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Marv D · 05-15-2017, 07:03 PM

Cap-en (said in my best interpretation of a drunken sailor). BW is dead on!
My 94 with NV4500 and hydraulic clutch is definitely constant contact, and is supposed to be. Like 63GenIII is saying,, there is no return spring,, just like disk brakes, they are designed to have a very small residual pressure keeping the TB in contact. OTHERWISE, you would have 'lash' like we had in the old mechanical linkage. That would be insane and a down right safety issue if you had to 'pump the clutch up' to get it to disengage at a stop light!

This page has a small section on the constant contact 'self centering release bearing; (what a tecnical bunch of BS for 'constant contact' bearing)
http://www.morris4x4center.com/knowl...tch-basics.htm

Oh and like mongo said, you MUST use the specific GM GL4 lube or you toast the carbon fiber syncro rings. About $120 a gallon and HARD to find. THIS is the only reliable source I've found for it. There is lots of chatter on the Mopar equivalent over at Pirate4x4

https://www.amazon.com/dp/B000QIR1V2...=2K7QIL76TDLFX

05-15-2017, 07:03 PM	#8
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: NV4500 Throw Out Bearing Cap-en (said in my best interpretation of a drunken sailor). BW is dead on! My 94 with NV4500 and hydraulic clutch is definitely constant contact, and is supposed to be. Like 63GenIII is saying,, there is no return spring,, just like disk brakes, they are designed to have a very small residual pressure keeping the TB in contact. OTHERWISE, you would have 'lash' like we had in the old mechanical linkage. That would be insane and a down right safety issue if you had to 'pump the clutch up' to get it to disengage at a stop light! This page has a small section on the constant contact 'self centering release bearing; (what a tecnical bunch of BS for 'constant contact' bearing) http://www.morris4x4center.com/knowl...tch-basics.htm Oh and like mongo said, you MUST use the specific GM GL4 lube or you toast the carbon fiber syncro rings. About $120 a gallon and HARD to find. THIS is the only reliable source I've found for it. There is lots of chatter on the Mopar equivalent over at Pirate4x4 https://www.amazon.com/dp/B000QIR1V2...=2K7QIL76TDLFX __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral. Last edited by Marv D; 05-15-2017 at 07:11 PM.