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1955 Desoto
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   Forward Look Technical Discussions -> Transmission and Rear AxleMessage format
 
desotodude
Posted 2021-12-25 10:35 PM (#617912)
Subject: 1955 Desoto


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Posts: 1

I have a 55 Desoto Firedome powerflite that I am placing in a 40 Desoto. I want to keep the dash shifter linkage in tack. The 291 is being beefed up a little bit and the transmission is being rebuilt also. Are there kits that would help build it up for the extra horse power that will be coming from the 291? Or should I switch to to a later powerglide? The big thing I want is to keep the dash shifter and linkage from the 55. Using the whole drive train from the 55 for the 40. Body is to far gone to save so I'm putting it to use elsewhere.
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58coupe
Posted 2021-12-26 11:46 AM (#617916 - in reply to #617912)
Subject: Re: 1955 Desoto



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Do you plan on using the original 6 volt system or convert it to 12 volt? The Powerflight should handle the power if rebuilt as long as you don't get extreme with the HP.
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56D500boy
Posted 2021-12-26 1:37 PM (#617922 - in reply to #617912)
Subject: RE: 1955 Desoto



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I am not the expert you need but I know a little bit.

Let me say this: The factory 1955 Chrysler 300 with two 4bbls on a 331 cu engine that made 300 hp used mostly Powerflite 2 speed automatic transmissions.

REFERENCE: http://oldcarbrochures.org/United%20States/Chrysler_and_Imperial/19...

So, in general, a Powerflite would probably be okay on your warmed over 291 Desoto. That said, the 1955 300's Powerflite was beefier than most Powerflites (more clutch discs, etc) and probably used a water cooled torque converter as shown in these images (one is from a Desoto to it might be similar to your set up - if it is, that is a good indication that your Powerflite might already be up to the task) (Scroll down to see the images):

See if you can see the number that is stamped on a machined spot near the filler tube on the right side of the transmission and then report back (this - from bbdakota):





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