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  #1  
Old April 21st, 2005, 09:58 AM
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viscous coupling

too burnt from the holidays to search. when I turn off the truck should it be hard to turn? I thought I read it would be at some point in the past but cant recall. thanks peoples
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  #2  
Old April 21st, 2005, 10:08 AM
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It should be hard to turn when the engine is warm, and easy to turn when everything is cool. Best to check it before starting in the morning, then take it for a drive, when it warms up try spining it again, it should be much harder.
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Old April 21st, 2005, 11:14 AM
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i tried to turn it when its hot and it spins freely, there is some shop time on the horizon anyways just add to the list i guess. thanks.
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  #4  
Old April 21st, 2005, 03:32 PM
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In my experience a viscous coupling is much preferred over a non-viscous one, regardless of the degree of "warm-up".

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Old April 22nd, 2005, 10:36 AM
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The viscous coupling won't necessarily be hard to turn even when the truck is hot, it depends how much difference in motion between the front and back wheels you had when driving.

If you have a trolley jack, an easy way to test it is to jack up one of the front wheels (just off the ground), and VERY SLOWLY AND GENTLY try to drive. If the viscous coupling isn't working you won't go anywhere, if it is working properly it should lock up after one or 2 turns of the wheel of the ground and the rear wheels should start to drive.
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Old April 22nd, 2005, 05:29 PM
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Ben, they're talking about the viscous coupling that drives the radiator fan (the "fan clutch").
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Old April 26th, 2005, 07:03 AM
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Quote:
Originally Posted by Trevor Tarr
Ben, they're talking about the viscous coupling that drives the radiator fan (the "fan clutch").
Ahh... Thanks Trevor.
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