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Never slide the threads on
the shock rod past the X-ring
seals when it is installed and
compressed by the bottom
cap of the shock. Doing so will
damage the seal and cause
shock oil to leak.
26 • TRX-4 SPORT
ADJUSTING YOUR MODEL
Shock assembly
1. Insert the shock shaft assembly through the
shock body until the piston bottoms out.
2. Lubricate the shaft, O-ring, and X-rings with
silicone oil.
3. Install the O-ring, X-rings and spacer over
the shaft and into the bore of the shock
body.
4. Install the lower cap.
5. Grip the shaft close to the threads with
needlenose pliers or side cutters and
thread the rod end onto the shock shaft
until the rod end bottoms out.
6. Fill the shock with new silicone shock oil
(see the "Replacing Shock Oil" section on the
previous page).
7. Slowly thread the upper cap onto the
shock body.
8. Reinstall the spring and lower retainer.
transmission tuning
Adjusting the Slipper Clutch
The TRX-4 Sport is equipped with an adjustable Torque Control
slipper clutch, which is built into the large spur gear. The purpose
of the slipper clutch is to protect the motor and drivetrain when the
drivetrain is bound while driving. The slipper clutch should not slip
during normal operation.
The slipper clutch is integrated
into the main spur gear on the
transmission. The slipper clutch
is adjusted using the locknut
Loosen
on the slipper shaft. To tighten
or loosen the slipper nut, insert
the 2.0mm hex wrench into the
hole in the end of the slipper
shaft. This locks the shaft for
adjustments.
To restore factory settings, use
the included 4-way wrench
to turn the adjustment nut
until all four spring washers
are flat; then, tighten the nut
an additional 1/16 turn (or
until the slipper clutch does
not allow the spur gear to slip
during normal operation).
WHEELS AND TIRES
Many types of aftermarket tires and wheels can be adapted for
use on your model. Most will affect the overall width and the
suspension geometry of the model. The offsets and dimensions
designed into the model's wheels are intentional; therefore,
Traxxas cannot recommend the use of other non-Traxxas wheels
with different specifications.
When selecting wheels, the inner
diameter of the inside of the
wheels must be 38mm or larger to
accommodate the axle portals. The
TRX-4 Sport's stub axles are 6mm; this
may require drilling the center hole
of the wheel to increase the diameter
before it will fit. When selecting tires,
consider the terrain. Rocky surfaces are
better suited to soft compound tires
with a tight tread pattern. In loose dirt, harder compound tires with
a more open tread pattern should perform better. TRX-4 Sport's 1.9
Canyon Trail tires are optimized for all driving surfaces.
Tighten
Minimum Wheel
Inner Diameter
38mm
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