jajolee Posted April 10, 2016 Share Posted April 10, 2016 can someone please help me identify this dynaflow I can not find for what year it was used thanks jan Link to comment Share on other sites More sharing options...
Joseph P. Indusi Posted April 10, 2016 Share Posted April 10, 2016 Just a guess until I check my books, but looks like it came from a 1953 Oldsmobile or Cadillac. I see the rear output shaft does not look like there was ever a torque ball as Buick used with the torque tube closed driveshaft system. Also the bell housing looks like it has "ears" that I have seen on Olds/Cadillac Dynaflows. Dynaflows were used in Oldsmobiles and Cadillacs only in 1953 because the Hydramatic plant burned to the ground and so GM fitted Dynaflows to these cars that would normally have had Hydramatics Joe, BCA 33493 6 Link to comment Share on other sites More sharing options...
jajolee Posted April 11, 2016 Author Share Posted April 11, 2016 here are some more pictures I am looking all over the interweb but cannot find it. thanks jan Link to comment Share on other sites More sharing options...
RivNut Posted April 11, 2016 Share Posted April 11, 2016 Here's a picture that is from an old eBay listing for a Cadillac Dynaflow. Looks like what you have. http://www.ebay.com/itm/53-CADILLAC-DYNAFLOW-AUTOMATIC-AUTO-TRANS-TRANNY-TRANSMISSION-/131428134495?nma=true&si=jGJkWxpDNZFigAZHiiu9BumNu48%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557 1 Link to comment Share on other sites More sharing options...
jajolee Posted April 11, 2016 Author Share Posted April 11, 2016 thanks they almost look the same only the ears on the bellhousing arn't there I know for sure that it isn't buick I find it strange that the converter is bigger than the bellhousing. thanks jan Link to comment Share on other sites More sharing options...
old-tank Posted April 11, 2016 Share Posted April 11, 2016 22 minutes ago, jajolee said: thanks they almost look the same only the ears on the bellhousing arn't there I know for sure that it isn't buick I find it strange that the converter is bigger than the bellhousing. thanks jan It is not Buick or Cadillac, so it must be Oldsmobile. There was probably an adapter between the bellhousing and the engine. 1 Link to comment Share on other sites More sharing options...
jajolee Posted April 11, 2016 Author Share Posted April 11, 2016 does it help when I say that I found it in a Belgium junkyard full us and canadian cars. Link to comment Share on other sites More sharing options...
jajolee Posted April 11, 2016 Author Share Posted April 11, 2016 (edited) I have placed the question on the oldsmobile forum. Edited April 11, 2016 by jajolee (see edit history) Link to comment Share on other sites More sharing options...
Gene Brink Posted April 11, 2016 Share Posted April 11, 2016 Picture of '53 Oldsmobile block. Converter nestles inside of block extension to attach to crankshaft so bellhousing is not full like Buick. Link to comment Share on other sites More sharing options...
jajolee Posted April 11, 2016 Author Share Posted April 11, 2016 (edited) thanks you put the engine over the converter instead of against it so the dynaflow is for a olds engine but I dont see the ears on the bell housing jan Edited April 11, 2016 by jajolee (see edit history) Link to comment Share on other sites More sharing options...
Joseph P. Indusi Posted April 12, 2016 Share Posted April 12, 2016 Based on the photos of the bell housing this is definitley from an Oldsmobile. The Cadillac and Olds bell housings were about 1/2 the depth of the Buick bell housing on these Dynaflows. The torque converter and the clutch pack and other internals were the same for Buick and Olds. Parts on Cadillac torque converter will not fit others and only some internal parts will fit. All three oil pans are different. Heater hose routings on Cadillac and Olds had to be modified to provide cooling for the Dynaflow heat exchanger; Hydramatic did not need cooling. Joe, BCA 33493 1 Link to comment Share on other sites More sharing options...
Ben Bruce aka First Born Posted April 12, 2016 Share Posted April 12, 2016 I think it is amazing GM/Dynaflow were able, in so short a time, make the changes necessary to make this work. Off topic, but did all Olds engines have the extended back, or just auto trans ones? Ben Link to comment Share on other sites More sharing options...
