sbc sm465 clutch question

[jkl72-40]

Howdy
my clutch when pressed is silent but when released in neutral
makes a slight spinning light whine sound not hard/strong but noticable. I adjusted it just so that it feels good before I got the motor running, its shifts fine and all is normal. All new parts. does it need fine adjustment? how? adjust the slave screw/nut
or is it normal?

 

[radioridge]

my 465 has a slight noise too. i was told by a tranny man that it was the throw out bearing and not to worry until it got louder.after 4 years it has not gotten any worse.

 

[jkl72-40]

ok sounds good to me. all parts are new and cant hear it at speed

 

[Bennett]

Your throw out bearing is rubbing-touching the fingers of the clutch. Premature wear and replacement is what I have seen on sbc setups. Try to adjust the slave rod so that the throw out bearing has at least 1/8" clearance . and does not touch the pressure plate fingers when in neutral.

When you depress the pedal there should room for the throw out bearing to move forward to depress the fingers of the pp. Yours is probably spinning and touching all the time. Several conditions can contribute to the bearing rubbing.
1. Worn out clutch fork ball on inner bellhousing ( often overlooked.. 15$ fix)
2. Too short of slave rod for adjustment
3. Not enough slave travel... can be cured using a pre 70 3 bolt brake master as a clutch master.
The pre 70 brake master has a larger bore resulting in longer travel at the slave cylinder. This is the setup I use.

 

[jkl72-40]

Hey cool thanks a lot!

 

[Downey]

Bennetts info is good, especially the part about using the older brake master for a clutch master, I never knew that???
anyway, your problem seems very typical of those using a stock Chevy clutch instead of a special Chevota clutch that takes less travel to disengage:
(a) If the bearing is adjusted to ride on the pressure plate fingers all the time, you will get full disengagement, but you will also get the ringing sound you hear before the bearing fails prematurely.
(b) If the bearing is adjusted too far behind the pressure plate fingers, you will be waisting critical travel distance getting the bearing up to the fingers, then never will get full disengagement. This will cause dragging through the gears, or the inability to shift altogether.
Evidently the remedy is to buy and install the older master cylinder, or buy and install a Chevota clutch.

 

[jkl72-40]

this is the chevota clutch set up that i got on mud. I will check the adjustment today. and get back to ya.
thanks all for the response