I replaced the orignal tire which were Michelin LTX A/S with Michelin LTX M/S hoping to get better traction in mud and snow. These tires make the truck drive squirley, I don't know if this will change overtime but changing the tire pressure doesn't seem to help. Any ideas? This is on a 99 2wheel drive. Tire size LT245/78 R16 Load range E.