transmission fit 47 gmc - The 1947 - Present Chevrolet & GMC Truck Message Board Network

c10 custom · 12-01-2013, 12:16 AM

Hi guys i have a 1947 gmc second series shortbox truck and i was wondering what 4 speed transmission will bolt up to the 216 engine like can i get a 4 speed transmission from a 1962 chev truck and install in my 47 thanks for your help guys

mr48chev · 12-01-2013, 02:09 PM

If it is an original GMC that no one has swapped engines in it should have a 228, 248 or 270 in it rather than a 216.

At any case outside of converting to an open drive rear axle (55,56 and 57 fit easily but don't have great highway gears) the only thing I can think of that might cause an issue is the bolt pattern where the trans bolts to the bellhousing. you may have to change to an early 50's bellhousing to get the bolt pattern that matches the later truck transmissions. Somewhere in the late 40's early 50's the smaller Chevy trucks still used the smaller "older" bolt pattern and changed to the more spread out bolt pattern.

As far as transmissions I'd look for a late 60's/70's full syncro four speed. They shift a lot smoother than the older ones.

tttuba · 12-06-2013, 01:03 AM

Is the old trans any good yet? I might be interested if you still have it.

c10 custom · 12-06-2013, 11:48 AM

the truck is canadian and canadian versions didnt have full pressure lubrication until 53
and gmc trucks came with chevrolet engines the transmission had some teeth chipped if i remember right

12-01-2013, 12:16 AM	#1
c10 custom Registered User Join Date: Aug 2011 Location: Lethbridge Montana Posts: 259	transmission fit 47 gmc Hi guys i have a 1947 gmc second series shortbox truck and i was wondering what 4 speed transmission will bolt up to the 216 engine like can i get a 4 speed transmission from a 1962 chev truck and install in my 47 thanks for your help guys

12-01-2013, 02:09 PM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,411	Re: transmission fit 47 gmc If it is an original GMC that no one has swapped engines in it should have a 228, 248 or 270 in it rather than a 216. At any case outside of converting to an open drive rear axle (55,56 and 57 fit easily but don't have great highway gears) the only thing I can think of that might cause an issue is the bolt pattern where the trans bolts to the bellhousing. you may have to change to an early 50's bellhousing to get the bolt pattern that matches the later truck transmissions. Somewhere in the late 40's early 50's the smaller Chevy trucks still used the smaller "older" bolt pattern and changed to the more spread out bolt pattern. As far as transmissions I'd look for a late 60's/70's full syncro four speed. They shift a lot smoother than the older ones. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

12-06-2013, 01:03 AM	#3
tttuba Registered User Join Date: Oct 2010 Location: Olympia WA Posts: 174	Re: transmission fit 47 gmc Is the old trans any good yet? I might be interested if you still have it.

12-06-2013, 11:48 AM	#4
c10 custom Registered User Join Date: Aug 2011 Location: Lethbridge Montana Posts: 259	Re: transmission fit 47 gmc the truck is canadian and canadian versions didnt have full pressure lubrication until 53 and gmc trucks came with chevrolet engines the transmission had some teeth chipped if i remember right



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