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1958 savoy Transmission
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Blast
Posted 2025-06-18 8:02 AM (#640467)
Subject: 1958 savoy Transmission


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Can any Plymouth or Dodge engine be used with the push button drive?
Was the transmission specific for using the push button drive?

Thanks, Blast.
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Powerflite
Posted 2025-06-18 11:35 AM (#640475 - in reply to #640467)
Subject: Re: 1958 savoy Transmission



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Location: So. Cal		I assume you are talking about the A466 cast iron transmission. With a proper bellhousing and adapter, you can make it work on anything. However, not many adapters are made for these transmissions. So currently these transmissions are compatible with only:

'52-'61 All hemi or poly engines except '51-'53 Chrysler hemi
'58-'61 big block engines
Straight six engines from the '30's to '59.

You can also use them on '62-up big blocks if you use the older crankshaft in the newer engines. The '62-'64 A727 transmissions are also push-button drive and these are compatible with the later engines. '65 is similar, but used a different cable shifter.

Edited by Powerflite 2025-06-18 2:54 PM
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Blast
Posted 2025-06-18 11:54 AM (#640477 - in reply to #640467)
Subject: Re: 1958 savoy Transmission


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Thank you Powerflite
What item was used to connect the push button cables to shift the Transmission.
What is it called? It had to attach to the transmission some how to have it shift correctly.
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Powerflite
Posted 2025-06-18 2:57 PM (#640479 - in reply to #640467)
Subject: Re: 1958 savoy Transmission



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Location: So. Cal		They are all shifted by a cable. This required a specific valve body inside the transmission. You can shift a newer transmission with a cable by reducing the spring tension in the detent spring. But you won't be able to access Park with the push buttons.
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Lancer Mike
Posted 2025-06-18 10:45 PM (#640486 - in reply to #640479)
Subject: Re: 1958 savoy Transmission



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Location: The Centennial State

What about the small blocks?  318s and 325s came with pushbutton transmissions too.  

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Powerflite
Posted 2025-06-19 1:10 AM (#640487 - in reply to #640467)
Subject: Re: 1958 savoy Transmission



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Location: So. Cal		Those fall under poly.
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56D500boy
Posted 2025-06-19 2:56 AM (#640488 - in reply to #640477)
Subject: Re: 1958 savoy Transmission



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Blast - 2025-06-18 8:54 AM
What item was used to connect the push button cables to shift the Transmission.
What is it called? It had to attach to the transmission some how to have it shift correctly.


A 1958 Plymouth Savoy could have been ordered with a 3 spd manual transmission, a 2 spd Automatic (called a "Powerflite") or
a 3 spd Automatic (called a TorqueFlite).

Both of the automatics were controlled by a push button mechanism that moved a cable that was attached to the transmission
that moved a lever arm that moved a mechanism inside the transmission that controlled the shift pattern.

For the two spd auto (Powerflite) there was a shifter box with 4 buttons, N, R, D and L. For the Torqueflite the shifter box had 5 buttons: N, R, D, 2, and 1.

In both cases the N and R are obvious (Neutral and Reverse). The Powerflite D position let the transmission start moving forward in first gear and then
as speed increased the transmission would shift to "high". For the TorqueFlite, the D position started the transmission in the lowest gear and then as
speed increased there were shifts to 2nd and finally to "high".

For the Powerflite, punching L put the transmission in the lowest gear where it stayed until a very high speed when the transmission would shift to high out
of self preservation (safety). The Torqueflite "2" started out in 1st and with increasing speed there would be a shift to "2" where it would stay until a very high speed
would result in a safety shift to "3".

The shifter boxes looked like these:

Powerflite:





Torqueflite:







Edited by 56D500boy 2025-06-19 10:00 AM
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58coupe
Posted 2025-06-19 10:57 AM (#640489 - in reply to #640467)
Subject: Re: 1958 savoy Transmission



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Location: Alaska		There are also some internal differences that don't affect interchange. The Chrysler 300s and Desoto Adventurers, the high performance Dodges and Plymouths were built a little more heavy duty internally.
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