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The AOD (automatic overdrive) is a four-speed automatic transmission, with the 4th gear as overdrive. Introduced in 1980, it was Ford's first four-speed automatic overdrive transmission. The gearset design is based on the Ford "X" automatic transmissions used during the 1950s, '60s, and '70s.
3rd gear: off: on 4th gear: on: on No power results in 2nd gear as "limp home mode." Applications. 1991–2007 Chevrolet C/K/Chevrolet Silverado/GMC Sierra 2500 and 3500;
The first mass-produced fully-automatic transmission developed for passenger automobile use was the GM Hydramatic introduced in 1940. [1] The Hydramatic was a big success, and had been installed in the majority of GM models by 1950.
The police package (9C1) B-body cars featured a First Gear Block Out (FGBO) Plate on the transmission housing to prevent drivetrain damage. The shift point for first to second gear is about 43 MPH (69 km/h) while second to third gear shift point is about 83 MPH (134 km/h) assuming a 3.08:1 differential and a 5,500 RPM engine speed limit.
For 1991, the THM400 gained a 4th gear and electronic controls, becoming the 4L80-E; designed for applications over 8,600 lb GVWR, the transmission was paired with the 7.4 L and 6.2 L engines. [ 15 ] For 1992, GM introduced its first turbodiesel V8, expanded to 6.5 L displacement; the 180 hp (134 kW) engine was only available in trucks above ...
Unlike in the W58 the 5th/overdrive gear set was changed to create a smaller rpm drop between 4th & 5th gears so as to remain close to the overdrive ratio seen in the other boxes. The rest of the transmission remains unchanged. Ratios: First Gear: 3.285:1; Second Gear: 1.894:1; Third Gear: 1.275:1; Fourth Gear: 1.00:1; Fifth Gear: 0.861:1 ...
The "MN4" 4T40E is able to handle vehicles up to 4000 lb (1814 kg) GVWR. The final drive ratio can vary depending on the car's curb weight and3wweteeengine power output. 3.91, 3.63, 3.29, 3.05, 3.69, and 3.42 are all of the available ratios used in the 4T40 (and 4T45) transmission; Made possible by using combinations selected from 3 different sprocket combinations (32/38, 35/35, 33/37) and 2 ...
After its introduction in 1984, the Justy was also available with 4WD and thus a different gearbox. The gear ratios for this gearbox were altered slightly. In 1994 the normal/FWD gearbox was dropped; one could only get a 4WD gearbox by then. Gear ratios: 1st 3.071 2nd 1.695 3rd 1.137 4th .771 5th .631, Rev 3.461 Final 5.200