2001 Boxster thump in hi-torque situations

[atomicmedia]

I'm having a problem with my 2001 US Boxster w/tip

In high-torque situations, I am hearing a thump from somewhere behind me in the center. I.E flooring it from a dead start, flooring it from 5th down to 2nd gear.

This problem started to occur, I think, soon after I accidently put the car in drive when the car was at about 2-3k rpm - my foot was off the gas, but I did hear it "thump"

The sound does not occur flooring it in reverse.

Reading over older posts, my guess is the engine mount, but:

No thumps turning, nor any shaking at 3-4k rpm. never hard to put it into any gear, nor any problems switching gears at all manually or tip.

During my oil change today, i had the mechanic look at all the bolts around the tranny and rear end, and nothing was loose.

Does an engine mount failure still make sense? would it be front or rear if the thump doesn't happen in reverse?

Thanks for any help

Edited March 9, 2010 by atomicmedia

[Loren]

check the rear swaybar mounts for tightness.

[atomicmedia]

check the rear swaybar mounts for tightness.

Would they be visible readily if the car was jacked up 5 feet? He tightened everything he could see.

[rshon]

It sounds to me like the front engine mount. You cannot see whether it's damaged without removing one of the rear splash covers on the bottom of the car, and perhaps even undoing a couple of the nuts and removing one of the mounts rubber/polyurethane side plate. The hard shifting you refer to is only a symptom for manual transmission cars...