I am currently having the same issue,when accelerating, just not as severe as what you are describing. Mine is just 1st and 2nd, with the slightest shake. I was wondering what you did to solve the issue, if you did at all.
Scratch that, front right caliper has started to stick, all the fuss over something simple.
I had the same problem did everything including the tranny never stopped so i sold the car.
hahaha i just 2 have the same problem, mine was in 1st and 2nd, the moment i lift the foot of the accelerator it start shaking in a scandalous way, I tried everything, supports, pallier, alignment, I even cursed it, finally after I lost any hope I changed the air filter, cleaned the injectors and that was it, I know it sounds kind of stupid, I thoght it was a problem with the engine, suspension, i don’t know, anything else, but they told me that the moment a stop accelerating it created emptinesses cause my filter was so dirty I was embarrased (HKS green, but it were actually black), now I put 1st and go extremely slowly and nothing, it doesn’t shake at all xD
PD: sorry 4 my english