Tried googling it.
Found this with a camry I don't know how accurate it is about what parts to replace, but it would be something to try.
They suggest to try reving the engine while in gear and holding the brake.
or
Have you already just tried to rev the engine while in park? does that do anything? smooth out/get worse?
I can ask my dad tomorrow to as he might have some other suggestions to try. Wish I could've been more help. Have you checked your motor mounts? Any weak or broken? Check the one on the pass side in between the belts. I had the actual aluminum part of the mount break causing the engine to fall backwards. Surprisingly it was being held up by 1 bolt. Anyways, when I would turn right the engine must have twisted and would shake my steering wheel and cause a loud knocking noise. Maybe yours is just resting on it?