Case - IH STX

Manual transmission fluid capacity & service interval

Case IH STX requires manual transmission fluid with a capacity of 76 liters. Service intervals include checking every 10 hours and changing every 1500 hours. The data covers 6 configurations.

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

TypeSpecifications
  • STX 275 / STX 275 AccuSteer (2000-2005)
  • Manual/P.T.O.
  • Use: Normal
  • Capacity 76 liter
  • Check 10 hours
  • Change 1500 hours
  • STX 375 / STX 375 AccuSteer (2000-2005)
  • Manual/P.T.O.
  • Use: Normal
  • Capacity 76 liter
  • Check 10 hours
  • Change 1500 hours
  • STX 375 / STX 375 Heavy Duty (2000-2005)
  • Manual/P.T.O.
  • Use: Normal
  • Capacity 76 liter
  • Check 10 hours
  • Change 1500 hours
  • STX 375 QUADTRAC (2000-2005)
  • Manual/P.T.O.
  • Use: Normal
  • Capacity 76 liter
  • Check 10 hours
  • Change 1500 hours
  • STX 440 (2000-2005)
  • Manual/P.T.O.
  • Use: Normal
  • Capacity 76 liter
  • Check 10 hours
  • Change 1500 hours
  • STX 440 QUADTRAC (2000-2005)
  • Manual/P.T.O.
  • Use: Normal
  • Capacity 76 liter
  • Check 10 hours
  • Change 1500 hours

Additional Notes

  • The Case-IH STX series manual transmission and PTO system carries a fluid capacity of 76 liters across all six configurations listed for 2000-2005, including the STX 275, STX 375, and STX 440 variants. A 76-liter fill volume reflects the scale of a shared transmission housing that serves both the gearbox and power take-off functions within a single fluid circuit.
  • Combining the transmission and PTO into one fluid system, as noted in the specifications, means a single 76-liter charge lubricates both drivetrain functions simultaneously. Separate systems on other equipment would typically carry independent capacities, so the unified volume here accounts for the total wetted area of both components.
  • A fluid level check interval of 10 operating hours applies uniformly across all listed STX configurations. In heavy agricultural equipment, a 10-hour check interval is consistent with daily or near-daily inspection during active field seasons, given that tractors in this class can accumulate hours rapidly under continuous use.
  • The fluid change interval is set at 1500 hours under normal use conditions for every configuration in the STX 2000-2005 range. At typical annual usage rates for large row-crop or tillage tractors, 1500 hours can represent multiple seasons of operation before a drain-and-fill service is required.
  • The AccuSteer designation appears on both the STX 275 and STX 375, yet the transmission fluid capacity and service intervals for those variants are identical to the standard and Heavy Duty STX 375 configurations. AccuSteer refers to a steering system feature rather than a change in transmission architecture, which is consistent with the shared 76-liter capacity figure.
  • The STX 375 is represented by three distinct configurations in the specifications: the standard model, the AccuSteer variant, and the Heavy Duty variant. All three share the same 76-liter capacity and 1500-hour change interval, indicating the transmission assembly itself is common across those STX 375 build levels.
  • Both QUADTRAC configurations, the STX 375 QUADTRAC and STX 440 QUADTRAC, carry the same 76-liter transmission fluid specification as the wheeled variants in the same model year range. QUADTRAC denotes a four-track undercarriage system, but the transmission and PTO fluid circuit remains consistent with the rest of the STX lineup.

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