Clutch chatter & bowden tube

[aquifer]

I recently got my 67 together and test drove it. I noticed a little clutch chatter when taking off in first or reverse a couple times. Not bad, but a little. New clutch and pressure plate, new TO bearing, new cross shaft bushings. New cable.

I don’t recall what the recommended bowden tube sag range is, but I do remember that I adjusted it to near the deep end of the recommendation.

Will too much sag cause chatter? Or is it more likely that I need more sag?

I appreciate the advice.
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Parts needed:
Front & rear NOS or used OEM door panels for a '67 in the original Gazelle color (dark tan/light brown).

[MrGoodtunes]

(1) What's the condition of your front trans mount?
(2) How solid are the welds holding clutch cable tube in place?

[aquifer]

[runamoc]

I have found that clutch 'chatter' comes from a loose front mount.
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Daily driver: '69 Baja owned 45 yrs - Plan B: '72 Ghia
Yard Art: 2 Sandrails
Outback: '69 Ghia - '68,'69,'70,'72 Beetle - '84 Scirocco, GTI - Pair of '02 Golfs- '80 Rabbit Diesel
VW Wiring = It's just wires

[mukluk]

In addition to the loose trans mounts mentioned, clutch chatter can also be caused by grease/oil contamination of the disc, uneven spring pressure of the pressure plate, bent/uneven fingers on the clutch fork, glazing of the friction surfaces, or excess runout or tolerance stacking of the flywheel and clutch parts.

Typically incorrect bowden tube sag will result either in excessive cable drag/pedal effort (too much sag), or poor clutch feel (too little sag).
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1960 Ragtop w/Semaphores "Inga"

[aquifer]

OP here, returning to report that the chatter has been eliminated.

My bowden tube had too much sag. I removed the tube and compared the length to the original one. I also measured the depth of the end that goes over the steel chassis tube so I could accurately compare the new tube’s useable length to the original one. I removed shims to make the sag exactly the same as the original one. The sag is much closer to the minimum recommendation now, vs the maximum previously.

To clarify, I had installed new front and rear mounts, but I did double check that everything was tight based on the suggestion above. All was good, so I focused on the bowden tube.
_________________
Parts needed:
Front & rear NOS or used OEM door panels for a '67 in the original Gazelle color (dark tan/light brown).