whenever I lift off the throttle, with the clutch pressed it, I can hear the whole car/engine shake a few time sounded like a marble in a box shaked up a couple time, idle fine afterward, no stalling no rough, only when I lift off the throttle, the moment I did, I can hear the noises, if driving in gear and lift off throttle, I can feel the car bog/stutter once or twice. what could be the issue, I brought it to Mitsu dealers a few time, no answer.

Car is bone stock.
Thanks in advance

 

Are you venting to atmosphere?

 

Imput shaft in the tranny or throw out bearing.

 

I have stock MR BOV, no VTA