Letter Car Transmission Identification

By George Riehl

Reprinted from the 1982 issue of the Club News Volume VIII Number IV

During the past year, many members have questioned the originality of the transmissions in their 300 Letter Cars.

Sorry to say, only about 20% of these transmissions that are presently in their 300s are correct. Through the years the transmission had been exchanged for a Plymouth, Dodge, Imperial and regular Chrysler core.

I cannot say this has been deliberate, but one must realize that in the early years, many shops or individuals were unaware that 300 transmissions were “special” even though the outward physical appearance was the same. Even the interchange books showed that one could be exchanged for the other.

If you wish to check to see if your Powerflite or Torqueflite is the correct one for your 300, the following list will help you. These numbers have been obtained from Chrysler parts books and some I have verified on my own 300s and found that some of mine are Imperials, New Yorkers, and Plymouths. But luckily, these are my spare units.

The transmission part number is located on the lower right side (passenger side) right above the pan on a machined off area. The transmission case number is located halfway up the main transmission case on the left side (driver’s side).


Part No.

Case No.

1955

Powerflite

1673170

1619333

1955

Powerflite (A)

1638475

1619333

1956

Powerflite

1676190

1638527

1956

Torqueflite

1854123

1736236

1957

Torqueflite

1854123

1736236

1958

Torqueflite

1854123

1736236

1959

Torqueflite

1854167

1941628

1960

Torqueflite

1949808

1941628

1961

Torqueflite

2204692

1941628

1962

Torqueflite

2205190

2400131

1963

Torqueflite

2464426

2400131

1964 (Ram)

Torqueflite

2464735

2400131

1964 (non-Ram)

Torqueflite

2464734

2400131

1965 (C)

Torqueflite

2466113

2400131

1965 (D)

Torqueflite

2466148

2400131

Note A: Also available in 1955 for racing purposes only. Requires valve body #1559328. Revised 11-15-55, Service Bulletin 936-CH.
Note B: Mid-production year changeover from Powerflite to Torqueflite.
Note C: Up to transmission number 1589110.
Note D: After transmission number 1589110.


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