Volvo Light cross-country truck series (EU)

Transfer case fluid capacity & service interval

Volvo Light cross-country truck series (EU) requires transfer case fluid with a capacity of 1,3 liters. Service intervals include checking every 1250 km or 5000 km/6 months and changing every 10000 km or 30000 km/12 months. The data covers 4 configurations.

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

TypeSpecifications
C303, TGB11(xx) (1974-1984)
  • Use: Normal
  • Capacity 1,3 liter
  • Check 5000 km/ 6 months
  • Change 30000 km/ 12 months
  • Code: Volvo FD 51 2
C304, TGB13(xx) (1974-1984)
  • Use: Normal
  • Capacity 1,3 liter
  • Check 5000 km/ 6 months
  • Change 30000 km/ 12 months
  • Code: Volvo FD 51 2
C306, TGB21/22 (1974-1984)
  • Use: Normal
  • Capacity 1,3 liter
  • Check 5000 km/ 6 months
  • Change 30000 km/ 12 months
  • Code: Volvo FD 51 2
L3314 (Välp), PLTGB903 (1962-1977)
  • Use: Normal
  • Capacity 1,3 liter
  • Check 1250 km
  • Change 10000 km

Additional Notes

  • Across the C303/TGB11(xx), C304/TGB13(xx), and C306/TGB21/22 configurations covering 1974-1984, the transfer case fluid capacity is 1.3 liters, a figure consistent with a service fill rather than an overhaul fill, meaning fluid added during routine maintenance rather than a complete drain-and-refill of a disassembled unit.
  • The L3314 (Välp)/PLTGB903 covering 1962-1977 also carries a 1.3-liter transfer case capacity, placing all four configurations at the same fill volume despite spanning different generations of the Volvo light cross-country truck series.
  • Under normal use conditions, the C303/TGB11(xx), C304/TGB13(xx), and C306/TGB21/22 share a fluid check interval of every 5,000 km or 6 months, whichever comes first, reflecting a time-based threshold alongside a distance-based one.
  • The fluid change interval for the C303/TGB11(xx), C304/TGB13(xx), and C306/TGB21/22 under normal use is 30,000 km or 12 months, meaning the annual calendar limit can trigger a change well before the distance threshold is reached in low-mileage operation.
  • The L3314 (Välp)/PLTGB903 under normal use carries a check interval of 1,250 km with no time-based alternative stated, a considerably shorter distance interval than the 5,000 km specified for the 1974-1984 configurations.
  • The fluid change interval for the L3314 (Välp)/PLTGB903 is 10,000 km under normal use, also without a parallel time-based limit, which contrasts with the 30,000 km change interval applied to the later C303, C304, and C306 variants.
  • The ratio between the check and change intervals differs between the two generations. On the L3314 (Välp)/PLTGB903, a change is due every eight check cycles, while on the 1974-1984 configurations, a change falls every six check cycles, indicating a different maintenance cadence structure between the older and newer platforms.

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