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Originally Posted by Ryland
Shifting without a clutch just seems like a bad idea having had taken apart motorcycle transmissions and replacing automotive transmissions and driving vehicles that require you to double clutch,
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How many of these were extensivelyshifted without a clutch? I suspect few of them, most people use the clutch everytime.
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even if you don't feel it grinding it is still causing more wear to the syncros and to the bearings because it is putting a harsh sudden load,
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If done correctly, there is no sudden harsh load. I've been able to upshift so smoothly there was no perceptible change in vehicle momentum.
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using the clutch takes all of the load off the moving gears,
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not true, the input shaft is still spinning, while it has less momentum by far than with the clutch engaged, there is still a load which has to be synched forceibly by the synchros.
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double clutching and matching the engine RPMs will also help in reducing wear but if you plan to drive fast enough that you feel you have to drive like this then please stay off the public road ways.
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not much a fan of downshifting without the clutch, I'm just not that good, and I'm not certain what benefit there is to double clutching.
I would say for those who aren't technically skillful and for whom details bore them, shifting without the clutch is a bad idea. For me, clutchless shifting on a motorcycle is as easy as pie and is actually quicker than using the clutch, while passenger vehicles are a bit trickier, but it can be done with practice and becomes a skill you pride yourself in. At the very least, having the knowledge to be able to do it should be mandatory drivers ed, even if it isn't practiced consistently.
I also know clutchless shifting to be slower in a passenger vehicle than using the clutch, and requires a bit more care, which encourages more careful driving and makes you preplan your shifts to avoid unnecessary shifting.
I think it helps you to be more attentive to the car as a machine, to making you work with it so that its design and your purposes for it coincide. To me, using the clutch everytime makes driving a manual more of a chore and less the joy it can be by at least eliminating upshift clutching. To be quite honest, I never watched the tachometer while shifting, but rather listened to the engine and learned how to do it by feel. The slight bit of excitement I get by commanding the little transmission to do my bidding with the clutch and stick is only amplified when I use only the stick. For those who know how, it is a skill they pride themselves in, and few say they wished they never had learned how to do it.
How to Clutchless Shift | eHow.com