Automatic Transmission
Contents
727
The most legendary Torqueflite model is the A-727, which replaced the A-488 in 1962.
Assigned to the most muscular engines, heavy duty applications, and trucks, the A-727 used an aluminum case (rather than the A-488's cast iron case), saving about 60 pounds; in some models, it used a pawl (lock) for parking, actuated by a lever (1962-64 models) or by putting the transmission into Park.
The first generation of iron TorqueFlites had a rear pump as well as a front pump, allowing the automatic-equipped cars to be push started. It probably wasn't officially endorsed, but it worked in emergencies, and many people knew about it. For 1966, the rear pump was eliminated because the push-starting capability was rarely used.
AMC used Torqueflite automatics, both the 727 and 904, in altered cases to match their individual vehicles (where they were called Torque-Command). Case size, length, driveshaft yoke, and other external parts differ based on their applications.
904
A-904
the A-904 is a member of the Torqueflite transmission family. The A-904 was a scaled-down, aluminum-cased version; smaller and lighter, it was quite capable of dealing with the power of the Slant Six and 273 V8 (later, the 318). The difference between the 904, 998/999, and 727 was largely in the materials and the amount of 'beef' because of this Base models tended to get the A-904. the 904 and 727 tend to get confused, Much of this confusion probably stems from Chrysler's early general-public references to the 904 as "Torqueflite 6" and whichever Torqueflite was behind V8s at the time as "Torqueflite 8." A V8 version of the 904 did not appear until 1964, when it came out behind the 273. (And there was a slant-six version of the 727 for truck use.).
AMC used Torqueflite automatics, both the 727 and 904, in altered cases to match their individual vehicles (where they were called Torque-Command). Case size, length, driveshaft yoke, and other external parts differ based on their applications.
References
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