I didn't do a ton of driving before putting the trans mount in last year but it was friendly on the street, made lots of noise, left hard from lights, shifted into 3rd around 60 - 65.

There's a steep road near my house we crossed over before the trans mount and it shook the worst it ever did while climbing the mtn. Beats me, new parts will be ordered what I get paid next week and with any luck it will settle a bit.