Installing Chicago auxiliary transmission

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Rajo T Speedster
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Installing Chicago auxiliary transmission

Post by Rajo T Speedster » Wed Nov 13, 2024 6:55 am

Hi
Trying to install a Chicago auxiliary transmission in my Speedster and find that it fouls the cross shaft.

Does anyone have any images of an installed transmission showing the crosshaft?

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Ed Baudoux
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Re: Installing Chicago auxiliary transmission

Post by Ed Baudoux » Wed Nov 13, 2024 9:30 am

I'm attaching a picture of the auxiliary transmission in our TT. This was built in Bob Scherzer's auto shop class in high school, when I was a student in the late 70's. I believe that the Chicago transmission requires a similar custom brake shaft.
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20241113_092820.jpg
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walber
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Re: Installing Chicago auxiliary transmission

Post by walber » Wed Nov 13, 2024 4:06 pm

I cut the cross shaft off and made a bracket that bolts to the back side of the front of the transmission (where it bolts to T transmission).
I added another cross shaft at the rear of the Chicago and put a link between the old and new shafts.

Will try to clean things up a bit and get a photo or two this weekend or early next week.


Dan McEachern
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Re: Installing Chicago auxiliary transmission

Post by Dan McEachern » Wed Nov 13, 2024 5:28 pm

We pretty much did the same thing that Walt describes above.
KIMG1397.JPG
KIMG1396.JPG
KIMG1395.JPG

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walber
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Re: Installing Chicago auxiliary transmission

Post by walber » Wed Nov 13, 2024 7:23 pm

Dan's is exactly the same concept and his bracket looks simpler. Go with his.

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Rajo T Speedster
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Re: Installing Chicago auxiliary transmission

Post by Rajo T Speedster » Thu Nov 14, 2024 7:57 am

Thanks for all the replies. I will alter my cross shaft to go below the box.
IMG_2740.jpg
IMG_2739.jpg
[attachmhttps://www.mtfca.com/phpBB3/download/file.php? ... 01969ent=2]IMG_2738.jpg[/attachment][attachmenhttps://www.mtfca.com/phpBB3/download/file.php? ... 1966967t=3]IMG_2734.jpg[/attachment]
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IMG_2738.jpg
IMG_2734.jpg


got10carz
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Re: Installing Chicago auxiliary transmission

Post by got10carz » Thu Nov 14, 2024 11:38 am

I don't know if this would work or not. Put in a TT cross shaft. Fab a spacer where it bolts to the frame, this would compensate for the difference in the height of the cam. In my mind it would lower the shaft between 1" and1 1/2".

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