Manual Synchronized transmission for a semi truck

Did they? You can get synchronized transmission in every truck in Europe. Volvo was trying to sell them here as I recall. But as far as using clutch for start/stop only that how I drive every day.

 

Drove them in European trucks we had in Iraq.

 

Hi verdel, I believe the reason class 8 trucks have unsynchronized transmissions is to save the clutch. If you were to downshift with a synchronized transmission, the clutch would take the brunt of slowing down as the engine and road speed were matched.

 

Not using the clutch with a syncro gearbox.........not a Smart Move.

 

I was told synchronized transmission added about 500 pounds to the weight of the truck. Never understood that until I got my first over weight load.

 

Nah,around 200lbs.

 

the size of the synchronizers needed would be pretty heavy to sync the heavy gears in those transmissions. not to mention i bet they would wear out quick.

 

You can't shift a synchro box smoothly without the clutch, and a non-synchro box will shift smoother, both with or without using the clutch smoother than a synchro box, IF you know how to shift. If you don't, then you need a synchro box!

 

I rather have non sync. That gives me the option to change gears quietly without the clutch. Saved me a time or two. But you absolutely need to know what you are doing or you gonna wreck it all.

Why stop at full sync? Get a automatic if you don't wanna shift.