PSN Been daer dun it!
Towing a tractor today...I noticed a shudder while driving. It gets pretty pronounced in the whole truck. When I would make it shift out of overdrive...it would stop. Doesnt do it without a load behind it. I am towing with a SCT street/smoke tune. But it was only about 7k lbs. Have towed it many times without this issue. Its kind of a pulse/shudder..any ideas would be appreciated!