Cruise-O-Matic

From Wikipedia, the free encyclopedia
  (Redirected from Ford-O-Matic)
Jump to: navigation, search
Ford "X" Transmission
Overview
Manufacturer Ford Motor Company
Also called

Ford-O-Matic

Cruise-O-Matic

Merc-O-Matic
Production 1958-1981
Body and chassis
Class 3-speed automatic transmission
Related C-4/C-5
C-6
C-3
Chronology
Successor AOD

Ford-O-Matic was the first automatic transmission widely used by Ford Motor Company.[1] It was designed by Borg Warner Corporation and introduced in 1951 model year cars. The three-speed Ford-O-Matic evolved into the "MX" and "FX" or Cruise-O-Matic transmissions in 1958 and the FMX[2] in 1968. This line continued in production until 1980, when the AOD was introduced. Like Ford, variations of this same Borg Warner design were used by other automobile manufacturers as well, such as AMC, International Harvester, Studebaker, Volvo and Jaguar, each of them having the necessary unique adaptations required for the individual applications.

Fordomatic[edit]

In 1948, Ford realized it was late in introducing a fully automatic transmission to its automobile lineup. Ford Engineering Vice President Harold Youngren, recently hired away from Borg-Warner, recommended that Ford license and build a transmission using a design he was working on at his previous employer. Ford and Borg-Warner signed a contract in 1948 which entered B-W into a supply agreement wherein they would build half of Ford's transmissions for five years, with the other half either being built by Ford or by a different supplier. Because of this agreement, Ford licensed the design themselves and broke ground immediately on an assembly plant to build the remaining transmissions. The new plant, called Fairfax Transmission Plant, was dedicated in 1950. The original Ford-O-Matic accomplished two things that Ford's two previous automatic transmissions failed to do. Through the use of an integrated torque converter and planetary gearset, Ford's automatic shifted smoothly without an interruption in torque from the engine. The other was the shifting pattern, revised from PNDLR to PRNDL, which served to reduce "shift shock" when changing gears and reduce "torque shock" when trying to rock a stuck car back and forth. The original Ford-O-Matic, while capable of three forward speeds, started out in second and shifted to third, with first only being used when selecting L on the gear shift column. However, if floored from a standing start, it would immediately shift from second to low then shift back to second and then third as the vehicle accelerated. The Ford-O-Matic was manufactured from 1951 until it was replaced by the C4 in 1964.[1]

MX/FX[edit]

In the mid-1950s, cars began to grow in size, and in response to heavier vehicles, more powerful engines were being developed. The original Ford-O-Matic was used as a template when developing the next automatic transmissions for Ford; in fact, many of the gear sets are interchangeable. The new transmissions arrived for model year 1958 which coincided with the release of Ford's new FE and MEL engines. Although marketed as Cruise-O-Matic, the new transmissions were known internally as the MX (larger) and the FX (smaller). They were a three-speed design using a Ravigneaux planetary gearset like the original, but moved the pump from the rear to the front of the transmission, while also using a different valve body so the transmission would start in first gear as opposed to second. The MX was built in the Livonia Transmission Plant in Livonia, Michigan and was placed behind the more powerful engines in Mercury, Lincoln, and select Ford models. The smaller FX was built alongside the Ford-O-Matic at the Fairfax Transmission Plant and was put in midrange Ford and Mercury models. Because the original Ford-O-Matic started in second rather than first, it was marketed as a two-speed after the new three-speed transmissions were introduced. Production continued until it was replaced by the C4 in 1964 and application was for smaller Ford and Mercury vehicles....

Fordomatic two-speed[edit]

The Fordomatic two-speed transmission was introduced in 1959. A simplified version of the Cruise-O-Matic, it combined a torque connector and a compound planetary gear set. A front unit (multiple-disc) clutch provided high gear, a front band on the clutch drum provided low gear, and a band on the rear unit internal gear drum provided reverse. This transmission was offered on Ford, Fairlane, Mercury, Edsel, Falcon, Comet and Meteor cars with differences in the torque converter, valve bodies and clutch plates to accommodate differing engine torques.

