Tuff Country 13085 User Manual
Part # 13085
2011 - 2013 Chevy / GMC 2500HD / 3500HD
without contact overloads
3.5” suspension system
Part
# Description
Qty.
13085-01 DS & PS Upper control arm 2
13085-02 DS & PS Front upper shock bracket 2
12904-03 Torsion bar key 2
5U-3431412S 3/4” x 3 1/4” x 12” square u-bolt 4
34NW Hardware bag 1
BL101 Rear lifted block 2
13085NB Hardware bag 1
13085NB1 Hardware bag 1
1308INST Instruction manual 2
MIRRORHANGER Rear view mirror hanger 1
WARNINGDECAL Warning decal 1
Congratulations on your selection to purchase a Tuff
Country EZ-Ride Suspension System. We at Tuff
Country EZ-Ride Suspension are proud to offer a high
quality product at the industries most competitive pricing. Thank you for your confidence in us and our product.
If you desire to return your vehicle to stock, it is the
customers responsibility to save all stock hardware
and components.
The Tuff Country EZ-Ride Suspension product safety
label that is included in your kit box must be installed
inside the cab in plain view of all occupants.
Special note: Before installation begins, it is the
customers/installers responsibility to make sure that
all parts are on hand. If any parts are missing, please
feel free to call one of our customer service representatives @ (801) 280-2777.
Installation manual
3.5” suspension system
2011 - 2013 Chevy / GMC
2500HD / 3500HD
Without contact overloads
Part # 13085
sj08152013rev.02
Important customer information:
Tuff Country EZ-Ride Suspension highly recommends
that a qualified or a certified mechanic performs this
installation.
It is the responsibility of the customer/installer to wear
safety glasses at all times when performing this installation.
It is the customers/installers responsibility to read and
understand all steps before installation begins. If you
have any questions or concerns, please contact our
technical department @ (801) 280-2777. Also, the OEM
manual should be used as a reference guide.
This vehicles reaction and handling characteristics
may differ from standard cars and/or trucks.
Modifications to improve and/or enhance off road performance may raise the intended center of gravity.
Extreme caution must be utilized when encountering
driving conditions which may cause vehicle imbalance
or loss of control. DRIVE SAFELY! Avoid abrupt
maneuvers: such as sudden sharp turns which could
cause a roll over, resulting in serious injury or death.
It is the customers responsibility to make sure that a
re-torque is performed on all hardware associated with
this suspension system after the first 100 miles of
installation. It is also the customers responsibility to
do a complete re-torque after every 3000 miles or after
every off road use.
After the original installation, Tuff Country EZ-Ride
Suspension also recommends having the alignment
checked every 6 months to ensure proper tracking,
proper wear on tires and front end components. Tuff
Country EZ-Ride Suspension takes no responsibility
for abuse, improper installation or improper suspension maintenance.
Limited lifetime warranty
Notice to all Tuff Country EZ-Ride Suspension
customers: It is your responsibility to keep your
original sales receipt! If failure should occur on any
Tuff Country EZ-Ride Suspension component, your
original sales receipt must accompany the warranted
unit to receive warranty. Warranty will be void if the
customer can not provide the original sales receipt. Do
not install a body lift in conjunction with a suspension
system. If a body lift is used in conjunction with any
Tuff Country EZ-Ride Suspension product, your Tuff
Country EZ-Ride Suspension WARRANTY WILL BE
VOID. Tuff Country Inc. (“Tuff Country” ) suspension
products are warranted to be free from defects in
material and workmanship for life if purchased,
installed and maintained on a non-commercial vehicle;
otherwise, for a period of twelve (12) months, from the
date of purchase and installation on a commercial
vehicle, or twelve thousand (12,000) miles (which ever
occurs first). Tuff Country does not warrant or make
any representations concerning Tuff Country Products
when not installed and used strictly in accordance
with the manufacturer’s instructions for such
installation and operation and accordance with good
installation and maintenance practices of the
automotive industry. This warranty does not apply to
the cosmetic finish of Tuff Country products nor to
Tuff Country products which have been altered,
improperly installed, maintained, used or repaired, or
damaged by accident, negligence, misuse or racing.
(“Racing is used in its broadest sense, and, for
example, without regards to formalities in relation to
prizes, competition, etc.) This warranty is void if the
product is removed from the original vehicle and
re-installed on that or any other vehicle. This warranty
is exclusive and is in lieu of any implied warranty of
merchantability, fitness for a particular purpose or
other warranty of quality, whether express or implied,
except the warranty of title. All implied warranties are
limited to the duration of this warranty. The remedies
set forth in this warranty are exclusive. This warranty
excludes all labor charges or other incidental of
consequential damages. Any part or product returned
for warranty claim must be returned through the
dealer of the distributor from whom it was purchased.
Tuff Country reserves the right to examine all parts
returned to it for warranty claim to determine whether
or not any such part has failed because of defect in
material or workmanship. The obligation of Tuff
Country under this warranty shall be limited to
repairing, replacing or crediting, at its option, any part
or product found to be so defective. Regardless of
whether any part is repaired, replaced or credited
under this warranty, shipping and/or transportation
charges on the return of such product must be prepaid
by the customer under this warranty.
