So I was wondering, and I won't say how so a bunch of people don't go blowing up tranny's. If you know how to do this; and there's no resistance, no grind, it feels completely natural, can this harm the tranny and/or anything else?

 

I wouldnt think so as it means everything is synchronized which is the main point of a clutch. This is how most truckers used to change gears,

 

If you have a deft touch and know exactly what your doing, then no it will not hurt it.

miss it once and the last 100 no-clutch shifts were a waste.

 

Even if it doesn't feel rough, you are asking the synchro rings to do a lot more work than if you use the clutch, and more work = more wear.
What's the point? If you treat the tranny right it should still be going strong at 200k miles, but you'll almost certainly need a clutch much sooner (like maybe 3+ clutches in that time). Do you really want to accelerate a tranny rebuild or replacement?

When you say there is "no resistance, no grind" do you actually mean that you can "sense" the matched speeds? Most people that try this usually hold light pressure on the shifter until the speeds match and it "slips in"; but during that "light touch" you are heating up the synchros.

I repeat, what's the point?

 

I thought it would hurt thetranny. I never tried shifting w/o a clutch before

 

Its kind of a good thing to at least have done once or twice for when your clutch goes out and you need to get the car somewhere.

 

They put a clutch pedal in the car for a reason. I strongly promote its use unless you really like replacing transmissions.

 

If you don't know what you're doing, it definitely will. Don't try it.

 

Even if you're perfect, the rings take a hit being pulled out.

 

This. My friend's clutch died 50 miles from home and we got home just fine without the clutch. But not recommended for daily driving. Sacrificing your synchros to save your clutch doesn't make any sense.