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Seth Swoboda · 09-14-2023, 12:51 PM

You'll need a 48 or 78, V8 Ford transmission case. Plus you'll want the '39 double detent transmission cover. It's not quite as simple as it seems but can be done. Also, you say "I've got some '39 gears", what cluster and main shaft do you have? Also, what gear ratio do you have in the rear end? You cannot simply start mixing gears. I suggest you get Mac Van Pelts V8 transmission rebuild book and study these transmissions first. Knowledge is power as they say.

09-14-2023, 12:51 PM	#13
Seth Swoboda Senior Member Join Date: May 2010 Location: Southern Illinois Posts: 3,831	Re: 39 gears in Model A drivetrain You'll need a 48 or 78, V8 Ford transmission case. Plus you'll want the '39 double detent transmission cover. It's not quite as simple as it seems but can be done. Also, you say "I've got some '39 gears", what cluster and main shaft do you have? Also, what gear ratio do you have in the rear end? You cannot simply start mixing gears. I suggest you get Mac Van Pelts V8 transmission rebuild book and study these transmissions first. Knowledge is power as they say.