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This paper discusses the application of electronics to off-highway vehicle transmission controls. While special problems have to be dealt with in vehicle applications, the growing use of on-board electronics has opened the door to greater utilization of the inherent flexibility of the hydrostatic transmission. Two production electronic control systems are presented as examples. The first is a simple open-loop remote transmission ratio control system. The second is a closed-loop output speed control system with manual and automatic shutdown logic and displays to keep the driver informed of operating conditions.