Gil Baumgartner
CTCI Authenticity Chairman
Subject: Fordomatic Transmission Identification TRANSDATA(2)
The identification of Fordomatic transmission can be rather confusing. Their are fifty eight configurations of the fordomatic transmission built between 1951 and 1959 that could be adapted for use in the 1955 thru 1957 thunderbirds. In most cases modifications are required, the shifter lever (P/N 7A256) must be changed and in some cases the kick down lever must also be replaced. The output shaft housing should be 16 3/4" long and the speedometer gear hole angled down. The speedometer gear must angle down unless you want the speedometer to indicate backwards. However their are ways to correct that problem.

The identification tag just aft of the shifter lever reveals the application for the transmission. If the tag is missing these letters are some time cast into the transmission case.The following identifications letters apply to the thunderbirds:

  • 1955 - PMB -C
  • 1956 - PAW - C, air cooled
  • 1956 - PAW - F, water cooled
  • 1957 - PBA - C, 4V
  • 1957 - PBA - E, S/C and 8V

The first cruise-o- matic (C/M) 3 three speed dual range transmissions were built in 1958. During 1958/59 their were twelve different applications of the C/M transmission. Most if not all can be adapted to the 55 -57 thunderbirds. The shifter lever must be correct, the output shaft housing must be the correct length and the bolt pattern to the bell housing must be as follows. Top holes 8" from center to center, bottom holes 11" center to center and bottom to top 5 5/8" center to center.

In 1960, 61, 62 the C/M transmission was not available. The followingtransmissions were available FM, FM 2, FX light duty, MX heavy duty. Most of which could be adapted to the 1955-57 thundebirds.

In 1963 the C/M reappeared in the 1963 thunderbirds it had a vacuum modulator to promote a smoother shift. 1963 was the last year the C/M transmissions were used. The following is a list a list of C/M transmissions I.D. number by year:

  • 1958 - PBM - D, PBL - E & F, PBB - M, PBL - U & V
  • 1959 - PAZ - L & T, PBM -J & N, PBL - U & V, PBB - M,
  • 1963 - PCE - L & Y, 3904V, PCE -R & AC, 390 6V

The following C/M transmissions can be found in trucks:

  • 1959 - PBC - F& H, PAU - G, H, J & K these were coupled to 6 cyl engines. PBW - C & E, PPY - C, E, D & F were used with 292 engines.
  • 1960 - PBC - K, PAU - J & K were used with 6 cyl engines. PBW - G, PBY - E & F were used with 292 engines.
  • 1961 - PBC - M, PAU - L & M, 6 cyl, PBW - K, PBY - G & H 292 engines.
  • 1962 - PBC - M & R, PAU - L & M, 6 CYL. PBW - K & L, PBY - G & H. 292 engines.
  • 1963 - PBC - R & M, PAU - L & M, 6 Cyl engines. PBW - L & K, PBY - G & H. 292 engines.

Some of the C/M transmissions are easy to convert by changing the shifter lever, look for the correct bell housing bolt pattern and output shaft length. In addition to the C/M transmissions their are several other automatic transmission that can be adapted including the FMX and C4.

Gil

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