Super duty 10 speed gear ratios
Very similar to the 1/2 ton ratios. They are probably all excellent but my personal preference is that they would have left reverse as a higher speed. I think it was 1:-3.4 in the 6 speed Super Dut...
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Grit dog wrote:theoldwizard1 wrote:
Because of the design of the internal planets, carriers, etc, there is really very little opportunity to play with ratios. My guess was any changes were made to increase the "durability" of the transmission.
I am a bit surprised at the step between 1st and 2nd !
It's not surprising, it's normal if one understands gearing.
In short, if a gear ratio is doubled at say 10 mph, the result at the same rpm is 5 mph.
Double the ratio at 100mph and the result is 50 mph.
That's why a say 10% gear change at higher gears = a certain rpm change and a say 80% gear change at low gears = the same rpm change.
Notice the decrease in % ratio change in each step from low to high.
I'm beginning to understand why some folks think more gear ratios are "dumb" or unnecessary. It's becasue, based on some of these responses, they don't understand what's going on beyond, push skinny pedal = faster, release skinny pedal = slower.
Not the mention of the ability of second gear starts when the low first gear is not necessary.
