Mercury Grand Marquis

Automatic transmission fluid capacity & service interval

Mercury Grand Marquis automatic transmission fluid capacity ranges from 11,7 to 13,2 liters. Service intervals include 21000 miles and 30000 miles. The data covers 6 configurations.

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

TypeSpecifications
Grand Marquis 4.6 V8 (2005-2011)
  • Use: Normal
  • Capacity 13,2 liter (Dry fill)
  • Change 30000 miles
  • Code: 4R75E 4/1
Grand Marquis 4.6 V8 (2003-2005)
  • Use: Normal
  • Capacity 13,2 liter (Dry fill)
  • Change 30000 miles
  • Code: 4R70/75 E-W 4/1
Grand Marquis 4.6 V8 (1998-2002)
  • Use: Normal
  • Capacity 13,2 liter
  • Change 30000 miles
  • Code: 4R70W 4/1
Grand Marquis 4.6 V8 (1990-1997)
  • Use: Normal
  • Capacity 13,1 liter
  • Change 30000 miles
  • Code: 4R70W 4/1
Grand Marquis 4.6 V8 (1990-1997)
  • Use: Severe
  • Capacity 13,1 liter
  • Change 21000 miles
  • Code: 4R70W 4/1
Grand Marquis 4.9 V8 (1986-1990)
  • Use: Normal
  • Capacity 11,7 liter

Additional Notes

  • The Mercury Grand Marquis 4.9 V8 covering 1986-1990 carries an automatic transmission fluid capacity of 11.7 liters, which is notably lower than the 13.1-13.2 liter figures associated with the 4.6 V8 configurations across later model years.
  • The 4.9 V8 (1986-1990) row contains no service interval, meaning no change mileage figure is present in the specifications for that configuration.
  • The 4.6 V8 from 1990-1997 holds 13.1 liters of automatic transmission fluid, while the 1998-2002 and later 4.6 V8 configurations carry 13.2 liters, reflecting a small but distinct capacity difference between the earlier and later engine generations.
  • A dry fill designation appears on the 4.6 V8 rows covering 2003-2005 and 2005-2011, indicating the 13.2 liter figure represents total system capacity when the transmission is completely empty, such as during an overhaul or full replacement, rather than a routine service refill.
  • The 1990-1997 4.6 V8 under normal use conditions carries a 30,000-mile change interval, while the same engine under severe use conditions calls for a 21,000-mile interval, a reduction of 9,000 miles tied directly to the demands of more stressful operating conditions.
  • The 30,000-mile change interval under normal use conditions appears consistently across the 4.6 V8 specifications from 1990 through the 2005-2011 range, applying to each of those configurations at the same mileage figure.
  • The severe use interval of 21,000 miles is specified only within the 1990-1997 4.6 V8 row, and no severe use row appears in the specifications for the 1998-2002 or later 4.6 V8 configurations.

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