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Information about GM's 6-speed 6L90 MYD Hydra-Matic transmission, including details, specifications, vehicle applications, and ... The 6L90 is a heavy-duty version of the 6L80 six-speed ...
General Motors' Ypsilanti Transmission Operations is producing a new variant of its Hydra-Matic rear-wheel-drive six-speed transmission. The new 6L90 six-speed electronically controlled automatic ...