Important information that needs to be read before
installation begins:
Tuff Country recommends a 33” x 12.50” tire with a
wheel that has a back spacing of 5.5” or less. The
stock tires and wheels can be used in conjunction with
this lift kit. If a wider tire is installed on the stock
wheel, contact with the upper control arm will occur,
and is not recommended.
Tuff Country EZ-Ride Suspension packages (2) sets of
instruction sheets with this box kit. (1) is for the
installer and (1) is for the customer. The (1) for the
customer has some post installation procedure
literature and it is the installers responsibility to make
sure that the customer receives a copy of the
installation manual along with the literature.
The OE front shocks will not be long enough once this
suspension system has been installed but Tuff
Country includes a shock relocation bracket for the
front shocks. Also, the rear shocks will work once this
suspension system has been installed but Tuff
Country highly recommends replacing the rear
shocks. If you have not already ordered your rear
shocks, please contact Tuff Country or your local Tuff
Country dealer and order your new rear shocks. Tuff
Country recommends install a 30” fully extended nitrogen gas shock.
Before installation begins, Tuff Country EZ-Ride
Suspension highly recommends that the installer
performs a test drive on the vehicle. During the test
drive, check to see if there are any uncommon sounds
or vibrations. If uncommon sounds or vibrations occur
on the test drive, uncommon sounds or vibrations will
be enhanced once the suspension system has been
installed. Tuff Country EZ-Ride Suspension highly
recommends notifying the customer prior to installation to inform the customer of these issues if they
exist.
Make sure to use loctite on all new and stock hardware
associated with the installation of this suspension
system.
Recommended tools selection:
Torque wrench
Standard socket set
Standard wrench set
Metric socket set
Metric wrench set
Tape measure
Hydraulic floor jacks
Torsion bar removal tool
Hardware bag 13085NB includes:
Description
Quantity
123B (1/2” x 3” bolt) 4
716WA (7/16” USS flat washer) 4
12UN (1/2” unitorque nut) 4
S10237 (.750” x .625” x 2.250” sleeve) 4
9165B (9/16” x 5” bolt) 4
12WA (1/2” USS flat washer) 8
916UN (9/16” unitorque nut) 4
Hardware bag 13085NB1 includes:
Description
Quantity
SERT04 (sert fitting) 4
S10238 (.850” x .630” x 2.560 sleeve) 4
MO2617 (poly bushing) 8
Hardware bag 34NW includes:
Description
Quantity
34HN (3/4” u-bolt high nut) 8
SUW-34 (3/4” u-nolt washer) 8
Please follow instructions carefully:
Before installation begins, measure from the center of
the hub, to the bottom of the fender well, and record
measurements below.
Pre-installation measurements:
Driver side front:_________________________________
Passenger side front:_____________________________
Driver side rear:__________________________________
Passenger side rear:______________________________
At the end of the installation take the same
measurements and compare to the pre-installation
measurements.
Post-installation measurements:
Driver side front:_________________________________
Passenger side front:_____________________________
Driver side rear:_________________________________
Passenger side rear:______________________________
Front end installation:
1. To begin installation, block the rear tires of the vehicle so
that the vehicle is stable and can’t roll backwards. Safely lift
the front of the vehicle and support both the driver and passenger side with jack stands. Remove the tires and wheels
from both the driver and passenger side.
2. Remove the lower skid plate from the OE location. Save
the lower skid plate and hardware for later re-installation.
3. Place a pair of hydraulic floor jacks under the front differential. Place one on the driver side and one on the passenger side.
4. Working on the front differential, remove the hardware
attaching all (4) mounting points of the differential the OE
mounts. The OE hardware may be discarded.
5. Carefully lower down on the hydraulic floor jacks holding
the front differential allowing enough room for the new differential spacers to be installed.
6. Locate (4) S10237 sleeves, (4) 9/16” x 5” bolts, (8) 1/2”
USS flat washers and (4) 9/16” unitorque nuts from hardware bag 13085NB. Install the new differential spacer
sleeves between the front differential and the OE mounts
and secure using the new 9/16” hardware. Make sure to use
loctite and torque to 85 ft lbs. Carefully remove the hydraulic
floor jacks holding the front differential.
7. Working on the driver side, scribe a mark on the torsion
bar and the lower control arm. Special note: This is done
so that the torsion bar can be put back into the same
location on the lower control arm once the new torsion
bar key has been installed. Repeat procedure on the pas-
senger side.
8. Working on the driver side and using a proper torsion bar
removal tool. Special note: Tuff Country EZ-RIde
Suspension requires that a proper torsion bar unloading
tool be used when performing this installation. If you do
not have one, please contact your local GM dealer to
purchase one from them. Carefully remove the stock tor-
sion bar bolt and block. Set the stock torsion bar bolt and
block aside. Repeat procedure on the passenger side.
9. Working on the driver side, carefully tap the torsion bar
forward until the torsion bar key can be removed. Remove
and discard the torsion bar key. Repeat procedure on the
passenger side.
10. Working on the driver side, remove the upper shock
hardware holding the shock into the upper mounting location. The hardware may be discarded. Remove the lower
shock hardware holding the shock to the lower control arm.
Save the lower hardware and shock. Repeat procedure on
the passenger side.
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