Never drove a heavy truck with a syncro, just non sync boxes. Keep in mind a road ranger does have synchros....on the air shifted range change, i.e. 5th to 6th on a 10 speed, the switch flick is syncronized with an air shifter moving it, the main lever throw is not.
Crash box in a tractor is different story.
I run both synchro and unsynchro tractors, in road haulage no real difference pulling rolling loads on a hard surface at speed, but I don't have to clutch the unsynchro tractor, just float the gears like a heavy truck.
In the field, the crash box is a pain, very rarely can you make a shift on the move, must come to a complete stop. Synchro tractor stab the clutch and move the stick. Can even do that with a non rolling load if needed.
Powershift really shines in tillage work, upshift and no interruption of power, just accelerate, sync and unsync you come to a stop the moment you clutch.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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