What's the difference between a family truck and a Class 8 trucks transmission?

[BravestDog]

What's the difference between a family truck and a Class 8 trucks transmission?

Why is it that with a family truck, you can shift it normally, accelerate, push in the clutch, shift...but with a class 8, you must shift without a clutch and time it with the RPM.

What makes the Class 8 transmissions different and why are the Class 8 transmissions like that? Why can't they function like a regular sized trucks transmission?

 

[Camping Dutchman]

Syncronized and non syncronized

 

[BravestDog]

So the family truck would have a syncronized and the Class 8 would have a non syncronized transmission?

Why would the Class 8 have a non syncronized transmission?

Would it be the cost to manufacturer such, impossible to build...?

 

[Camping Dutchman]

I believe it's the other way around. I just learned that term when I had my trans redone in my FL70. Found out it's not syncronized...

 

[Wick-TC]

BravestDog,
You can use the clutch on the class 8 but you still must match the rpm's. The class 8 transmission has syncronzers as well but they do things a bit differently. I have never been told why they do not make them to operate like the smaller transmissions. I would suppose that it has to do with the size and load they handle as well as making something that will go a million or more miles.
Wick