International Harvester 43 / 45

Differential fluid capacity & service interval

International Harvester 43 / 45 differential fluid capacity is 5,3 liters. Service intervals include checking every 200 hours and changing every 800 hours. The data covers 5 configurations.

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

TypeSpecifications
  • 845 XL, XLA (1983-1985)
  • Front
  • Use: Normal
  • Capacity 5,3 liter
  • Check 200 hours
  • Change 800 hours
  • 743 (1981-1985)
  • Front
  • Use: Normal
  • Capacity 5,3 liter
  • Check 200 hours
  • Change 800 hours
  • 743 XL (1981-1985)
  • Front
  • Use: Normal
  • Capacity 5,3 liter
  • Check 200 hours
  • Change 800 hours
  • 745 S (1981-1985)
  • Front
  • Use: Normal
  • Capacity 5,3 liter
  • Check 200 hours
  • Change 800 hours
  • 745 XL (1981-1985)
  • Front
  • Use: Normal
  • Capacity 5,3 liter
  • Check 200 hours
  • Change 800 hours

Additional Notes

  • The front differential fluid capacity across all listed configurations of the International Harvester 43 / 45 series is 5.3 liters, a figure consistent with a service fill rather than an overhaul fill, as service fills account for residual fluid retained in the housing during a drain.
  • The 743, 743 XL, 745 S, and 745 XL share identical front differential fluid specifications for the 1981-1985 period, with no variation in capacity, check interval, or change interval across those four configurations.
  • The 845 XL and 845 XLA carry the same 5.3-liter front differential capacity and the same service intervals as the earlier 743 and 745 variants, with the 845 XL and 845 XLA entries covering 1983-1985.
  • Under normal use conditions, the front differential fluid check interval is set at 200 hours across all five configurations, meaning fluid level inspection is due well before the change interval is reached.
  • The front differential fluid change interval under normal use conditions is 800 hours for all listed configurations, placing the change at four times the frequency of the check interval.

Other Systems