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Clutch slips less when hot?

 
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Old 08-16-2009, 07:39 AM
gfl
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Clutch slips less when hot?

Any ideas? for example backing up a heavy trailer, I can ride the clutch just fine when its relatively cold, but after a long tow, it kinda jerks like its not slipping like it should when lightly riding the clutch to back it up
 
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Old 08-16-2009, 09:51 AM
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For the same reason that a serpentine belt that's just starting to fail only squeals when it's cold, and stops slipping once it's warmed up.

Hot materials tend to get stickier than they are when cold.
 
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Old 08-16-2009, 01:25 PM
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I'd think if the clutch were beginning to fail, it would slip more when hot or after some use? but then fortunately I haven't had too much experience with losing clutches.
 
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Old 08-20-2009, 09:55 AM
robert albright
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When the clutch plate, pressure plate, and flywheel get hot, they all expand or get larger, or thicker in this case. Because they are larger in size (thicker) the pressure goes up due to the tighter tolerances and the clutch does not slip as much as when cold. Cold clutches slip more than hot clutches. Hope this makes sense.
 
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Old 08-20-2009, 10:55 PM
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It makes sense, I wasn't sure if it was normal though. This is my camping truck and I'd hate for the clutch to let go up in the hills. thanks for the reply
 
 
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