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Originally Posted by poomanchu
I have made my points and am not going to regurgitate everything. I have clearly stated when a clutch will slip, and when it will not.
I will say it again, one more time. A properly engaged clutch should not slip. If it is, it either is overheating, has a foreign item between the disk reducing frictions, is failing or has surpassed its maximum torque capacity, basically the engine is overwhelming its clamping power to lock it in place.
If your point is the clutch will not hold 100% of the time while engaged, it is failing. Yes, when you press in the clutch pedal you are releasing that clamping force.
And what exactly are we talking about now? You say it slips all the time, then no you didnt mean that, only under certain conditions, then a friction LOCK is not a LOCK. The original guy's response correcting your misinformation (as listed below) is correct.
This is still false.
This is still true
Define 'certain conditions'. I have named a few conditions which would cause a engaged clutch to clip, yet you reject or bypass them completely.
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Please reread my original post. I know that statement is false and reworded it. It now reads,
"Technically, there is always a slight amount of slip, under certain conditions, since there is only a friction connection between the flywheel and clutch disk."
I also said in Post #5 and #12 that I miss worded my original post.
How many times shall I say I miss worded it? I made a mistake! I admitted it!
I didn't purposely bypass your mentioned conditions. And, under certain circumstances, as I've mentioned, includes foreign objects, such as sand, dirt, but can also include oil, water, etc. How many of us have a leaky rear main seal? Is it possible that some of that oil can get onto the clutch? Yes. That oil would lower the total holding capacity of the clutch. What if the transmission’s front seal is leaking? Certain circumstances can also include the temp, surface finish/friction material (i.e. a new clutch and a 150,000 mile clutch will not have the same coefficient of friction), inertia of the parts, vibration, rate of torque application, the list goes well beyond my comprehension. Read more here:
http://www.pemltd.com/pdf/determining-the-static.pdf
A friction lock is not a physical lock. When someone "locks" their brakes, is there some pin or pawl that engages the brakes? No, but friction can hold the brake rotor. But since friction is "locking" (holding, clamping) the brake rotor, it can still be turned if enough torque is applied to overcome the holding power of the brake's friction. But, the brake rotor isn’t technically locked, is it?
I don't like using the word lock on a clutch because it doesn't physically lock. Does that explain it better???
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I will say it again, one more time. A properly engaged clutch should not slip.
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I agree with this. But, SHOULD means there is a chance it COULD slip!!!
Maybe I suck at writing about physics and am not typing out my thoughts clearly enough!