The GM Hydra-Matic 9TXX 9-speed automatic ... elliptical oval cross-section that reduces the thickness of the torque converter, keeping the overall width of the engine and transmission as narrow ...

The Hydra-Matic 6T45 (production code MH7) is a six-speed automatic transmission produced by ... and features a “hyper-elliptical” oval cross-section shape. This design reduces the thickness ...