Audi A8, S8, 4E (USA)

Transfer case fluid capacity & service interval

Audi A8, S8, 4E (USA) transfer case fluid capacity ranges from 0,5 to 1,1 liters. Service intervals include checks at 15000 to 20000 miles or 12 to 24 months. The data covers 16 configurations.

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

TypeSpecifications
A8 4.2 V8 quattro (257 kW) (2007-2010)
  • Use: Normal
  • Capacity 0,5-0,6 liter
  • Check 20000 miles/ 24 months
A8 4.2 V8 quattro (257 kW) (2007-2010)
  • Use: First check only
  • Capacity 0,5-0,6 liter
  • Check 15000 miles/ 24 months
A8 6.0 W12 quattro (331 kW) (2007-2009)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 20000 miles/ 24 months
A8 6.0 W12 quattro (331 kW) (2007-2009)
  • Use: First check only
  • Capacity 1,1 liter
  • Check 15000 miles/ 24 months
S8 5.2 V10 FSI quattro (331 kW) (2007-2009)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 20000 miles/ 24 months
S8 5.2 V10 FSI quattro (331 kW) (2007-2009)
  • Use: First check only
  • Capacity 1,1 liter
  • Check 15000 miles/ 24 months
A8 4.2 V8 quattro (257 kW) (2006-2007)
  • Use: Normal
  • Capacity 0,55 liter
  • Check 20000 miles/ 12 months
A8 4.2 V8 quattro (257 kW) (2006-2007)
  • Use: First check only
  • Capacity 0,55 liter
  • Check 15000 miles/ 12 months
S8 5.2 V10 FSI quattro (331 kW) (2006-2007)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 20000 miles/ 12 months
S8 5.2 V10 FSI quattro (331 kW) (2006-2007)
  • Use: First check only
  • Capacity 1,1 liter
  • Check 15000 miles/ 12 months
A8 4.2 V8 quattro (246 kW) (2005-2006)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 20000 miles/ 12 months
A8 4.2 V8 quattro (246 kW) (2005-2006)
  • Use: First check only
  • Capacity 1,1 liter
  • Check 15000 miles/ 12 months
A8 6.0 W12 quattro (331 kW) (2004-2007)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 20000 miles/ 12 months
A8 6.0 W12 quattro (331 kW) (2004-2007)
  • Use: First check only
  • Capacity 1,1 liter
  • Check 15000 miles/ 12 months
A8 4.2 V8 quattro (246 kW) (2002-2005)
  • Use: Normal
  • Capacity 1,1 liter
  • Check 20000 miles/ 12 months
A8 4.2 V8 quattro (246 kW) (2002-2005)
  • Use: First check only
  • Capacity 1,1 liter
  • Check 15000 miles/ 12 months

Additional Notes

  • The Audi A8 4.2 V8 quattro rated at 246 kW carries a transfer case fluid capacity of 1.1 liters across both the 2002-2005 and 2005-2006 production periods, a figure that represents a service fill level rather than a full overhaul or dry-fill volume.
  • The 246 kW 4.2 V8 configurations specify a first check only interval of 15,000 miles or 12 months, which is an earlier single inspection point compared to the recurring 20,000-mile or 12-month normal use interval applied to the same unit.
  • The 257 kW variant of the 4.2 V8 quattro introduced for 2006-2007 carries a notably reduced transfer case capacity of 0.55 liters, a significant drop from the 1.1-liter figure associated with the 246 kW version, indicating a different transfer case unit between the two power outputs.
  • For the 257 kW 4.2 V8 quattro covering 2007-2010, the capacity is listed as a range of 0.5-0.6 liters rather than a fixed value, reflecting an acceptable fill window during servicing rather than a precise single figure.
  • The 2007-2010 257 kW configuration also introduces a 24-month time limit alongside the mileage interval, replacing the 12-month ceiling used in earlier 257 kW entries. The first check only interval for the same period similarly shifts to 15,000 miles or 24 months.
  • The A8 6.0 W12 quattro (331 kW) retains a consistent 1.1-liter transfer case capacity across all listed periods from 2004-2009, matching the capacity of the 246 kW V8 configurations rather than the smaller-capacity 257 kW V8 unit.
  • The W12 entries for 2007-2009 adopt the same 24-month time boundary seen in the later 257 kW V8 rows, with normal use intervals set at 20,000 miles or 24 months and the first check only interval at 15,000 miles or 24 months.
  • The S8 5.2 V10 FSI quattro (331 kW) shares the 1.1-liter transfer case capacity with both the W12 and the 246 kW V8 configurations, and the 2006-2007 entries carry the same 12-month time limit structure used in those earlier models.
  • The S8 5.2 V10 FSI quattro entries for 2007-2009 follow the same interval structure as the W12 for the same period, with normal use at 20,000 miles or 24 months and the first check only at 15,000 miles or 24 months, while the 1.1-liter capacity remains unchanged.

Other Systems