Rough Country 588.20 - Manual (Page 5)

REAR INSTALLTION
1. Chock front wheels and jack up the rear of the vehicle. Secure with jack stands on the frame rail.
2. Place a floor jack under the rear differential on the rear axle. Using a 18mm wrench for the upper, and 18mm and
15mm wrench for the lower, remove the stock shock absorbers, retain the stock hardware for reuse.
3. Using a 24mm socket, remove the stock u-bolts. Use the floor jack to lower the axle assembly to allow for lifted block
installation..
4. Remove the spring eye bolts and nuts and remove the spring . If equipped: the top mounted block and top mounted
overload spring must be removed. The top spring plate may need to be drilled out to accept the nut for the new
spring center pin. Make sure before starting that you have access to a drill and a 13/16” to 7/8” drill bit. Have c-
clamps in place on either side of each strap before center bolt is removed
5. Unbolt center pin and remove. Un-clamp leaf spring. CAUTION -Take care when releasing the c-clamps since the
springs are under load and will “spring” apart when released.
6. Position add-a-leaf under the next longest leaf of the spring pack. Replace the shorter spring leafs under the helper
leaf and clamp together, being careful to align the center pin holes in the spring leafs. If less lift is desired the leaf
under the new add-a-leaf can be removed
7. Insert the new center pin supplied with the kit through the spring assembly with the head of the center pin in the
same location as the stock pin. Re-compress the pack with the c-clamps, not center pin, to avoid stripping of nut/
bolt threads. Bolt together, being sure to align leafs. Cut off excess threads on the center pin with a hack saw. If
applicable, re-form straps or install new bend straps. If heat is used on the straps, allow them to cool naturally and
thoroughly before removing the c-clamps.
8. Replace spring on vehicle. Torque to 86-110 ft./lbs.
9. Install the Rough Country block in between the leaf spring and the axle. Jack up the axle and align the pins in the
blocks and axle seat. Secure with new u-bolts and torque evenly to 85 ft/lbs.
10. Locate shock part number 658601 gas shock and assemble poly bushings and sleeve in shock. Using a 18mm
wrench, for the upper, and a 19mm and 15mm wrench for the lower. Install using factory hardware on upper and
lower shock mount
11. Install the tires and wheels
12. Jack up the rear of the vehicle and remove the jack stands. Lower the vehicle to the floor.
Photo 12 Photo 13
31. Install tires and wheels and lower the vehicle to the ground.
32. Line up the track bar with the hole in the new track bar bracket. You may have to start the truck and turn the wheels
in the direction the track bar needs to go to help align the track bar with the hole. Install using the stock track bar
bolt. Tighten bolt.
33. Install the new sway bar links in the factory location with the factory hardware and using a 18mm wrench. See Photo
12.
34. Tighten the radius arm hardware.
35. For vehicles with 2 piece drive shafts, support the driveshaft, using a 15mm socket remove the bolts from the carrier
bearing bracket. Insert the carrier bearing spacer between the bearing bracket and body mount. Reattach the carrier
bearing using the supplied 7/16”x 3 1/4” bolts and washers. Torque to 60 ft/lbs. See Photo 13. Install bracket with
flat part on the stock mount and the taper towards the front.