Rough Country 620N2 User Manual
92162N2.000
4” Jeep YJ Suspension Lift
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 disassembly and 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 the instructions before beginning the installation. Check the kit hardware against the Kit Contents shown on
page 7. Be sure you have all needed parts and know where they go. If there are any questions about the installation or
installation steps call our tech line at 800-222-7023.
With the installation of all lift kits and larger tires it is important to check the condition of your steering stabilizer. If the
stabilizer is worn or is leaking it should be replaced. Steering stabilizers are designed to restrain “bump steer” and frontend vibration, giving added life to tires, ball joints, and other steering components. A large bore off-road stabilizer kit is
highly recommended for vehicles equipped with larger tires, please contact your Rough Country distributor for details on
purchasing this Part #87317.
PRODUCT USE INFORMATION
As a general rule, the taller a vehicle is, the easier it will roll. Offset, as much as possible, what is lost in rollover resistance by increasing tire track width. In other words, go "wide" as you go "tall". Many sportsmen remove their mud tires
after hunting season and install ones more appropriate for street driving; always use as wide a tire and wheel combination as possible to enhance vehicle stability.
Seat belts and shoulder harnesses should be worn at all times. Avoid situations where a side rollover may occur. Generally, braking performance and capability are decreased when significantly larger/heavier tires and wheels are used. Take
this into consideration while driving.
Do not add, alter, or fabricate any factory or after-market parts to increase vehicle height over the intended height of the
Rough Country product purchased. Mixing component brands is not recommended. 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 suspension system was developed using a 33x12.5 tire on a 15” x 8” wheel with 3.75” of backspacing. If the use of
factory wheels is desired the maximum tire size that can be used is a 33” x 10.5”.
If you have any questions concerning the design, function, and/or correct use of our products please contact one of our
customer service representatives us at 800-222-7023.
NOTICE TO DEALER AND VEHICLE OWNER
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 oper-
ating 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 life.
IMPORTANT PRE—INSTALLATION INSTRUCTIONS
Prior to beginning this installation it is always good to use a penetrating oil and spray all fasteners that will be removed.
Typically the spring eye bolts and the pitman arm are difficult to remove without having done this step. Rough Country
does offer a replacement spring bolt kit to replace all leaf spring mounting bolts, Part #1184 that is highly recommended
and something that should be considered before proceeding.
Frt and Rr Brake
Line Brkts
KIT CONTENTS
Rear Springs (2)
Rr Track Bar Brkt
Rear U-Bolts
Fr Sway bar Links (2)
Front Shocks (2)
Front springs (2)
Kit Includes:
8010-Fr Springs
8011-Rr Springs
1620 Kit Box Contains:
6-1/2” x 2 3/4” x 6 1/4” U-bolts
2-1/2” x 3 1/4” x 6 3/4” U-bolts
1-Front Track Bar Bracket
1-Rear Track Bar Bracket
2-Front Sway Bar Links
2-Transfer Case Drop Spacers
4-Bump Stop Brackets
1-Pitman Arm
2-Front Brake Line Brackets
1-Rear Brake Line Bracket
2-Front N2.0 Shock Absorbers
2-Rear N2.0 Shock Absorbers
2-1/2” U-Bolt Bags
8-1/2” Nuts
8-1/2” Washers
1 -
1620Bag1: Kit Hardware
1 -1620Bag2: - Kit Hardware
1—7593 Kit Bag
For Transfer Case Drop Brackets
6-9/16” x 3”Conical Bolts
Transfer Case Drop Brkt (2)
Front U-Bolts
Fr Trk Bar Brkt
Kit Hardware Breakdown:
1620Bag1:
For Rear Brake Line Bracket
1-5/16” x 1” Bolt
1-5/16” Washers
1-5/16” Nut
For Front Sway Bar Links
2-12mm x 65mm Bolts
2-Flat Washers
2-12mm Flange Lock Nut
2-Upper Sleeves
For Front Brake Line Brackets
2-5/16” x 1” Bolts
2-5/16” Washers
2-5/16” Nuts
For Pitman Arm
1-Cotter Pin
For Front Track Bar Bracket
1-12mm x 65mm Bolt
1-Flat Washer
2-12mm Flange Lock Nut
1-12mm x 50mm Bolt
1-3/8” x 1 1/4” Bolt
1-3/8” Flat Washer
1-3/8” Flange Lock Nut
Pitman Arm
Bump Stop
Spacers
Rear Shocks (2)
Transfer-Case Caps
For Rear Track Bar Bracket
1-12mmx 65mm Bolt
1-12mm Flange Lock Nut
1-Crush Sleeve
1-3/8” x 1” Bolt
1-3/8’ Flat Washer
1-3/8” Flange Lock Nut
1620Bag2:
For Fr and Rear Shocks
4-Shock Sleeves
4-Stud Bushings
4-Cup Washers
2-Stud Nuts
2-Upper Rr Mount Flat Washers
INSTALLATION INSTRUCTIONS
1. Raise the front of the vehicle and support with safety stands under the frame rails. Take care not to over extend the
stock brake lines.
2. Remove the front wheels and tires. Remove front stock shocks. Retain the lower shock hardware for reuse.
3. Support the front axle housing with a floor jack (you must have stands under frame supporting vehicle weight).
4. Remove the stock sway bar links from the sway bar and the spring pads. It may be necessary to tap the upper link
on the sway bar with a hammer to release the tapered pin. See Photo 1.
5. Unbolt track bar from the axle mount on the passenger side of the front axle as shown in Photo 2 and then tie the
bar up and out of the way.
Photo 1
Photo 2
6. Remove the stock brake hose bracket from the top of the frame rail by removing the one bolt located directly behind
the shock towers. (Access can be gained through the engine compartment). Retain the factory torx head bolt for reuse.
7. Remove the four front spring to axle u-bolts. See Photo 3. (The remainder of the spring removal and installation is
performed one side at a time.)
8. On the driver side position a floor jack under the axle tube, just inside of the leaf spring. Raise the jack until the axle
just separates from the spring. Now remove the frame bolts and the shackle bolts on the leaf spring. Retain hardware for reuse. See Photo 4. Remove the stock spring.
Photo 3
9. Repeat on the other side.
10. Loosely attach the spring (front spring part number is
8010) to its hangers with the stock bolts, washers & nuts
(unless optional spring bolt package 1184 was purchased). Note that small spring eye goes to shackle end.
Snug up but do not completely tighten. Make sure
spring tie bolt heads align and seat into spring perch
holes.
11. While installing new u-bolts, place the bump stop extension brackets on top of the axle tubes. See Photo 5.
(The bump-stops are captured by the u-bolts). Tighten ubolts to 65 ft. lbs. of torque. Tighten spring pivot bolts to
35ft. lbs. on both frame mounts and shackle mounts.
Photo 4
Photo 5
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