Vintage Oldsmobiles Curved Dash, Limited Touring, Models 40, 53, 66; Series 60, 70, 90

'47 66 Standard Transmission Parts

Old July 23rd, 2018, 10:49 AM
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'47 66 Standard Transmission Parts

Hello,


a friend of mine has obtained an unrestored '47 Oldsmobile 66.


The car has the standard transmission. It works but but it is very tired. We have a few questions concerning the transmission:


) It is called a "Synchro-Mesh". Is there a technical term for it? Like "Muncie SM420" for example?


) Is there a source for parts? The usual (automatic) transmission places (Fatsco, NWT) list nothing...


) Which cars do share this transmission? Other A-bodies like Chevrolet, Buick Special? And which years?



Thanks in advance!



'47 Oldsmobile 66
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Old July 23rd, 2018, 07:08 PM
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First off your 47 isn't even a first generation Oldsmobile it, pre first generation. Nothing on A body will cross over to it and not much from 49 and on will ether but I'm sure the transmission has a name and number unfortunately my books only go back to 49, maybe Ozzy can enlighten us on the style and number.

Synchro-Mesh is a type of transmission that can be shifted up or down with out the grinding of gears, kinda new in the forties and appealed to the ladies and everyone else that were just starting to drive. Oldsmobile was catering to that market and did well there.

In 49 and later some Cadillac"s LaSalle had the same bolt pattern bell housing as Oldsmobile and maybe earlier but as I said I don't have books to back anything up.

Your transmission probably can be rebuilt they are pretty basic in design and robust to boot. If it runs but is just noisy it most likely can be refreshed and made close to new. Bearings and seals are mostly universal and ageless. I would look for a business that caters to trucks and tractor transmission repair not automatic specialist.

Your first investment should be a factory Oldsmobile motor manual that would answer most of your inquires on names and models and a Hollander of that era would give you parts exchange from one make to the other. They are out there on Ebay from time to time if you keep a eye out. Hope that helps some, others sure can add to this as I a bit ignorant on the earlier stuff..... Lost in the fifties ...Tedd
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Old July 23rd, 2018, 09:18 PM
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Tedd, thanks for your answer.


By A-body I mean the then contemporay A-bodies, 40s Chevrolets,some Pontiacs and the like.



The transmission can be rebuilt. The struggle is for information on interchangeability and parts sources.



The car is located in Germany, so we would prefer a complete overhaul kit because it it would be very difficult and lengthy to purchase single parts from various sources.



A shop manual is present but it contains no transmission data that would lead to anything googling for it.


Unfortunately a Hollander of that era is not at hand.



US body plate

The car is built in Europe as a CKD-kit but parts are 100% Lansing.
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Old July 23rd, 2018, 11:19 PM
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All '47 Oldsmobiles used a General Motors "B" manual trans . It was built by Buick .
This basic transmission was used in Buick Special and Super models from 1934 thru 1955 .
It was also used by Oldsmobile from 1934 thru 1948 and in 1949 & 1950 six cylinder cars .
In addition , it was used by Pontiac from 1935 thru 1955 .
The Buick trans was a "torque tube type " while the Pontiac and Olds versions had an "open" driveshaft with exposed u-joints .
1934 thru 38 versions were top shifted . While 1939 and up were column shift with a "selector " type linkage .
1934 thru 40 transmissions had bronze bushings on the countershaft . '41 and up had roller bearings . For this reason only complete sets of gears should be interchanged between the two .
Complete transmissions from 39 thru 48 Olds as well as 39 thru 55 Pontiac should swap in to your '47 without much trouble .

No Chevy transmissions will work .
For transmission parts try this company ;http://www.nwtparts.com/

Hope this helps .

Last edited by Charlie Jones; July 23rd, 2018 at 11:39 PM.
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Old July 23rd, 2018, 11:27 PM
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This is great information, thank you!



Is there a good vendor who provides parts for it?



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Old July 24th, 2018, 11:35 AM
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Originally Posted by 6262 View Post



Is there a good vendor who provides parts for it?

This one ; http://www.nwtparts.com/
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Old July 24th, 2018, 02:09 PM
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Thanks. I have contacted them and will report back.
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Old August 3rd, 2018, 08:58 AM
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Just in case anyone else has this problem again: NTP has indeed a vast assortment of parts for the B-O-P-Syncro-Mesh-3-spd-manual-transmission. Although it is not listed on their website. Thanks again for the hints! 
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