Pre-Power Stroke Diesel (7.3L IDI & 6.9L)Diesel Topics Only
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(a) - Ford design conventional axles use Rear Axle Lubricant XY-90-QL or -KL (ESP-M2C154-A) or equivalent.
(b) - Service refill capacities are determined by filling the axle with the specified lubricant to the bottom of the filler hole with the vehicle in running position.
(c) - Plus 8 oz. (U.S. measure) additive friction modifier, C8AZ-19B546-A (EST-M2C118-A) or equivalent for limited-slip applications.
(d) - 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.
Note: 6.5 pints of lubricant is the fill specification when the axle is installed in the vehicle. If the axle is out of the vehicle, fill with 7.5 pints of specified lubricant.
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