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All 8L transmissions are based on the same globally patented gearset concept as the ZF 8HP from 2008. While fully retaining the same gearset logic, they differ from this only in the patented [1] arrangement of the components with gearsets 1 and 3 swapped.
The General Motors Automatic Safety Transmission (AST) was a semi-automatic transmission released in 1937. The first mass-produced fully-automatic transmission developed for passenger automobile use was the GM Hydra-Matic introduced in the autumn of 1939 as a (very likely subsidized) $57 option for the 1940 Oldsmobile. [1]
The Ford–GM 10-speed automatic transmission is part of a joint venture between Ford Motor Company and General Motors to design and engineer two transmissions: a longitudinal 10-speed transmission and a transverse 9-speed trans-axle.
General Motors will face a class action lawsuit related to its 8L45 and 8L90 eight-speed automatic transmissions, which were installed in at least 800.000 vehicles from 2015-2019.
The 6th U.S. Circuit Court of Appeals said a lower court judge had discretion to let drivers sue in groups over Cadillac, Chevrolet and GMC vehicles equipped with 8L45 or 8L90 eight-speed ...
The 8HP 70 transmission with the gearset 4 in 23-85-teeth-configuration was the pilot series and therefore without generation designation. It was first used in the BMW 7 Series (F01) 760Li, has a torque handling limit of 700 N⋅m (516 lb⋅ft), and weighs 87 kg (192 lb).
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This revised fluid was introduced in GM Technical Service Bulletin 18-NA-355 in December 2018. The revision is to help correct a torque converter clutch shudder in the GM 8L90 and 8L45 automatic transmissions after a complete flush of the system. DEXRON LV ATF LV is made by Mobil and is marketed as Mobil-1 LV ATF HP.