time2roll wrote:
So it is not entirely the transmission... Extra 12 percent torque makes a difference too.
3.55 to 4.10 is 15 percent.
Put both behind the same engine and the 4.10 to 3.55 is not as exciting.
That is the whole point. The greater engine torque output and more gears you have, the shorter rear end ratio you are able to run without sacrificing capabilities.
Take my Ram for instance. Since torque output of the Cummins 6.7L has increased from 650 lb-ft in 2010 to 800 lb-ft in 2014, my 2014 with a 3.42 axle ratio is putting down more torque to the rear wheels in every gear than the equivalent 2010 Cummins with a 3.73 rear ratio and the same 6 speed trans. The concept is similar to "downspeeding" that it has been used in the heavy duty on-highway world for years to increase fuel efficiency.