RivNut Posted April 12, 2016 Share Posted April 12, 2016 I just had a wild a$$ed thought. If that transmission was found in Belgium, who's to say that it's not a transmission from an M18 Hellcat Tank Destroyer. Buick division built the M18. I don't like quoting Wikipedia but "..... It (dynaflow) received some severe early testing in the M18 Hellcat tank destroyer, which were built in Buick's Flint, Michigan assembly plant during World War II." What better place to find World War II items than it the countries in which the war was fought. The ears on the side would allow for quick removal of the entire drivetrain for maintenance. Just a thought. Anyone else? Link to comment Share on other sites More sharing options...
NC-car-guy Posted April 12, 2016 Share Posted April 12, 2016 4 minutes ago, RivNut said: I just had a wild a$$ed thought. If that transmission was found in Belgium, who's to say that it's not a transmission from an M18 Hellcat Tank Destroyer. Buick division built the M18. I don't like quoting Wikipedia but "..... It (dynaflow) received some severe early testing in the M18 Hellcat tank destroyer, which were built in Buick's Flint, Michigan assembly plant during World War II." What better place to find World War II items than it the countries in which the war was fought. The ears on the side would allow for quick removal of the entire drivetrain for maintenance. Just a thought. Anyone else? Now that would be cool Link to comment Share on other sites More sharing options...
RivNut Posted April 12, 2016 Share Posted April 12, 2016 (edited) Can anyone decode the date stamp that's was screwed into the mold before the trans was cast? I found this reference on Buick.net NOTE: Following markings are stamped on aluminum plate low on the transmission, on left side and between the main transmission case and the front pump housing. IDENTITY LETTER USAGE H '53 40 ser. J '53 50, 70 ser. K or M '54 40,60 ser. P '56 All R '57 All S '58 All T '55 50, 70 ser. W '59 All Edited April 12, 2016 by RivNut (see edit history) Link to comment Share on other sites More sharing options...
jajolee Posted April 12, 2016 Author Share Posted April 12, 2016 thank for the replies I don't think the trans came out a M18 because the M18 has a radiaal engine and a different gear box it sure would be nice there is no number on the aluminium casing I think it is olds I have a oolds engine in my barn and the bolt pattern looks the same Link to comment Share on other sites More sharing options...
jajolee Posted April 12, 2016 Author Share Posted April 12, 2016 this is the undersite I believe this is a olds transmission mount under the tail the only thing that bothers me are the ears Link to comment Share on other sites More sharing options...
Joseph P. Indusi Posted April 13, 2016 Share Posted April 13, 2016 The 1953 Buick Technical Service Bulletin shows the Dynaflow in both Cadillac and Olds installations. The illustration of the Olds bell housing shows the ears. Perhaps an Olds expert might know what the ears were used for, perhaps for some kind of frame mount. Joe, BCA 33493 Link to comment Share on other sites More sharing options...
jajolee Posted April 13, 2016 Author Share Posted April 13, 2016 JPIndusi can you please post a picture from the illustration thanks jan Link to comment Share on other sites More sharing options...
RivNut Posted April 13, 2016 Share Posted April 13, 2016 I found a reference to a 1953 Buick using the casting number on the transmission body. Perhaps the casting number on the bell housing might be a clue as to the application for this particular unit. The bellhousing part of the dynaflow could be separated from the actual transmission body. Perhaps when the fire occured at the Hydra-matic plant all GM would have had to do to mount the dynaflow in a Cad, Olds, or Pontiac would be to cast a different bellhousing and they'd be back into production. ????? Ed Link to comment Share on other sites More sharing options...
jajolee Posted April 13, 2016 Author Share Posted April 13, 2016 (edited) they also have to cast another tail section because the transmission mount is different from a buick only the centerpart is the same jan Edited April 14, 2016 by jajolee (see edit history) Link to comment Share on other sites More sharing options...
Brett7777777 Posted May 18, 2021 Share Posted May 18, 2021 Hi I have a 1953 Buick dyna flow and it went in gear and moved about 50 feet and then in reverse back where it started from .now it will not move at all forward or back any ideas that transmission looks just like mine is it for sale Link to comment Share on other sites More sharing options...
g-g-g0 Posted May 20, 2021 Share Posted May 20, 2021 On 5/18/2021 at 2:07 PM, Brett7777777 said: Hi I have a 1953 Buick dyna flow and it went in gear and moved about 50 feet and then in reverse back where it started from .now it will not move at all forward or back any ideas that transmission looks just like mine is it for sale Brett PM sent. Link to comment Share on other sites More sharing options...
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