Try loosening both engine mount to frame bolts a couple of turns, run the enigne for a few minutes and turn it off, then torque the engine mount to frame bolts to 30 ft/lbs. Replacing the transmission mount may help if it is worn out.

I expect that you removed both engine brackets in the process of replacing the engine mounts and torqued the engine mount to engine bracket bolts to 41 ft/lbs. Also, the engine mount alignment tab needs to fit in the slot in the engine bracket.

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Fred Hoelzle