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Old 03-05-2007, 08:51 PM   #1
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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?
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Old 03-06-2007, 04:01 AM   #2
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Syncronized and non syncronized
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Old 03-06-2007, 11:17 AM   #3
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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...?
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Old 03-06-2007, 02:05 PM   #4
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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...
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Old 03-07-2007, 09:33 AM   #5
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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.
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