Peterbilt On highway trucks

Automatic transmission fluid capacity & service interval

Peterbilt On highway trucks utilize Automatic transmission fluid with a capacity of 45 liters. The data covers 2 configurations.

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

TypeSpecifications
579 (2012-2013)
  • Use: Normal
  • Capacity 45 liter (deep sump)
  • Code: Allison 4000HS 5/1
579 (2012-2013)
  • Use: Normal
  • Capacity 45 liter (deep sump)
  • Code: Allison 4500HS 5/1

Additional Notes

  • The Peterbilt 579 automatic transmission carries a 45-liter fluid capacity under normal use conditions, which reflects a deep sump configuration rather than a standard pan fill.
  • A deep sump design increases the total fluid volume held in the transmission pan, which is associated with greater thermal mass and extended fluid life compared to shallower sump arrangements.
  • The 45-liter figure applies to the 2012-2013 model years of the 579, and represents the full service fill volume for the automatic transmission system.

Other Systems