Transmission Identification
 

There were three different types of transmissions used in the Power-Wagon over its production run from 1946-1968.

 
"Up to" Type Non-Synchromesh
Years Used: 1946-1951
Dodge Part Number: 921 869, casting number C-38126
Marty MacKenzie Photo
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Todd Somers Photo
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The "Up To" type has the drain plug in the center section of the transmission case going in at an approximately 30 degree angle to the bottom of the case.
 
"After" Type Non-Synchromesh
Years Used: 1951-1956
Dodge Part Number:1265 422, casting number C-38711
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Difference between the "Up To" and "After" type transmissions is in the placement of the drain plug. The "After" type has the drain plug in the rear of the transmission case going in parallel to the bottom of the case.
 
New Process 420 synchromesh
Years Used: 1956-1968
Dodge Part Number: 1666 547, NP420
Todd Somers Photo
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Todd Somers Photo
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Visually the difference between the non-synchromesh and later NP420 synchromesh transmission, when looking at the transmission tower inside the cab, is that the NP420 tower is located further forward towards the firewall where the non-synchromesh tower is located more towards the center of the transmission hump.
 

I hope to update this page from time to time as more info becomes available, and feedback is given about other information that would be good to include on this page.

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