Just recently, Iíve been experiencing a single thump in the tunnel between the front seats. It only happened on initial acceleration from a stop. Now it might do it twice....and I can now also hear it once when I brake hard. So it sounds like it may be getting worse.

Iíve searched for possible causes but have ruled out most Iíve found. I had an adjustable BMR torque arm installed about 3 years ago. Also an energy suspension trans mount. Iíve made sure all bolts are tight on the torque arm mount and on the rear end. I just replaced the trans mount to a new one.....but it still thumps.

Any other thoughts????