Why do you Cummins guys want more gears
I’ve heard a number of Cummins fans saying they are waiting for an 8 or 10 speed transmission before getting a new truck. Why? Does the Cummins struggle to get your trailer moving from a stop? Or are ...
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noteven wrote:
Because it is MOAR! speeds?
10 speeds and more are needed to optimize gas engines.
Why not use them in diesels too? Diesels don’t care.
While both types benefit...
Actually, the other way around, gas engines are happier over a wider range of RPM. If the engine is happy between say 1800-3500rpm, you can space the gears out more than if the engine is happy over 1500-2500rpm.
Of course really with modern engines, the power output is so great we are talking incremental improvements. Probably the biggest benefit is not having to mess around with a deep rear axle ratio for all but the heaviest trailers. It used to be a choice between good towing performance vs non-towing performance if you wanted to run in top gear. With 8-10 gears, the rear axle ratio is far less important and the truck will simply select the gear ratio it needs based on loading and speed.
