On a steep uphill pull in the summertime, set the throttle wide open in whatever gear it takes to pull the hill at walking speed or so, then climb out on the running board to steer and get away from the heat inside the cab. I've seen pictures of big rigs pulling the Grapevine Hill in California that way.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!