Owners manual
19
51947/51947MX
Revised
7.31.08
REAR INSTALLATION:
1. Raise the rear of the vehicle enough for the
tires to clear the ground and use jack stands
on the frame to support the truck. Remove
the rear tires and wheels.
2. Support the differential with your floor jack
and remove the OE shock absorbers. It may
be necessary to raise the differential housing
slightly to facilitate their removal.
3. Completely remove the sway bar links from
both ends of the sway bar. Save the fasten-
ers.
4. Remove the OE bolts from the differential
track bar at the upper track bar mount. Save
this hardware.
5. Remove the brake line mount bolt at the up-
per front location of the vehicle gas tank. See
ILLUSTRATION 21.
6. Carefully lower the differential away from
the vehicle and remove the stock springs.
IMPORTANT!: Be very careful not to
damage the brake lines! Remove mounting
brackets as needed to allow the brake lines
freedom of movement sufficient to avoid
damage. Remember to reinstall them when
done.
7. At the OE bump stop, measure from the cen-
ter of the existing hole at the rear 2.800” to-
ward the front of the vehicle and carefully
mark and center punch this location. Keep
the center line between the two holes, parallel
to the vehicle center line. Drill through this
location with a 1/2” drill bit. See ILLUS-
TRATION 22.
8. Using ILLUSTRATION 22 as a guide, install
the bump stop extension plates (90-3146) to
the existing bump stop by first installing one
3/8” X 1” bolt and lock washer through one
of the holes in the bump stop extension.
Slide the nut plate (90-1702) between the OE
bump stop and the lower trailing arm until the
back nut lines up with the hole in the OE
bump stop. Take the bump stop extension
with its bolt and place it on top of the pad and
start the bolt into the nut plate. Rotate the nut
plate to the location of the previously drilled
front hole and start the second 3/8” X 1” bolt
with lock washer into the remaining nut on
the nut plate. Tighten these bolts to 45 ft-lbs
9/16” X 3 1/2” Bolt
7/16” X 1 1/4” Bolt
OE Bolt
& Nut
90-5400
Illustration 20
Passenger Side Shown.
OE Bolt
5/16” X 1” Bolt
90-55089-4
Illustration 21
Rear, Above Fuel Tank