FMX[edit]

Ravigneaux planet carrier from a Ford FMX, with a dinner fork to show scale

In 1966, Ford introduced the C6 automatic, which left them with three heavy-duty automatic transmissions and crowded conditions at Livonia Transmission plant. Ford decided to combine the best attributes of the MX and FX transmissions and ended up with an improved version of the "X" called FMX. This transmission used the stronger MX-type rotating parts in the smaller FX style case. This cut down on both weight and the number of transmission components Ford needed to make. This transmission was manufactured at the Fairfax Transmission Plant, freeing up capacity at Livonia for the new C6. The FMX was manufactured from 1968 to 1979, when the Fairfax Transmission plant was closed.

Although the FMX was phased out in the United States in 1979 in favor of Ford's then-revolutionary Automatic OverDrive (AOD) transmission, the FMX was sold for another four years for use in V8 Ford Falcons built in Australia. The FMX ceased production when Ford Australia phased out the V8 engine in 1983.

Gear ratios[edit]

  • First: 2.40:1
  • Second: 1.47:1
  • Third: 1.00:1
  • Reverse: 2.00:1

XT-LOD[edit]

In 1962, Ford began working on a new type of automatic transmission to emphasize fuel economy and driveability. The new transmission was built around the Ravigneaux planetary of the "X" transmissions. Where many transmissions had a fourth gear added as an afterthought, Ford's new transmission was designed with a fourth gear already integrated into the gearset. Because it was based on the X transmissions, its gear ratios from 1-3 were the same, with the fourth being .67:1. The transmission featured a split-torque application for third gear, as well as a lockup in the torque converter. The project was shelved with a design that initially lacked a dampener in the torque converter, but after the project was revisited, a dampener ultimately made its way into the final design before Job 1.[clarification needed] The XT-LOD was initially abandoned in 1966, but revisited in 1974 as a result of rising gas prices. The transmission was introduced when Ford downsized its full size line for 1979. Initially called XT-LOD (Extension Lock-Up Overdrive), its name was changed when revisited in 1974 to FIOD (Ford Integrated Overdrive) and then to its final name in 1979, the Ford AOD transmission.[3]

GAZ copy[edit]

Despite the Cold War, the Soviet Union, in developing its automotive industry, would often base its produce on western technology, from whom it would either purchase a full licence (the GAZ factory was designed by the Ford Motor company, later the infamous Lada factory would be built by Fiat etc.) or make an indigenous copy by reverse engineering. In the 1950s, as the GAZ plant was preparing to launch its new generation of cars, that comprised the mid-size GAZ-21 Volga sedan and the full-size GAZ-13 Chaika limousine, it was specified that both vehicles feature the automatic transmission. Having evaluated many models, Borg-Warner's Fordomatic and Cruise-o-matic were selected.

Despite very closely resembling the American transmissions, GAZ's copies did have distinctive differences. First of all - their components were adopted to the metric units. Their gear ratios - to the car's engines. Both cars' handbrake actuated a central drum between the housing and the drive shaft, instead of the rear wheels. Thus a parking pawl was deemed redundant. Volga's transmission, based on the Fordomatic, required additional adaptation to the air-cooled torque converter, as it was driven by a 65 hp 4 cylinder engine. Controlled by a steering column mounted lever, it had four regimes: Зх-Н-Д-П (R-N-D-L). In Drive the car would start in second and automatically shift to third depending on throttle position (the valve was regulated by a lever linked to the accelerator pedal). A kick-down feature was also present. First gear could only be engaged manually in Low (though it could be engaged if the car was in motion, but would only donwshift) and was used for engine braking or rapid starts. Gear ratios were: 2.4 - 1.0 for the torque converter, 2.84 for first gear, 1.68 for second, third was direct and reverse was 1.72.

Chaika's Cruise-o-matic copy required less adaptations, due to its mating with a 195 hp V8 engine. The transmission was controlled by a dial-button panel with four regimes: Зх, Н, Д, Т corresponding to Reverse, Neutral, Drive and "Braking". In Drive the car was would start in first and sequentially shift to third and back. In "Braking" (i.e. engine braking), third gear would be locked out, and the first gear would be engaged by the rear band immobilizing the planetary carrier, rather than the one-way sprag clutch (absent on Volga's transmission). The more powerful engine and thus torque required a liquid cooling system. Gear ratios were identical to GAZ-21, except for the torque converter, which had a maximum multiplication of 2.5.

