A good not to powerfull bl setup

[hemiblas]

I would guess a lower kv motor will be easier on the tranny. Maybe a velineon 3500 or mamba 4600 motor on 2S or 8 cells geared a bit high would be a good choice. I have the mamba 7700 and it shreds trannies on my setups that cant handle brushless power. For 35mph and no harsh starting you may just want to go with a titan 12t or any brushed motor. Any brushless motor is going to have a lot of starting torque even with the soft start setting on the speed controls.