So I didn't have the time to put in my lower motor mount and so when the car was in for some service I had the shop put it in since they were working on it anyway. So, I think that I will need to put the stock one back in to sell the car - ALL of the NVH goes straight into the cabin. This is going to sound stupid but if the transmission and upper mount are on, would it be completely necessary to support the motor to change out the lower mount? I suspect the answer is YES, but the other two mounts shouldn't let the whole system drop and without a lift, there is limited space under the car to get good purchase on the bolts for that lower motor mount and even less with a jack or jack stand essentially right in the way of where you need to lie down. Just trying to make this a little easier if possible.

 

The answer is no. It is very easy to replace the lower restraint. You only need to put the car onto jack stands with enough space for you to crawl under. There are one big bolt and four smaller bolts. Two of the smaller bolts are harder to get to but with patience you can with a box wrench. You just need to rotate the drivetrain by hand to relieve the little stress on the "mount".