Model 800.1 with transmission 715.386/536 with code GG3Y (VIAB start-off and braking system) Model 800.3 with fluid coupling Model 930, 932, 934 with code GK8 (Turbo clutch) Model 963, 964 with code A1H (Hydraulic Auxiliary Drive (HAD)) Model 963, 964 with code G3Y (Turbo retarder clutch)ws2500n0017b