Mercury F8AZ-4234-DA Shaft

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Remove the four bolts attaching them to the axle housing and wire them out of the way.

Remove the lock bolt from the differential pinion shaft.

Unbolt the driveshaft from the differential companion flange and wire it aside. Place a floor jack under the differential and raise the rear axle slightly. If applicable, disconnect the safety chain through the coil springs or disconnect the air springs.

Avoid rotating the differential while the pinion shaft is out to prevent the pinion gears from falling out.

Remove the lower mounting bolts of the shock absorbers and the upper suspension arm-to-rear axle housing nuts and bolts. On 1998 and later models, disconnect the four axle-locating arms and the Watts-linkage assembly if present. If equipped with air suspension, disconnect the height sensor. Lower the axle housing until the coil springs are fully extended or remove the air springs. Finally, remove the lower suspension arm-to-axle housing nuts and bolts and lower the axle housing to guide it out from underneath the vehicle.

Avoid rotating the differential while the pinion shaft is out to prevent the pinion gears from falling out.