Hey everyone, this is my first post. Here goes. I recently replaced my rear main seal and everything seemed to go fine. After start up, and taking for a test drive i noticed a vibration when accelerating. starts at about 20 mph. when i let up of the gas it smooths out. Any ideas? thanks in advance

 

What all did you remove to replace the seal? did you unbolt any of the motor mounts?

 

I'd check that you didn't leave something loose or off center/out of place..