Contacting The Drive, a Toyota spokesman revealed some juicy details about the six-speed manual: “The components used in the gearbox come from a combination of manual transmissions made by ZF, but the combination of parts is exclusive to GR Supra ». To indicate that the transmission has undergone some changes, the one inside the RWD sports coupe has a new but well-known code name: “GS6L50TZ”.
Supra 3.0 gets a manual. Will the Z4 M40i follow?
Why familiar? Because the six-speed manual ZF used by the Z4 sDrive with the four-cylinder engine sounds like the GS6L40LZ. The change from “4” to “5” reflects the changes made to the “type” and the gear. In case you were wondering, “GS6” refers to a 6-speed manual while “Z” comes from the gearbox manufacturer, ZF. For the three-pedal Supra, Toyota engineers have developed a larger-diameter clutch with a more powerful baffle spring. The modifications were necessary so that the 6MT could withstand the torque of 365 lb-ft (500 Nm) of the B58. For comparison, the four-cylinder Z4 with the B48 engine does 236 lb-ft (320 Nm) on the sDrive20i and 295 lb-ft (400 Nm) on the sDrive30i. I know what some of you are probably thinking so far – Why does BMW not offer the Z4 M40i with a six-speed manual transmission? This is a good question that only the company can answer. Soft-top roadster updates were generally few. In fact, there is a worrying rumor that the Austrian-made convertible will be phased out in 2025 with no replacement planned. Source: The Drive
