manual trans

[69TowRig]

Used to be double-clutching was necessary to slow down the input shaft in the transmission before the next gear selection was made (no synchronization). Modern light trucks and autos are all synchronized so there's hardly a need for that anymore. I would suspect that for big trucks that have big transmissions it is more a matter of wear on the transmission components, I would figure that they are synchronized but when you figure all that mass of the large gears and shafts spinning you would want more than just the synchonizer cones to do the work of speed-matching the transmission components? Anyone else have any theories?

I agree with the above that once you get used to a vehicle you can "float" gears no sweat. I have been able to do it with just about every stick shift I have ever driven.