Peterbilt On highway trucks

Manual transmission fluid capacity & service interval

Peterbilt On highway trucks utilize manual transmission fluid with a capacity range of 11 to 13 liters. Service intervals include 800000 km or 300000 km/36 months. The data covers 12 configurations.

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

TypeSpecifications
  • 579 (2012-2013)
  • 10-speed
  • Use: Extended, line haul
  • Capacity 11 liter
  • Change 800000 km
  • Code: FAO, FAOM, FR, FRM, FRW, FRO Eaton Fuller 10/2
  • 579 (2012-2013)
  • 10-speed
  • Use: Extended, vocational/bus
  • Capacity 11 liter
  • Change 300000 km/ 36 months
  • Code: FAO, FAOM, FR, FRM, FRW, FRO Eaton Fuller 10/2
  • 579 (2012-2013)
  • 10-speed
  • Use: Extended, line haul
  • Capacity 12 liter
  • Change 800000 km
  • Code: LAS 10B, LAS 10C, VAS Eaton Fuller 10/2
  • 579 (2012-2013)
  • 10-speed
  • Use: Extended, vocational/bus
  • Capacity 12 liter
  • Change 300000 km/ 36 months
  • Code: LAS 10B, LAS 10C, VAS Eaton Fuller 10/2
  • 579 (2012-2013)
  • 10-speed
  • Use: Extended, line haul
  • Capacity 13 liter
  • Change 800000 km
  • Code: VCS Eaton Fuller 10/3
  • 579 (2012-2013)
  • 10-speed
  • Use: Extended, vocational/bus
  • Capacity 13 liter
  • Change 300000 km/ 36 months
  • Code: VCS Eaton Fuller 10/3
  • 579 (2012-2013)
  • 13-speed
  • Use: Extended, line haul
  • Capacity 13 liter
  • Change 800000 km
  • Code: MHP, VHP, RTLO Eaton Fuller 13/3
  • 579 (2012-2013)
  • 13-speed
  • Use: Extended, vocational/bus
  • Capacity 13 liter
  • Change 300000 km/ 36 months
  • Code: MHP, VHP, RTLO Eaton Fuller 13/3
  • 579 (2012-2013)
  • 15-speed
  • Use: Extended, line haul
  • Capacity 13 liter
  • Change 800000 km
  • Code: RT, RTO Eaton Fuller 15/3
  • 579 (2012-2013)
  • 15-speed
  • Use: Extended, vocational/bus
  • Capacity 13 liter
  • Change 300000 km/ 36 months
  • Code: RT, RTO Eaton Fuller 15/3
  • 579 (2012-2013)
  • 18-speed
  • Use: Extended, line haul
  • Capacity 13 liter
  • Change 800000 km
  • Code: MXP, VXP, RTLO Eaton Fuller 18/4
  • 579 (2012-2013)
  • 18-speed
  • Use: Extended, vocational/bus
  • Capacity 13 liter
  • Change 300000 km/ 36 months
  • Code: MXP, VXP, RTLO Eaton Fuller 18/4

Additional Notes

  • The Peterbilt 579 (2012-2013) manual 10-speed transmission is listed with three distinct fluid capacities: 11, 12, and 13 liters, reflecting that different physical transmission units within the same speed configuration can vary in total fluid volume.
  • The 13-speed, 15-speed, and 18-speed manual transmissions in the 579 (2012-2013) all share a uniform 13-liter capacity, meaning no variation in fill volume exists across those three gearbox configurations.
  • Under extended line haul use conditions, the 10-speed, 13-speed, 15-speed, and 18-speed manual transmissions all carry a change interval of 800,000 km, which is an exceptionally long drain interval made possible by extended-life fluid formulations suited to sustained highway operation.
  • Under extended vocational/bus use conditions, the change interval drops to 300,000 km or 36 months, whichever comes first. The addition of a time-based limit alongside the distance figure reflects the more variable and demanding duty cycles associated with vocational and bus applications, where mileage accumulation may be slower but fluid degradation can still occur over time.
  • The 800,000 km line haul interval is more than double the 300,000 km vocational/bus interval, indicating that use condition is a primary factor in determining how frequently manual transmission fluid requires replacement in the 579 (2012-2013).
  • The 36-month time limit paired with the 300,000 km distance under vocational/bus conditions means a calendar-based change can be reached before the distance threshold, particularly in lower-mileage operations where annual distance accumulation falls below 100,000 km per year.

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