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The 8L 90 is the subject of a class-action lawsuit filed in December 2018 that alleges the transmission suffers from persistent "shudder" issues and that GM has known about the problems since its introduction and has failed to provide a solution, instead choosing to wait until the unit is out of warranty. [16]
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.
General Motors was ordered by a federal appeals court to face a class action claiming it violated laws of 26 U.S. states by knowingly selling several hundred thousand cars, trucks and SUVs with ...
The service manager explained that the transmission fluid was specifically designed for the 8L90 transmission. He advised that this fluid is hydroscopic (as most hydraulic fluids tend to be). Over time the moisture content in the fluid begins to affect the function of the transmission.
DEXRON is the trade name for a group of technical specifications for automatic transmission fluid (ATF) created by General Motors (GM). The name was first registered as a trademark and later evolved into a brand of GM.
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Automatic transmission fluids have many performance-enhancing chemicals added to the fluid to meet the demands of each transmission. [ citation needed ] Some ATF specifications are open to competing brands, such as the common DEXRON specification, where different manufacturers use different chemicals to meet the same performance specification.