Tire & wheel information – Trail Master Suspension TM403N FORD F-150 4WD SUSPENSION LIFT KIT User Manual

Page 3

TM403N

Revised

12.5.13

Before Starting Installation

1. Carefully read all warnings and instructions

completely before beginning.

2. Verify all parts have been received in this kit by

checking the parts list at the end of this docu-

ment.

3. Only install this kit on the vehicle for which

it is specified. If anytime during the installation

you encounter something different from what is

outlined in the instructions, call technical support

at (877) 695-7812.

4. Park vehicle on a clean, dry, flat, level surface

and block tires so vehicle cannot roll in either di-

rection.

5. Measure ride height with the vehicle supporting

its own weight on level ground. To settle the sus-

pension, the vehicle should be driven forward at

least 10 feet immediately prior to taking these

measurements. Ride height is the measurement

from the center of the axle straight up (vertical) to

the fender lip. Record this measurement for all

four wheels.

Engine Compartment

1. Disconnect both battery cables. Disconnect
negative cable first, then positive cable.

Wheel & Tire Requirements
Stock 17” & 18” wheels will not work in conjunc-
tion with this kit.

Fits 2011-UP w/ Electric steering rack.

Torque Specifications:

See factory service manual for torque values
when reusing OE fasteners.

NOTE

Adhere to recommendations when replacement fas-
teners, retainers and keepers are called out in the
factory service manual. When re-assembling the ve-
hicle it is recommended by the vehicle manufacturer
that certain fasteners are replaced in order to main-
tain proper retention characteristics. This system
may not include all replacement hardware as recom-
mended by the factory service manual. Additional
replacement hardware should be obtained prior to
installation of this system to meet the requirements
of the factory service manual.

NOTE

Kit parts are prefaced by the word kit and appear in
bold print.

Tire & Wheel Information:

Due to differences in manufacturing,
dimensions and inflated measurements, tire
and wheel combinations should be test fit prior
to installation. Tire and wheel choice is crucial
in assuring proper fit, performance, and the
safety of your Trail Master equipped vehicle.
For this application, 18” and larger wheel not to
exceed 9” in width with a maximum
backspacing of 5 1/2” is acceptable. A quality
tire of radial design, not exceeding 35” tall X
13.5” wide is recommended. Please note that
the use of a 35” X 13.5” tire may require fender
modification. Violation of these
recommendations will not be endorsed as
acceptable by Trail Master Suspension and will
void any and all warranties either written or
implied.

See factory service manual for torque values when re-using

OE fasteners.

Bolt Size

Grade 5 (ft.-lbs.)

Grade 8 (ft.-lbs.)

1/4”-20 10 10

1/4”-28 10 12.5

5/16”-18 17 22.5

5/16”-24 20

3/8”-16 30 40

3/8”-24 35 45

7/16”-14 50

7/16”-20 55

1/2”-13 75 100

1/2”-20 80 115

9/16”-12 105

135

9/16”-18 115

150

5/8”-11 150 195

5/8”-18 160 210

3/4”-16 175 225