FORD 1999 Taurus - Manual (Page 269)

264
Fluid Specifications and Capacities NOTE: Rear axle lube quantities must be replaced
every 100,000 miles (160,000 km) or if the axle
has been submerged in water. Otherwise, the lube
should not be checked or changed unless a leak is
suspected or repair required.
File:12fncs8.ex
Update:Thu Jun 20 14:28:48 1996