Morris 1800/2200, ADO17

Additional Notes

• The Morris 1800/2200 ADO17 automatic transmission is housed in a transaxle unit, meaning the gearbox and final drive are combined into a single assembly rather than separated as in conventional rear-wheel-drive layouts.
• The 1800 Mk II automatic, covering 1968-1972, carries a service fill capacity of 4.4 liters, which represents the amount of fluid needed when draining and refilling during routine maintenance without fully disassembling the unit.
• The total system capacity for the 1800 Mk II automatic stands at 7.4 liters, a figure that reflects the full fluid volume including all internal passages and the torque converter when the transaxle is completely emptied, such as during an overhaul.
• The gap between the 4.4-liter service fill and the 7.4-liter total capacity on the 1800 Mk II indicates that a standard drain procedure does not recover the fluid retained in the torque converter, which is a common characteristic of automatic transmissions without a converter drain plug.
• The 1800 Mk III automatic, spanning 1973-1975, shares identical service fill and total capacity figures with the Mk II, at 4.4 liters and 7.4 liters respectively, indicating no change in fluid volume requirements between those two generations.
• The 2200 Mk III automatic, covering 1972-1975, lists a total capacity of 7.4 liters alongside a separately stated torque converter capacity of 3 liters, giving a more detailed breakdown of where fluid is distributed within the transaxle system.
• The 3-liter torque converter figure on the 2200 Mk III represents a substantial portion of the 7.4-liter total, accounting for roughly 40 percent of the entire fluid volume in the assembly.
• All three configurations carry the same normal use condition, meaning the stated capacities and service parameters apply to standard operating circumstances rather than a modified severe-duty schedule.