Bad MMs or just normal?

[Mossdahaus]

First off, I have done the motor mount test by chocking the rear wheels and putting the tranny into gear. This test came to say that both MMs past. I have also heard of testing them using a jack...anywhere care to share?

While driving on the interstate (75-80MPH) whenever I throttle-lift or fully apply the throttle, i can feel the motor move from the driver seat. It does seems worst on decel as there seems there are 2 quick movement instead of 1 movement on accel.

Should I just go ahead and replace the front or does this sound like more of a rear MM issue?

 

[frosho]

Could be bad subframe bushings. Have you replaced them? I installed reinforced MM's in mine, and it seemed like there was still a lot of play in the driveline up until I put in aluminum subframe bushings. The old bushings were original (almost 170k miles on them) and they were in awful shape. The driveline has felt much more solid since I put in the new bushings.

 

[itwonder]

My MM's passed the published test, but nevertheless both were bad as evidenced by excessive rubbing of the TB cover on the hood pad. Replaced them, and no more problems.