AQ231A; AQ231B; AQ231LB; 290A; DP-A; SP-A; 275A; 285A Transmissions Drive Unit Parts on group Drive Unit: Pos. Part No Qty Parts name Comments 1. 854015 [1] Drive 2. 854022 [1] Upper gear 2. 3803114 [1] Upper gear, exch 3. 7743460_058 interm housing 4. 854038 [1] Lower gear 4. 875192 [1] Gasket kit See group 10A Parts catalog : Drive Unit Lower Gear Unit Intermediate Housing Upper Gear Unit Lower Gear Unit Lower Gear Unit Duoprop Drive Unit Upper Gear Unit Intermediate Housing Lower Gear Unit Upper Gear Unit Intermediate Housing