Lots of hill driving quicker wear for the transmission? versus flats

Question

Lots of hill driving quicker wear for the transmission? versus flats

Answer 1

It will cause more wear if the tranny shifts gears because the motor cannot pull the vehicle up the hill in top gear. The torque convertor (depending on what type and year of vehicle) may disengage; it will save the shift but at the expense of added heat to the tranny.