MD40A; TMD40A; TMD40B; TMD40C; AQD40A; TAMD40A; TAMD40B; AD40B; AQAD40A; AQAD40B Transmissions Duoprop Drive Unit: DP280 Parts on group Duoprop Drive Unit: DP280: Pos. Part No Qty Parts name Comments 1. 852411 [1] Drive E.u, ratio 1,95:1 1. 852412 [1] Drive E.u, ratio 2,30:1 2. 851340 [1] Upper gear 3. 7744060_100 interm housing 4. 852193 [1] Lower gear E.u, ratio 1,95:1 4. 852408 [1] Lower gear E.u, ratio 2,30:1 4. 875741 [1] Gasket kit See group 10A Parts catalog : Aquamatic Drive Unit: DRIVE 290 Aquamatic Drive Unit: DRIVE 280 Reverse Gear MS3C: 852503 Reverse Gear MS3C: 852502 Reverse Gear MS3C: 852501 Reverse Gear MS3B: 852001 Duoprop Drive Unit: DP290 Upper Gear Unit Upper Gear Unit Intermediate Housing Intermediate Housing AQ Drive Unit 290 Lower Gear Unit