Rough Country 479.20 - Manual

05-07 F250 4 1/2” SUSPENSION KIT
92147900
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
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 at all times. Avoid situations where a side rollover may occur.
Braking performance and capa-
bilities are decreased when significantly larger/heaver tires and wheels are used. Take this into consideration while driv-
ing. 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 addi-
tion 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 character-
istics. INSTALLING DEALER—It is your responsibility to install the warning decal and to forward these installation in-
structions 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.
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