Re: Double shifting unsynchronized manual transmission

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Posted by Ultradog MN on April 24, 2020 at 18:00:11 [URL] [DELETE] :

In Reply to: Double shifting unsynchronized manual transmission posted by Brad on April 24, 2020 at 09:14:57:

I think the issue is momentum.
Take a truck transmission - 5, 9, 10, 13 sp - whatever, and start in 2nd. Run your rpms up and get the truck rolling to say 8 mph.
When you go to grab another gear the mph may drop off to 7 but you are still in the range of 3rd gear at a lower engine rpm.
On a farm tractor your mph (momentum) drops off much quicker than a road truck - faster than you can double clutch - or shift without using the clutch.
So you just grind the gears.
All 3 of my tractors have 8 speeds.
I can shift from 7th to 8th on them pretty easily - and do so regularly,
because in 7th I have built up enough momentum to catch 8th without grinding the gears. But 7 to 8 is the only gears I can shift that way.
I do have foot throttles on two of them which helps too.


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