Trail Master Suspension TM407N FORD F-150 4WD 6 SUSPENSION LIFT KIT - Manual (Page 3)

3
TM407N
Revised
6.14.13
Before Starting Installation
1. Carefully read all warnings and instructions com-
pletely before beginning.
2. Verify all parts have been received in this kit by
checking the parts list at the end of this document.
3. Only install this kit on the vehicle for which it is
specified. If anytime during the installation you en-
counter something different from what is outlined in
the instructions, call technical support at (877) 695-
7812.
4. Special tools needed:
a. Torsion bar tool
b. Welder or access to a professional welding
shop.
c. Die grinder or similar tool capable of cutting
metal.
d. Transmission jack
e. Rust resistant metal paint
5. Park vehicle on a clean, dry, flat, level surface and
block tires so vehicle cannot roll in either direction.
Ride Height
6. Measure ride height with the vehicle supporting its
own weight on level ground. To settle the suspension,
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.
Wheel & Tire Requirements
The factory wheel and tire combination will not fit
once this kit is installed. The following are specifi-
cations for choosing a proper wheel and tire com-
bination:
Minimum wheel diameter = 17” x 8”
Maximum wheel backspacing = 5”
Maximum tire diameter = 315/70R17
Torque Specifications
NOTE
Kit parts are prefaced by the word kit and appear in
bold print.
NOTE
Adhere to recommendations when replacement fas-
teners, retainers and keepers are called out in the fac-
tory service manual. When re-assembling the vehicle it
is recommended by the vehicle manufacturer that cer-
tain fasteners are replaced in order to maintain proper
retention characteristics. This system may not include
all replacement hardware as recommended by the fac-
tory service manual. Additional replacement hardware
should be obtained prior to installation of this system
to meet the requirements of the factory service man-
ual.
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 25
3/8”-16 30 40
3/8”-24 35 45
7/16”-14 50 65
7/16”-20 55 70
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