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WTB: 1938 Buick coupe convertible special 40 Rear Differential


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Welcome to the AACA Discussion Forum. The most likely source for the differential you are seeking is Dave Tacheny. You can best reach him by calling him at 763-427-3460 between 4 and 7 pm Central. You should also check out the 36-38 Buick Club. As an owner of a 1938 Buick membership would be helpful to you. You can find out about the club at: http://www.3638buickclub.org/ If you contact me through a private message here, or through the contact the webmaster link on the 36-38 Buick Club website, I will be happy to send you a .pdf copy of a recent club newsletter.  

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19 hours ago, Pete Phillips said:

Friend of mine has one for sale near Dallas, Texas, out of a 1940 Special, so I believe they would be the same. Would help if you tell where you are located, as shipping will be expensive.

Pete Phillips, BCA #7338

I am located in Massachusetts could you email your friends contact info please? 

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On 2/10/2021 at 9:06 AM, EdgarCalaveras said:

Looking to buy the ORIGINAL rear differential for a 1938 Buick coupe convertible special 40. If you have one please email me at bostontattoo@aol.com so we can do business.

If you can get a diff from a series 60 Century will have a higher/faster ratio


From reading the old Torque Tube mag's 1940 is not a drop in/bolt up to 1938 (or 1939). 

The old magazines have articles on machining, cutting & welding later diff's-drive shaft/torque tube to fit, so to get a higher ratio.

1940 and later have a flanged joint of diff to torque tube. 1939 and older are riveted.  Flanged is better



Not the same topic but has info on later diff's



Edited by 1939_Buick (see edit history)
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