Horsepower and Torque

[usbusin]

Here is an interesting article I ran across about the development of "downspeeding" in the post 2010 engines.  Interesting read.

https://www.truckinginfo.com/155916/powertrain-specs-more-science-than-art

[Moresmoke]

What’s old is new again. Went through this back in the early ‘90s with the family fleet. We were still running direct drive transmissions because you could net a bit more fuel economy. But driveshaft problems started showing up with faster rear ratios. Finally gave In and went to overdrives, which also had the benefit of slowing down reverse.