Rough Country 637 - Manual

JEEP JK 2 1/2” SUSPENSION KIT
Thank you for choosing Rough Country for all 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 kit content list on this page and
the kit layout on the back page. 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 re-
sponsible for any product that is altered.
This system was developed to provide a level stance to the Jeep after it is lifted. You will note that the front lift is 2.5”
and the rear lift is 2”. This is intentional and is the look most often requested. Also you will note that this lift does not
modify the front or rear track bar or its mounting points. This will result in what is generally considered an insignificant
shift in both the front and rear axle of approx 1/4 of an inch. Rough Country offers an optional rear track bar bracket to
address this. Please call your nearest Rough Country dealer to inquire.
This suspension system was developed using a 285/75R17” tire with factory wheels. If bigger/wider tire are used with the
factory wheels or factory offset wheels you must carefully check the clearance during turning between the tires and the
lower control arm and the front sway bar link before driving. If you have any questions concerning the design, function,
and correct use of our products contact us at 800-222-7023.
IMPORTANT NOTES : The draglink must be adjusted to the center steering wheel BEFORE the vehicle is driven.
Failure to do so will cause a computer error in the Jeep’s traction control system.
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 to contact with the automatic transmis-
sion 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 pro-
cedure 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.
Kit Contents:
2— Front Coil Spring Spacers
2— Front Brake Line Brkts
2— Rear Coil Spring Spacers
2— Front Shock Extension
2— Rear Shock Extension
2—Rr Brake Line Ext Brkts
1--Poly Bag Containing:
2-.1/2” X 2 3/4” Bolts
2-1/2” lock washers
4-10mm x 80mm Bolts
4-10mm flat washers
2-Rear spacer retainers
2-12mm nuts
2-12mm x 65mm bolt
2-washers
2-5/16 x 3/4” bolt
2-5/16” nuts
4-5/16” washers
4-1/4” x 1” Bolts
4-1/4” Lock Nuts
8-1/4” Flat washers
92165600 REV1
Rear Spacer Retainers (2)
Rear Shock
Extender
Bracket (2)
Rear Coil Spacer (2)
Front Coil Spacer (2)
Front Shock Bracket(2)
Rear Brake Line Brkts
Front Brake Line Brkts