Rough Country 479.20 User Manual
92147900
05-07 F250 4 1/2” SUSPENSION KIT
Thank you for choosing Rough Country for your suspension needs.
Rough Country recommends a certified technician installs this system. In addition to these instructions, professional
knowledge of disassemble/reassembly procedures as well as post installation checks must be known. Attempts to install
this system without this knowledge and expertise may jeopardize the integrity and/or operating safety of the vehicle.
Please read all the instructions before beginning the installation. Check the kit hardware against the parts list. Be sure
you have all the needed parts and understand where they go. Also please review the tools needed list and make sure
you have the tools necessary to install this kit.
PRODUCT USE INFORMATION
As a general rule, the taller a vehicle is the easier it will roll. We strongly recommend seat belts and shoulder
harnesses should be worn a t all times. Avoid situations where a side rollover may occur. Braking performance and capabilities are decreased when significantly larger/heaver tires and wheels are used. Take this into consideration while driving. Also, speedometer recalibration is necessary when larger tires are installed.
Do not add, alter, or fabricate any factory or after-market parts which increase vehicle height over the intended height of
the Rough Country product purchased. Rough Country makes no claims regarding lifting devices and excludes any and
all implied claims. We will not be responsible for any product that is altered.
This kit is packaged as a leveling kit—raising the front 4 1/2” and the back 3”. If you desire a different look or if your truck
has a tool box or something else that is going to bring the rear end down, please consult with your sales representative
about options. Due to payload options and initial ride height variation the amount of lift shown is a base figure. Final ride
height may vary slightly.
This 4 1/2” suspension system was developed for 35x12.50x17 tire on an after market wheel with 4.5” of back spacing.
If equipped with factory rear contact overload springs, please note they will need to be removed with the addition of the block included with this kit.
NOTICE TO DEALER AND VECHICLE OWNER
Any vehicle equipped with any Rough country product must have the “Warning to Driver” decal installed on the sun visor
or dash. The decal is to act as a constant reminder for whoever is operating the vehicle of its unique handling characteristics. INSTALLING DEALER—It is your responsibility to install the warning decal and to forward these installation instructions on too the vehicle owner for review and to be kept in the vehicle for its service life.
Part # 1197 carrier bearing drop kit is also offered for vehicles equipped with two piece drive shafts. Ask your
dealer for details.
Tools Needed
8mm Wrench 1 1/8” Wrench
10mm Wrench 12mm Wrench
15mm Wrench Coil Spring Compressor
17mm Wrench 5/8” Wrench
17mm Socket Jack Stand
18mm Wrench Jack
18mm Socket
19mm Wrench
21mm Wrench
24mm Socket
30mm Socket
Torque Specs:
Size Grade 5 Grade 8
5/16” 15 ft/lbs 20 ft/lbs
7/16” 45 ft/lbs 60 ft/lbs
1/2” 65 ft/lbs 90 ft/lbs
5/8” 135 ft/lbs 175 ft/lbs
3/4” 185 ft/lbs 280 ft/lbs
Class 8.8 Class 10.9
8MM 18ft/lbs 23 ft/lbs
FRONT INSTALLATION INSTRUCTIONS
1. Block the rear wheels of the vehicle. Raise the front of the vehicle and support the frame with jack stands. Remove
the front wheels and tires and set aside. Position a hydraulic jack under the front axle and raise the jack until the
front suspension begins to compress.
2. Disconnect the track bar from the driver side frame bracket, using a 30mm wrench.
3. Disconnect the sway bar end links from the axle bracket, using a 21mm wrench. Remove end links See Photo 1.
Retain for reuse.
4. Remove the bump stop from the cup shaped bracket. Remove the bracket from the frame rail. See Photo 2.
Photo 1
Photo 2
Remove
Bump Stop
Remove
Factory Sway
and Bump
Stop Cup
Bar Link
5. Disconnect the ABS sensor wire from the lower spring seat and the radius arm, using a 8mm wrench.
6. Unbolt the brake line brackets from the axle to ensure brake line free play during the suspension system installation
using a 10mm wrench.
7. Remove the center disconnect vacuum lines from the clamp on the axle.( If equipped with automatic hubs).
8. Using a 19mm wrench, remove the nut, retaining washer and rubber bushing from the both upper shock mounts.
Using a 18mm wrench remove the lower shock bolts. Retain hardware for re-use. See Photo 3.
9. Carefully lower the jack until the coil springs are free. Remove the coil springs from the vehicle. Note: use of a coil
spring compressor may be required for spring removal.
10. Remove the ABS line from the retaining tab on the radius arm and carefully pull the plastic clip free from the radius
arm. See Photo 4. This is done to prevent over extending the line during bracket installation.
Photo 3
Photo 4
Front Upper
Shock Mount
Radius Arm
ABS Line
Mount
11. Using a 1 1/8” wrench, and socket remove the bolt holding the radius arm to the frame. See Photo 5.
12. Using a 24mm wrench, and socket loosen the bolt holding the radius arm to the axle. See Photo 6.
Photo 5 Photo 6
Passenger
Radius Arm
Frame Mount
Passenger
Radius Arm
Axle Mount
13. Insert the radius arm drop bracket into the stock location. See Photo 7.
14. Insert the supplied crush sleeves in the bracket as shown in Photo 8 and secure using the supplied 3/4” x 5” bolts,
washers & nuts. Tighten using a 1 1/8” wrench & socket .(2 Per side).
Photo 7
Photo 8
Radius Arm
Frame Mount
Bracket Crush
Sleeve
Passenger
Radius Arm
Frame Mount
Bracket
15. Using a measuring tape, mark 3/4” from the end of the factory radius arm as shown and trim using a reciprocating
saw. This area is trimmed for clearance on the crush sleeve. See Photo 9
16. Reinstall the stock radius arm in the drop bracket in the lower hole with the stock hardware. See Photo 10. Leave
loose. Both radius arm bolts will be torqued with the weight of the vehicle on the axle.
17. Reattach the ABS wire to the radius arm.
18. Repeat step 3-15 on the opposite side.
19. Using a 21mm wrench and 19mm wrench & socket remove the factory track bar bracket. Retain stock hardware for
re-use.
Photo 9
Photo 10
20. Position the Rough Country track bar bracket on the frame in the same position as the original and secure using the
factory hardware. Tighten all 5 mounting bolts to 129 ft/lbs. See Photo 11.
21. Using the nylon bump stop extension provided, place the extension between the frame and the bump stop cup. Bolt
back into the original location using the 8mmx95mm bolt
supplied. Torque to 15 ft. lbs.
22. Lower the front axle enough to install the new coil
springs. Position the coil springs in the lower coil mounts
on the axle and rotate as necessary to be sure that the
pigtail of the coil in indexed properly in the bucket. Position the factory rubber isolator on top of each coil, then
raise the axle enough to seat the coil springs in the upper spring buckets.
Radius Arm
Frame Mount
Bracket with
Radius Arm
Reinstalled
Photo 11
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