Don't worry about the engine shocks. I'm pretty sure I destroyed mine jacking my engine up. I've noticed no difference in driving or shutdown.

However I did replace the motor mounts, trans mount, differential mount, and the rack dampener. Car feels awesome no vibrations at all.

My vehicle coasts a lot better now. Why I don't know, but I'm guessing the trans mount has some job in dampening the vibrations of the engine.

My old one felt soft and smooched easily. New one was rather hard in comparison.

Replacing it was way to easy. Probably 30 minutes at best.

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-Typos courtesy of my mobile phone.