This GCU501 is a powerful transmission controller and logger packaged in a compact and environmentally sealed ABS casing. Connectivity is with standard DTM connectors and communication link is via a simple USB connection. The programming of the GCU 501 is done through the simple to use Shiftec software that features ready set up tabs and templates. The GCU501 provides identical functionality to the GCU500 but with the addition of TPS input and output control and processing that allows the GCU to control drive by wire throttle systems to produce the up change torque reduction and down change blip via throttle position change.DBW throttle TPS input/output control and processing6 analogue inputs including 2 differential inputsDedicated speed inputFull closed loop 3 stage shift controlAuto upshift strategyOff condition shifts (on throttle down shift, off throttle up shift)Sophisticated diagnostics and state machinesCAN link enabledFully featured safety features and fail safe parametersCAN