My 47 Roadmaster has a standard 3 speed, the motors manual states this tranny was used in 46-48 in 60 70 80 90 series and 53-55 series 50 60 and 1956 series 40. my question is concerning parts availability and interchangability. does any one have one of these out a car so that i can get the case and tail shaft numbers?

note these standard transmissions are not the same as the model 40 and 50 does any one know if the internals are interchangable between the aplications, are they diferent animals all together?

were these transmissions in whole or part used in other makes or model cars. did pontiac or olds or chevy use the same parts or even entire trannys?

what is the availability of parts any recomended supliers?
any quirks i should know about like leaking from the torque tube will it drain the trans?

it was runing great then it started hard shifting from 1st to reverse inspecting i saw fluid leak on the floor. 2nd to 3rd is great ill recheck fluid level. aparently diging into these can be quite an undertaking requiring an engine pull and or rear end removal additional coments or tips apreciated.

prob is not a detent ball or spring a mashed gear was sugested i suspect needle bearings causing a prob.

there is not alot of info on these on the web most parts supliers can get all sorts of parts for the dynaflow but these dont get much mention and to convert would beget massive probs.

To my knowledge no parts interchange between the large series trans and the small series trans.
STOP DRIVING THE CAR NOW!!!!!!!!
Parts are hard to find and the more you drive the more you break. Do check the shift lever bushings as these have a habit of disintegrating and then you can't shift the trans easiy. If these bushings are missing the gears don't fully engage and the syncro rings wear out rapidly. (VERY hard to parts)
It is easier to pull the diff to remove the trans (1 to 1 1/2 hours) than it is to pull the engine. Don't forget that the bolts that hold the rear springs to the diff are LEFT-HAND thread.

Bill

Thanks for the tips tis good info!
time to track down a few of these trannys and do my research into the interchange manuals. the buick power train is an interesting beast for certain.

100% rust free and all there she deserves nothing but the best and original. the 8 runs like a clock and you can park bone china on it with out risk.

I took my '41 Century's transmission apart, and it is a very simple thing to work on. Parts like bearings, seals and gaskets are still available, but synchros are all but non-existent. You'll have to find NOS items if you need them. Cluster gears show up on eBay once in a while, but they're expensive (~$250 was the last one I saw). The gears are pretty durable and unless it's been abused, I wouldn't think you would need new ones. But you never know until you have a look inside.

Yeah, removal is a real pain, but if the choice is removing it before it breaks or removing it after it breaks, well, that's an easy choice to make.

Here's what mine looked like:

http://www.harwoodperformance.bizland.com/1941buick/092703.htm (the next 2 restoration days also deal with reassembly).

Hope this helps!

good deal that works well for me the break down on thouse photos and the warning to not tear the gasket is great.

Ive done these syncromesh trannys before every manufacturer can be a new surprise ,the one key point being use grease to hold your roller / needle bearings lol my 1st time i did one i was pulling my hair out over that delema.

fortunate for myself i saw a deal on tranny gaskets a year or so back and picked them up. once the case gets cracked on this trans no stone will be left unturned i want it to be quite awhile till i need to go back in there.

im interested in getting some answers as to the ins and outs on these. Its quite common for the interchange to be quite extensive. I see folks yanking the drive trains out of these old cars and then they call it a resto but they will never know the meaning of the term "drives like a cloud" unless they experience the true thing.

ill promise you if i read mustang 2 front end and small block chev in the descript you lost my business im looking for the real macoy.

Thanks again guys.