Fiat Duna, 146 (EU)

Manual transmission fluid capacity & service interval

Fiat Duna and 146 (EU) models utilize manual transmission fluid with a capacity of 2,4 liters. Service intervals include checking at 20000 km and changing at 40000 km or 24 months. The data covers 2 configurations.

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

TypeSpecifications
Duna 70, Weekend 70 (1987-1992)
  • Use: Normal
  • Capacity 2,4 liter
  • Check 20000 km
  • Change 40000 km/ 24 months
  • Code: 5/1
Duna 60, Weekend 60 (1986-1992)
  • Use: Normal
  • Capacity 2,4 liter
  • Check 20000 km
  • Change 40000 km/ 24 months
  • Code: 5/1

Additional Notes

  • Both the Duna 60 and Duna 70 variants share an identical manual transaxle fluid capacity of 2.4 liters, which is a typical fill volume for a compact integrated gearbox and differential unit of this era.
  • The Fiat Duna 146 manual transaxle uses a combined gearbox and differential housing, meaning the 2.4-liter capacity covers both functions within a single fluid reservoir rather than separate fills.
  • Under normal use conditions, the transaxle fluid change interval is set at 40,000 km or 24 months, whichever comes first, applying equally across the 60 and 70 variants.
  • The 24-month time limit paired with the 40,000 km distance interval means fluid replacement is triggered by elapsed time even when mileage accumulation is low, reflecting the degradation properties of gear oils over time regardless of use.
  • A separate fluid level check interval of 20,000 km is specified under normal use conditions, placing an inspection point at the halfway mark between each full fluid change.
  • The Duna 70 and Weekend 70 entered production in 1987, one year after the Duna 60 and Weekend 60, yet both share identical transaxle fluid specifications throughout the 1987-1992 period where production overlapped.

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