Car shudders on acceleration
When accelerating at higher speeds (over 50) the car starts to shudder, in direct proportion to the amount of gas I give it. If it take my foot off the gas, the shudder stops. Just easing up and maintaining speed the shudder stops. No shudder at all going even 75 downhill with no acceleration.
I replaced engine mounts. No change. New air filter, breather and PCV, no change. Rebuilt transmission with 30,000 on it. Thoughts?