AQ171A; AQ171C Transmissions Drive Unit Parts on group Drive Unit: Pos. Part No Qty Parts name Comments 1. 854019 [1] Drive 2. 854022 [1] Upper gear 2. 3803114 [1] Upper gear, exch 3. 7744670_034 interm housing 4. 854039 [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 AQ Drive Unit SP-A AQ171A, AQ171C Upper Gear Unit Intermediate Housing Lower Gear Unit