MTFCA Forum

I think that’s what you call them. And I have several of two different diameters. Will someone please advise me which is the ‘26-‘27 and would the other be appropriate for ‘09-‘25 ? Thank you…

These are for the brake drums correct?
26/27 wide drums the plate fits inside the drum.
Narrow drum plates have a lip on them that fits into the drum.
Hope this helps.

The inner plates are the same, except for the one extra thick disk for brass era clutches.
The larger OD disks have outer notches to fit into the 6 brake drum tabs. The drums with the removable tab shoes are cut flat on all 6 outer edges between the notches. Earlier outer disks have only 2 of those flat edges cut. The 26-7 outer disks will fit all years. the earlier disks wont fit the later, shoed drums.
You cant say "26-7 outer disks". In early wide drum production, the replaceable shoes were not used. Some time in 26 all wide drums & replacement narrow drums got the replaceable shoes.

I was thinking about the driven plates. The ones that go on to the brake drum. The three fingers mount on them.

Sounds you were asking about the clutch disc.

Here is a picture of two on the left for a 26/27. I just bought the one on the left from Jim Golden on the site.

In that case, 26-7 (wide drum) are smaller diameter. They fit into & under the drum surface.
Narrow are larger in diameter. The outer edge has a step & is actually part of the drum surface.
The larger/narrow output plate can be cut down & bolt holes modified a bit to be used on a wide drum.
So, the mounting hole pattern is slightly different. The wide drum plate has/had smaller holes for the smaller 3 finger pins.
There is also an odd/rare version that fits the narrow, replacement drum for the replaceable shoes. with a different hole pattern & lipped edge.

Thanks for the information Dan, John and Jim.