Austin 3-Litre, ADO61

Manual transmission fluid capacity & service interval

Austin 3-Litre, ADO61 manual transmission fluid capacity ranges from 2,8 to 3,4 liters. Service intervals occur every 10000 km or 6 months. The data covers 1 configuration.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
3-Litre, ADO61 (1967-1971)
  • Use: Normal
  • Capacity 2,8 liter
  • Capacity 3,4 liter (+ overdrive)
  • Check 10000 km/ 6 months
  • Code: 4/1

Additional Notes

  • The Austin 3-Litre ADO61 manual transmission holds 2.8 liters of fluid in the standard configuration, a figure consistent with a service fill for a gearbox of this era and displacement class.
  • When the overdrive unit is fitted, the total manual transmission fluid capacity rises to 3.4 liters, reflecting the additional volume required to lubricate the overdrive mechanism alongside the main gearbox internals.
  • The 0.6-liter difference between the standard and overdrive-equipped capacities represents a meaningful increase, indicating that the overdrive assembly shares a common fluid supply with the main transmission rather than operating as a fully sealed separate unit.
  • Under normal use conditions, the specified check interval for the manual transmission fluid is every 10,000 km or every 6 months, whichever comes first, applying equally to both the standard and overdrive-equipped variants.

Other Systems