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Chrysler, Dodge, Plymouth, Jeep, and DeSoto Transmissions

545RFE

Automatic transmissions in roughly chronological order

Early Chrysler transmissions

 

Four-speed automatics

 

Transmission names show the number of gears, torque rating, transverse or longitudinal, and whether it has electronic control, so 41TE is a 4-speed, low-torque-capability, transverse-engine type transmission, while 62TE would be a six forward gears, higher capacity transmission for transverse mounted engines. (The RE/RFE transmissions are longitudinal, for rear wheel drive).

Starting with the 845RE, the system changed: the first number represents the number of forward gears (8), while the next two numbers are the torque capacity in (Nm/10); in this case, 450 Nm.

Five speed automatics:

  • 545RFE: 5 speed automatic, plus a second kickdown gear.
  • WA580: Mercedes-designed, Chrysler-produced (NAG1)

Six speed automatics:

Eight and nine speed automatics:

8-speed automatic (8xxRFE, 8HPxx, TorqueFlite 8) • 9-speed automatic (928TE, 948TE, 9HPxx)

Dual-clutch automatics / automatically shifted manual transmissions

Other automatic transmissions

Manual transmissions

  • getrag transaxleA-833 four-speed: from economy cars to the drag strip
  • Front-drive transmissions: 1980s, 1990s, including A-520, A-525, A-555, A-568, and others
  • Neon/PT Cruiser (T350 / T350HD)
  • T355 (Compass, Patriot, Caliber)
  • 2.2 TBI and 2.2 Turbo III transmission specs
  • Early Imperials page has a description of the 1930s four-speed manual.
  • Alan Ditmore noted others:
    • A-230, A-250, and A-390 three-speeds
    • Aisin-built AX-15 five speed (also used by Toyota) and AX-series four-speed on Jeeps
    • Later trucks used the NV2500, 3500, and 4500 granny gear five speeds, and NV-5600 six speed
    • NP-435 (New Process) “granny gear” four speed (MoparNorm wrote: “There were three versions of the NP435, a D-1, D-2 and D-3, with both wide and close ratio gear sets. The more modern version of the 435 (after the 445) was known as the NP4530, nearly identical, with different gear sets and more aluminum in the case.”)

tremec manual transmission

Performance, repair, and racing issues

Repairs and quick fixes

Transmissions: Racing and performance issues

General Motors transmissions in Mopar makes

Randle Blankenship wrote: There was a time in the early to mid 1950s when GM Hydramatics were used not only in GM cars, buses, trucks, and military vehicles, but Nash, Hudson, Kaiser, Willys cars... and some Dodge postal delivery trucks (1954 or 1955 RHD models). The sound of their coming and going was distinctive.

The Dodges had the shift lever sprouting from the left side of the steering column. The shift quadrant was marked R Lo Dr N. I saw one of these up close at the time, and I can confirm that it was indeed a four speed truck Hydramatic coupled to a Dodge Six engine. The same vintage International postal trucks were using 3 speed Borg Warner automatics. I do not know of any consumer type Dodge truck of the time being offered with any kind of automatic, though some earlier Dodge pickups had optional fluid drive.

Hybrid-electric transmissions

General Motors, DaimlerChrysler, and BMW developed a two-mode transmission/motor, which increased the gas mileage of the Dodge Durango/Chrysler Aspen Hemi by around 25%; it was also used in Chevrolet and Cadillac trucks and Mercedes and BMW cars. Starting in 2007, GM built all the transmissions for all the partners in a new plant near Baltimore. It had two electric motors inside; one for low speeds, the other for high speeds. The automatic-transmission part (which is used for transmitting gas-engine power) was a CVT. This setup was dropped by General Motors pickups when the 2014 models were launched, and by Chrysler when the Durango and Aspen were cancelled.

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Mopar (Chrysler, Plymouth, Dodge, etc) transmissions.