Vibration after Th400 install.
Been having vibration issues after a recent rebuild of my TH400. I've had it off and apart with no issues before, but after a recent rebuild, new flex plate, and new torque converter, I am having vibration issues.
I unbolted everything today, and slid the trans back about 1/2", and rebolted everything up to make sure nothing was crooked.
Everything seems fine. The torque converter has about 1/16 gap between the mounting pads and flex plate. Spins freely when unbolted. The T/C bolts start right in with very little effort to line the holes up.
The vibration isn't driveline, it does it with it in park, at about 1,500 to 2,500 rpm.
What might I be missing here??