Hudson Commodore

Differential fluid capacity & service interval

Hudson Commodore differential fluid capacity ranges from 1,24 kg to 1,6 kg. Service intervals include checking at 1000 miles and changing at 10000 miles. The data covers 6 configurations.

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

TypeSpecifications
  • Commodore Eight (1951-1952)
  • Rear
  • Use: Normal
  • Capacity 1,6 kg
  • Capacity 1,4 kg (Hydra-Matic models)
  • Check 1000 miles
  • Change 10000 miles
  • Commodore Six (1951-1952)
  • Rear
  • Use: Normal
  • Capacity 1,6 kg
  • Capacity 1,4 kg (Hydra-Matic models)
  • Check 1000 miles
  • Change 10000 miles
  • Commodore Eight (1948-1951)
  • Rear
  • Use: Normal
  • Capacity 1,6 kg
  • Check 1000 miles
  • Change 10000 miles
  • Commodore Six (1948-1951)
  • Rear
  • Use: Normal
  • Capacity 1,6 kg
  • Check 1000 miles
  • Change 10000 miles
  • Commodore Eight (1941-1947)
  • Rear
  • Use: Normal
  • Capacity 1,24 kg
  • Check 1000 miles
  • Change 10000 miles
  • Commodore Six (1941-1947)
  • Rear
  • Use: Normal
  • Capacity 1,24 kg
  • Check 1000 miles
  • Change 10000 miles

Additional Notes

  • The Hudson Commodore Eight and Commodore Six share identical rear differential fluid capacities across all equivalent model year ranges, indicating a common rear axle assembly between the six-cylinder and eight-cylinder variants throughout the 1941-1952 production span.
  • Both the Commodore Eight and Commodore Six carried a rear differential capacity of 1.24 kg for the 1941-1947 model years, a figure consistent with the smaller rear axle housings typical of American passenger cars from the early 1940s.
  • A capacity increase from 1.24 kg to 1.6 kg occurred between the 1941-1947 and 1948-1951 configurations on both the Six and Eight variants, reflecting a larger rear differential unit introduced with the postwar body redesign Hudson adopted for 1948.
  • For 1951-1952 models equipped with Hydra-Matic transmission, the rear differential capacity is specified at 1.4 kg rather than the standard 1.6 kg, a difference of 0.2 kg that suggests a dimensionally distinct axle assembly was paired with the automatic transmission option.
  • The Hydra-Matic transmission was an automatic unit sourced from General Motors and offered as an option on Hudson vehicles in the early 1950s, which accounts for the separate capacity specification appearing within the 1951-1952 row for both the Six and Eight.
  • The 1951 model year appears in two separate row configurations, covering both the 1948-1951 range and the 1951-1952 range, meaning 1951 Commodore models may fall under either specification depending on the specific production variant or transmission type.
  • A check interval of 1,000 miles is specified uniformly across all configurations and model years, a relatively short inspection interval by modern standards that reflects the service expectations and road conditions common to mid-twentieth century American automotive maintenance practice.
  • The fluid change interval of 10,000 miles applies consistently across all Commodore Six and Eight configurations from 1941-1952 under normal use conditions, with no variation between the pre-war, early postwar, or late postwar specifications.

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