The lawsuit lets any driver who purchased a Cadillac, Chevrolet, or GMC vehicle with an 8L45 or 8L90 eight-speed automatic transmission found in 2015 to 2019 models years to join the class action ...

The GM-developed Hydra-Matic 8L90 eight-speed is approximately the same size and weight as the Hydra-Matic 6L80 six-speed automatic. Its 7.0 overall gear ratio spread is wider than GM’s six ...

Per Reuters, the issue concerns the 8L45 and 8L90 eight-speed automatic gearboxes sold from model years 2015 to 2019, ...