26/27 Transmission Clutch/Brake Drum to Early Transmission

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fbergski
Posts: 111
Joined: Sun Jan 06, 2019 11:16 am
First Name: Philip
Last Name: Berg
* REQUIRED* Type and Year of Model Ts owned: 1911 Touring 1916 Coupelet
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26/27 Transmission Clutch/Brake Drum to Early Transmission

Post by fbergski » Sun Dec 29, 2019 6:11 pm

In the process of repairing the transmission out of my 11 touring, the original clutch/brake drum has worn lugs and I don't feel good about filing them. I do have a very nice 26/27 drum that I want to use instead. I know that I have to turn the wider drum down and use different clutch discs. What else is involved ? Do I have to use the three thrust washers? What about the inner clutch drum two or six hole version? Do I still use the early thick plate?

Thanks,

Philip


Stephen_heatherly
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First Name: Stephen
Last Name: Heatherly
* REQUIRED* Type and Year of Model Ts owned: 26 coupe and 23 Runabout
Location: St. Louis MO

Re: 26/27 Transmission Clutch/Brake Drum to Early Transmission

Post by Stephen_heatherly » Sun Dec 29, 2019 8:32 pm

You will need to use a later clutch hub with the three thrust washers. You will not need the thick disc anymore. I think the wide brake drum will fit in the pan without modifying anything. You will also need a 26/27 driven plate. The earlier one will not work on the wide drum.

Stephen


J1MGOLDEN
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* REQUIRED* Type and Year of Model Ts owned: 1926 Model T Roadster
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MTFCA Number: 14294
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Re: 26/27 Transmission Clutch/Brake Drum to Early Transmission

Post by J1MGOLDEN » Mon Dec 30, 2019 9:04 pm

I have an original July 1925 engine that has the transmission cover ears and the wide brake drum.

I was surprised to notice the bolts that hold the back plate to the drum assembly had just large round flat screw heads.

A little later in 1926, the bolts were elongated, as the hex head could not turn inside the wider brake drum area.

I suspected those longer bolts did not have the required clearance to use with the 1925 oil pan, but I have not checked.

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