Well after changing the plugs on the car to the autolights (one stage cooler) being that the old ones was well over due . The problem im having is before i thought it was surging in the 40mph range , now it seams as if it is slightly there at any speed just as long as my mph are steady. if im rolling on the throttle you never feel it . I was thinking it could of been my solid mount but after listing out side the car it is def the engine . It sounds just like a mtx car around a turn at 20 mph in third , now it goes away if im on the gas any. Im thinking it is in one to high of a gear and when i give her some gas SHE will tune rt in . After all the searching i see this could be a few things . So any advise is well appreciated.

Said vibration. Is not present with crude on

Sorry I can't figure out the edit button. That is I can't feel vibration with cruse on

Could a newb. Please get some advice. I'm stumped

Do you see any change on the tach?

Not that was anything more than I was giving it. I guess I will spin it when the storm passes and pay more attention to rpm. Thanks

If your feeling a surge I'm willing to bet you have a bad trans mount.

It make a faint, I'm in the wrong gear sound until I roll the throttle more and it shifts down. Then it seams perfict

Hold your foot on the gas to keep a constant speed, at about 50. This should have you in 4th with the torque converter locked. Then push the brake peddle down. Your RPM should go up a bit when the torque convert unlocks. If not your TC my be going in and out of lock up.

Is there a fix for this other than replacement? Tcc ?