever intended to be that over inflated...

 

I expect those are LT tires. With that heavy of a truck you might be experiencing too much sidewall flex. Also, if vipersforsale indicated, you are probably on the verge of blowing a tire from overpressure.

 

55-80 pounds is about right for the tires that go on the 2500. due to the weight of the engine alone the tire pressure in the front is higher.

you can try and lower the pressure, but I wouldnt go below 50-55 pounds.

I have the off-road package on my truck, body roll is just about non-existant.

but then again it could be the new tred, the tires are more pliable and not as dry as the old ones.

 

definitely reduce your rear tire pressure by about 20-25. have you checked for a leaky shock? also, keep in mind that you are turning 7000 lbs at 70 mph and you have slightly raised your center of gravity.