Clutch Disc

[johnmi]

Has anyone heard of putting a "spring steel" between the clutch disc and lining . My clutch man says this will help clutch chatter. Thanks John

 

[Patrick L.]

If you look at various disks you'll see some that have no 'cushioning' and those with flat springs between friction faces or coil springs. If getting a disk for a model A [ or almost any other car] get one with the flat metal 'guards' to keep the coil springs from escaping.

Any with some form of absorption are supposed to help with smoothness in engagement.

 

[Fullraceflathead]

Yes, they are called a Marcel spring. they put them in between the two friction surfaces.

 

[johnmi]

Does anyone know of a Model A with a Marcel spring in the disc if so how good does it work.Thanks John

 

[40 Deluxe]

It's not a separate spring. The thin steel disc that the lining is riveted to is stamped into a 'wavy' pattern when it is made. This gives it a springiness-if you look at the edge of a disc you can see a gap between the two linings. This gives a cushioning effect as the the clutch pedal is released, so engagement is gradual, as the 'springy' disc is compressed, instead of an all or nothing engagement.

 

[Dollar Bill]

Picture = 1K words

“Marcel” is the technical term for a wavy spring sandwiched between layers of a clutch disc. This spring provides a smoother engagement and release by cushioning the clutch assembly. It’s actually named for a 1920’s hairstyle, believe it or not…