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What is the transmission of a 1993 Buick roadmaster?

The 1993 Buick Roadmaster could be equipped with one of two transmissions: the Turbo-Hydramatic 4T60-E or the Turbo-Hydramatic 4L60-E. The 4T60-E is a four-speed automatic transmission with overdrive, while the 4L60-E is a four-speed automatic transmission without overdrive. Both transmissions are electronically controlled and feature a lock-up torque converter.