Rough Country PERF662X - Manual

97-06 JEEP TJ 4”/ 6” X-SERIES SUSPENSION KIT
921661X00
Thank you for choosing Rough Country for your suspension needs.
Rough Country recommends a certified technician to install 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 operating safety of the vehicle.
Please read all the instructions before beginning the installation. Check the kit hardware against the kit contents. 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 needed tools. If you have any questions please call us at 800-222-7023.
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
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. Mixing component brands, lifts, and/or combining body lift with suspension
lifts voids all warranties. 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.
The 4” suspension system was developed for 33x12.50x15 tire on an after market wheel with 3.75” of back spacing,
on an 8” wide wheel. And the 6” kit was developed for a 35x12.50x15 tire. Due to the inconsistency of vehicles
when manufactured and the various options available, the amount of actual lift gained by this lift kit will vary. On
models outfitted with extra bolt-on equipment and accessories, Rough Country offers new coil spring isolator pads
made from polyurethane to boost ride height 3/4". These are available for the front or rear. Part # 7596
With the installation of this kit and larger tires it is highly recommended that an aftermarket stabilizer be added. This
kit assumes the installation of a SYE and a CV drive shaft. If a SYE and a CV driveshaft are not installed a transfer
case drop and a shift control bracket will be required.
This kit features Rough Country’s adjustable joint design. Adjustable end tool is included in kit.
Assemble the joints per the separate instruction sheet Part # 92RCJ120 provided.
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 in-
stallation instructions on to the vehicle owner for review and to be kept in the vehicle for its service life.
• Spring Compressor
• Silicone spray
• 23/64” Drill Bit
• 17/32” Drill Bit
• 29/32” Drill Bit
• Hammer
• 13mm Socket /Wrench
• 15mm Socket / Wrench
• 18mm Socket /Wrench
• 19mm Socket /Wrench
• 21mm Socket / Wrench
• 33mm Socket
TORQUE SPECS:
Size Grade 5 Grade 8
5/16” 15 ft/lbs 20 ft/lbs
3/8” 30 ft/lbs 35 ft/lbs
7/16” 45 ft/lbs 60 ft/lbs
1/2” 65 ft/lbs 90 ft/lbs
9/16” 95 ft/lbs 130 ft/lbs
5/8” 135 ft/lbs 175 ft/lbs
3/4” 185 ft/lbs 280 ft/lbs
10mm 33ft/lbs
50 ft/lbs
12mm 60ft/lbs 85ft/lbs
• 9/16” Wrench
• 1 1/8” Wrench
• 1 1/2” Wrench
• 1 13/16” Wrench
• T40Torx bit
• T55 Torx Bit
• Floor jacks
• Wheel chocks
• 1/2” drill motor
• Torque wrench
• Allen wrenches
• Heavy duty jack stands
TOOLS NEEDED: