Jaguar XJ, X350 / X358 (USA)

Automatic transmission fluid capacity & service interval

Jaguar XJ, X350 / X358 (USA) automatic transmission fluid capacity ranges from 9,5 to 10,05 liters. The data covers 2 configurations.

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

TypeSpecifications
XJ8 4.2 (2004-2008)
  • Use: Normal
  • Capacity 9,5 liter
  • Code: ZF 6HP26 6/1
XJR 4.2 SC (2004-2008)
  • Use: Normal
  • Capacity 10,05 liter
  • Code: ZF 6HP26 6/1

Additional Notes

  • The XJ8 4.2 carries an automatic transmission fluid capacity of 9.5 liters under normal use conditions, a figure typical of a full system service fill that accounts for fluid retained in the torque converter and valve body.
  • The Jaguar XJ XJR 4.2 SC holds 10.05 liters of automatic transmission fluid under normal use conditions, placing it slightly above the XJ8 4.2 in total system capacity.
  • The 0.55-liter difference between the XJ8 4.2 and the XJR 4.2 SC reflects the additional fluid demand associated with the supercharged drivetrain configuration, which generates higher thermal loads and may require a marginally larger fluid volume to maintain adequate lubrication and cooling within the transmission.
  • Both the XJ8 4.2 and XJR 4.2 SC specifications apply across the full 2004-2008 model year range without variation, indicating a consistent transmission assembly across those years for each respective variant.
  • The capacities listed for both variants represent normal use service fills rather than partial drain-and-fill figures, meaning the values reflect the total fluid volume the transmission holds when serviced in its entirety.

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