AQ311A; AQ311B Transmissions Aquamatic Drive Unit Parts on group Aquamatic 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. 7743550_032 interm housing 4. 854038 [1] Lower gear 4. 875192 [1] Gasket kit See group 10A Parts catalog : Lower Gear Unit Intermediate Housing Upper Gear Unit Aquamatic Drive Unit Hydraulic Pump, Trim Instrument and Installation Components Connecting Components Drive Unit Sp, DP AQ311B Upper Gear Unit Intermediate Housing Lower Gear Unit