Rough Country 674X User Manual
JEEP JK 4” X-SERIES SUSPENSION KIT
Thank you for choosing Rough Country for your suspension needs.
Rough Country recommends a certified technician 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 integrity and/or operating safety of the vehicle.
Please read instructions before beginning installation. Check the kit hardware against the parts list. Be sure you have all
needed parts and know where they go. Also please review tools needed list and make sure you have needed tools.
As a general rule, the taller a vehicle is, the easier it will roll. Seat belts and shoulder harnesses should be worn at all
times. Avoid situations where a side rollover may occur. 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 4” suspension system was developed using a 35X12.50X17 tire with 4.5” to 4.75” of back spacing on aftermarket
wheels. Stock wheels can be used with this kit with up to a 35x12.5 tire, but different tire manufactures designs may result in a tire width that could result in contact with the lower control arm and/or front sway bar link in a sharp turn. Please
consult with your tire and wheel expert before purchasing. Also note that if wider tires are desired, offset wheels will be
required.
If question exist we will be happy to answer any questions concerning the design, function, and correct use of our products by calling 1-800-222-7023.
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.
IMPORTANT NOTES : Upon completing the install of this kit the draglink must be adjusted to center the steering
wheel BEFORE
formance.
On Automatic equipped vehicles; due to use of an oversize driveshaft from the factory and inadequate
factory clearance it may be possible for the front driveshaft to come in contact with the automatic transmission
pan tearing the factory boot and rubbing on the shaft. Generally this occurs during heavy articulation when
front sway bar links are disconnected and longer shocks are installed. If this is found to occur, the proper procedure would be to replace the oversize factory shaft with an aftermarket smaller diameter shaft to increase
clearance between the transmission and front driveshaft. Rough Country does offer this driveshaft if needed.
Additionally on 2012 Models, additional exhaust modification on the passenger side crossover pipe will
be required for adequate clearance on the front driveshaft.
Any vehicle equipped with any Rough Country product should have a “Warning to Driver” decal installed on the inside of
the windshield or on the vehicle’s dash. The decal should 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 forward these installation instructions on
to the vehicle owner for review. These instructions should be kept in the vehicle for its service
10mm Wrench 21mm Socket Jack
21mm Wrench Jack Stand Grinder
18mm Wrench 7/16” Wrench 13/32” Drill Bit
18mm Socket 9/16” Wrench Drill
19mm Wrench 9/16” Socket 19mmDeepWell Socket
Reciprocating Saw 13/16” Socket 7/8” Wrench
5/8” Wrench
the vehicle is driven. Failure to do so will cause a computer error, odd handling, and poor per-
NOTICE TO DEALER AND VEHICLE OWNER
PRODUCT USE INFORMATION
Tools Needed:
KIT CONTENTS
Kit Box 1681X OR
1682X
Qty Part # Description
2 94506400 Rear sway bar links
1 1681Bag3 Rear Sway Bar Link Bag
1 1681XBag1 Kit bag
1 94004009 Rear track bar brkt brace
1 94004003 Rear track bar bracket
2 94004075 Rear Coil shims
For 4 Door Applications
2 91924206 Front coil spring 4 door
2 91924306 Rear coil spring 4 door
For 2 Door Applications
2 91924606 Front coil spring 2 door
2 91924706 Rear coil spring 2 door
1673X
2 94001144 Fr Upper Adj Arm
2 94001135 Fr Lower Adj Arm
2 94001136 Rr Lower Adj Arm
1 94001137 Dr Rr Upper Adj Arm