Both transmissions made a début in 1958 and 1959 respectively. Initially it was planned that all of the private owned Volga's be produced with the automatic, whilst a more Spartan trimmed taxi version feature the three-speed manual. However, most of these cars were given as prizes to workers of distant regions for excellent results, instead of being kept in large cities, were they would be more practical. The "lucky" customers had great difficulty in obtaining adequate spare parts, qualified service and most of all, transmission fluid. As a result many chose to simply convert their transmission to the common three speed manual (that was a common universal model used in the GAZ-69 jeep and Volga's predecessor, the GAZ Pobeda). Although the option was formally discontinued in 1964, most of the 700 cars were produced in the 1958 MY. As of 2017 only six such survivors are known.

Chaika's on the other hand was solely available with the transmission, and in 1962 it received a slight upgrade in number of clutch packs and piston shapes. Never available for private ownership, the car was produced in small scale all the way until 1981. In 1963, GAZ introduced the world's first Q-car, the GAZ-23, by transplanting the large V8 engine and the powertrain of the Chaika into the unibody Volga. The transmission was adapted to the steering column shifter. This car was primarily used as a motorcade escort by the KGB's ninth directive (responsible for personal security).

In 1970 GAZ-21 Volga was replaced by GAZ-24 and the V8 adoption followed soon, dubbed GAZ-24-24. As the sedan's standard gearbox was now a four on the floor manual, the selector lever was accordingly altered. Unofficially these cars were called "Chasers", and despite their novelty, the engine torque was disproportional to the chassis ability (to prevent excessive burnouts, the factory improvised by adding a 100 kg metal plate into the boot rather than altering the suspension design). This meant a very low service life and also required very professional driving. For that reason, the factory did not even bother creating a special select indicator, and externally it resembled a manual transmission gearshift lever (some cars even lacked a single brake pedal, and instead had the clutch/brake pedal layout that dubbed each other). The GAZ-24 had the common cord-actuated parking brakes, thus the central shaft brake was removed and replaced by an extension housing to fit the shorter driveshaft of the GAZ-24. GAZ-24-24 would be produced alongside standard GAZ-24 until 1985. That year the car got a major facelift and internal modernisation with engine and chassis elements from the GAZ-3102 Volga, resulting in the GAZ-24-10 model. The Chaser became GAZ-24-34 and was produced until 1993.

In 1977 GAZ launched its successor to the GAZ-13, the GAZ-14 Chaika. The new limousine had a more powerful engine, 220 hp, and its transmission was revised. Like for the GAZ-24, the central transmission brake was removed, but unlike the sedan, it now had a parking pin. The floor mounted selector got an international P-R-N-D-2-1 lettering. Regime "1" now operated first gear only, via the rear band, whilst regime "2" locked out the first gear (like on the original GAZ-21 Volga). Gear ratios were now 2.35 - 1.0 for torque coverter, 2.64 for first gear, 1.55 for second, third remained direct, and reverse became 2.0. The car was produced from 1977 until 1989. In 1981 GAZ launched what was to be a successor to the GAZ-24, but separated into a separate model and built alongside the -24, the GAZ-3102 Volga. It too gained a "chaser" modification - GAZ-31013 with the 220 hp engine from the GAZ-14, and its transmission, adopted to Volga's body. This model was built until 1996.

As only partial statistics have been published, it is difficult to count the total amount of transmissions built (including replacements). What is known that 3189 GAZ-13 Chaikas, 1120 GAZ-14 Chaikas, 608 GAZ-23 Chasers were built, in addition to the ~700 original GAZ-21 Volgas. Anywhere between 2 and 2.5 thousand GAZ-24-24, 24-34 and 31013 Chasers can be added. Thus approximately 8000 vehicles were manufactured by the plant from 1958 to 1996 featuring a cruis-o-matic based transmission.

See also[edit]

References[edit]

  1. ^ a b Flory, Jr., J. "Kelly" (2008). American Cars, 1946-1959 Every Model Every Year. McFarland & Company, Inc., Publishers. ISBN 978-0-7864-3229-5. 
  2. ^ "A Brief History of Ford Automatic Transmissions". Baumann Engineering. Retrieved 2011-11-20. 
  3. ^ "Ford Automatic Transmissions: An Anecdotal History" (PDF). ATEO Communicators. Retrieved 2012-01-02.