Ford Automatic Transmission Identification

Written by rob wagner
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Ford Automatic Transmission Identification
Ford automatic transmissions can be identified by the driver's side door jamb label or a metal tag on the gearbox. (Image by Flickr.com, courtesy of cloudzilla)

Ford's safety compliance certification label on the driver's side door jab will identify the automatic transmission with a single letter. A metal identification tag can be found on other Ford automatic transmissions.

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Decoding the Letter

The letter "V," for example, identifies the transmission as a C3 in the 1983 Ford Ranger trucks equipped with a 3-speed automatic with gear ratios of 2.47, 1.47 and 1.00 (see Reference 2).

Engine Size

The letter also identifies the engine size of a Ford, such as "D" identifying the 5R55E automatic in 1997 to 2009 Fords equipped with 4L engines (see Reference 2).

Identification Tag

On C-4, C-5 and C-6 transmissions below the servo cover bolt is a metal identification tag embossed with model prefix and suffix numbers, five-letter transmission model number and build date, according to allfordmustangs.com (see Reference 3).

C-4 vs. C-5

The C-4 and C-5 have physical differences. The C-5 features a different hydraulic system with more valves and a converter relief vale switched from the pump to the assembly reactor support, according to the rangerstation.com (see Reference 2).

Casting Letter

The letter "P" in a casting number on the transmission denotes an automatic, while an "R" identifies a manual transmission (see Reference 1).

Caveat

Identical "P" and "R" letters are found stamped on other Ford parts, making the safety compliance certificate a better method of identification, according to mmerlinn.tripod.com (see Reference 1).

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