Drivetrain Noise
2002 SS A4, 84,000 miles. Has Yank 3600 stall converter TSP push rods, cam, comp valve springs, headers and full exhaust.
ONLY in overdrive, and usually around 55-60 mph, and only if RPMs are ~2,000 RPM, the car bucks and jumps. If i increase throttle or put it in drive, the problem stops.
Any ideas?

