The Ford Barn

Automotive Stud · 07-11-2023, 08:45 AM

I figured this would be a common talk, but when I searched I found a lot of info on going to open drive and not the other way around. I have a few F-1 top loader open drive transmissions. What's involved besides the rear mount to convert the transmission to basically '39 spec torque tube?

cas3 · 07-11-2023, 09:37 AM

you need the main shaft thats proper for the gear set you wish to use

Zeke3 · 07-11-2023, 09:38 AM

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You will also need to change the main shaft to something like a 81A-7061 that is compatible with the rest of your gears and the u-joint and attaching hardware for the u-joint. I use the tables of information in Mac Van Pelt’s transmission book to identify the individual components and compatibilities.

07-11-2023, 08:45 AM	#1
Automotive Stud Senior Member Join Date: May 2010 Location: New Jersey Posts: 832	Convert F1 transmission to torque tube I figured this would be a common talk, but when I searched I found a lot of info on going to open drive and not the other way around. I have a few F-1 top loader open drive transmissions. What's involved besides the rear mount to convert the transmission to basically '39 spec torque tube?

07-11-2023, 09:37 AM	#2
cas3 Senior Member Join Date: Jan 2011 Location: sw minnesota Posts: 4,578	Re: Convert F1 transmission to torque tube you need the main shaft thats proper for the gear set you wish to use

07-11-2023, 09:38 AM	#3
Zeke3 Senior Member Join Date: Dec 2014 Location: Columbus, IN Posts: 1,407	Re: Convert F1 transmission to torque tube Sponsored Links (Register now to hide all advertisements) You will also need to change the main shaft to something like a 81A-7061 that is compatible with the rest of your gears and the u-joint and attaching hardware for the u-joint. I use the tables of information in Mac Van Pelt’s transmission book to identify the individual components and compatibilities.