WOW, Wish I would have....
...purchased the right truck the first time. First run today with new to us GMC 3500 and WOW. The difference between the GMC and F350 is night and day. Truck pulled our fiver over same hills that o...
Forum Discussion
blt2ski wrote:
As far as actual STEEP grades go, I have found more 20+% grades at sealevel locally than I have at elevation! Steep grades in and of themselve need torque mulitplication which is LOW gears in the trans and to a degree axels. A 400 lb.ft motor with overall ratio of 24-1 and 31" tires will go up a steeper grade than a 600 lbft motor with 16-1 by about 5%. Which the latter is my dmax vs my old 6.5td! Put a 400 lb ft motor at 16-1, and the best you will do is around 12-16%. Been there done that, stalled a few rigs out in the past. Freeway grades are way the heck different than short steep grades.
I have yet to find a freeway grade that truly bothered me. Even the ones with major turny switchbacks. Now Queen Ann ave on the north side of queen anne hill in Seattle at 100-300' elevation, or Garfield on the east side of QA hill, those will get the pucker factors going up!
Marty
What about 800+ lb ft at 16-1 and still be over 400 hp?:p;)