1 94001138 Pass Rr Upper Adj Arm
1 1673XBag2 Inst sheet ba g
1673X Kit Bag3
4 94001084 Spring Clips
4 94001083 Brake Line L bracket
8 10MMCW Brake Line Washers
1681X Bag1
Qty Part # Description
1 411001 Track bar bracket sleeve
1 90504725 10mm x 80mm Frt Upr
Control Arm Bolt
1 81026 10mm Lock nut
3 81078 .375-16 Flange Lock Nut
3 90500304 .375 washer
4 81079 Cross-member washer
3 90500316 .375-16 x 1” bolt
1 90500318 14mm X 75mm Bolt
1 90500319 14mm x 80mm Bolt
2 90500332 14mm Nylock nut
Shock Bag in Shock Box
Qty Part # Description
4 403646 Shock sleeve
FR Sway Bar Link Bag
2 90500254 1/2” Lock Nut
1 1673XBag3 Brake Line Hardware bag
4 Driver & Pass Fr and Rr
Brake Lines
1 1149Bag Fr Sway Bar Link Bag
RCX 2.2 Shock Box
2 660585 Front RCX 2.2 shocks
2 660586 Rear RCX 2.2 shocks
1 1681Bag2 Shock Bag
4 90500268 5/16” x 1” Self Tap
2 94001062 Hitch Pin
2 81052 1/2” Flat Washer
2 94000955 Disconnect Pin
2 90504750 12mm Flange Lock nut
2 90500377 12mm jam Nut
2 ESMR-12 Sway Bar Link Rod End
KIT CONTENT
Rear Coil Shims (2)
Fr Brake Lines
Rr Lwr Control Arms
Rear Coil Springs
Rear Performance 2.2 Shocks
Rr Upr Control Arms
Rr Track Bar Brckt
Rr Sway Bar Links
Rr Brake Lines
Front Coil Springs
Front Performance 2.2 Shocks
Fr Sway Bar
Disconnects
Fr Upr Control Arms
Rr Lwr Control Arms
Fr Adj Track Rod
TORQUE SPECIFICATIONS
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
Metric (Grade) 8.8 10.9 12.9
14MM 85ft/lbs 120ft/lb. 145ft/lbs
FRONT INSTALLATION INSTRUCTIONS
1. Prior to installing this kit, with the vehicle on the ground, measure the heights of your vehicle. This measurement can
be recorded from the center of the wheel straight up to the top of the inner fender lip. Record the measurements.
LF:__________ ,RF:___________,
LR:__________, RR:___________
2. Place vehicle in park and chock the rear wheels. Raise the front of the vehicle with a jack and secure a jack stand
beneath each frame rail behind the front control arms. Ease the frame down onto the stands.
3. Remove the front tires/wheels
, using a 19mm deep well socket.
4. Using a 21mm socket, remove bolt securing the front track bar to the frame. Retain stock hardware. See Photo 1.
5. Using a 18mm socket and wrench remove the bottom sway bar bolts. Using a 19mm socket and 18mm wrench, remove the top of the sway bar link. Retain hardware for later use. See Photo 2.
PHOTO 1 PHOTO 2
Remove the track rod from the frame Remove the front sway bar links
6. Remove the lower shock bolt using a 18mm socket and wrench. Using a 5/8” wrench unbolt the top of the shoc k and
remove. See Photo 3. Retain the lower stock hardware.
7. Using a 21mm socket and wrench loosen the lower control arm bolts and a 18mm for the upper arms at the axle and
frame, but do not remove.
8. On some models it will be necessary to remove the brake line bracket from the frame to allow the coils to be removed. Using a 10MM socket, remove the brake line bracket from the stock location.
9. Push down on the axle to allow room for the coils to be removed. Remove stock coil springs. Retain coil isolators.
10. Using a 21mm wrench, remove the bolts that secure the lower link arms to the axle.
11. Assemble the lower control arms with the adjustable end & adjust the arm to a length of 22 7/8” from cente r of hole
to center of hole and tighten the jam nut using a 1 7/8” wrench. Install the adjustable end in the frame mount and the
other end in the axle mount. Do not tighten arms in the mounts at this time. See Photo 4. The bend on the lower
control arm should be facing inward to allow for the tires to achieve full lock to lock turning.
PHOTO 3
PHOTO 4
Remove the front shock absorbers Install new lower control arms
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