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To achieve a good starting
point for the slipper clutch
in this model, remove the
slipper gear assembly from
your model (see page 26 for
instructions) and tighten
the slipper clutch adjusting
nut clockwise until the
slipper clutch adjusting
spring fully collapses (do
not over tighten), and then
turn the slipper clutch nut
counterclockwise one full
turn.
Do not run your model with
the slipper clutch adjusting
spring fully compressed. The
minimum recommended
slipper clutch setting is 1/2
turn counterclockwise from
fully compressed.
24 • SLASH 4X4 ULTIMATE
BASIC TUNING ADJUSTMENTS
the right side, R on the left side) to provide 1° of toe-in.
Slash 4x4 Ultimate can also use plastic rear stub axle carriers (part
#1952, sold separately), which offer 2.5° of toe-in. They can be
installed on either side of the truck, as they are not left/right specific.
In general, increasing toe-in improves stability, while reducing toe-in
may help "loosen up" the truck's handling to improve corner speed,
especially on high-grip tracks. Experiment to see what works best
for your track and driving style.
SHOCK MOUNTING
POSITIONS
Big bumps and rough terrain
require a softer suspension
with the maximum possible
suspension travel and ride
height. Racing on a prepared
track or on-road use requires
a lower ride height and firmer,
more progressive suspension
settings. The more progressive
suspension settings help
reduce body roll (increased roll
stiffness), dive during braking, and squat during acceleration.
The suspension of your model has been set up for off-road
performance (position 2 on the front suspension arms and position
3 on the rear suspension arms). If you plan on driving on hard
surfaces the following changes should be made:
1. Move the front shocks to position 3 on the suspension arms.
2. Move the rear shocks to position 4 or 5 on the suspension arms.
3. Reduce the ride height by loosening the upper spring
pre-load spacer.
4. Position 1 is not recommended for front or rear.
CENTERING YOUR SERVO
If you have removed the servo horn from your model's steering servo,
or the servo has been removed for service or cleaning, the servo must
be re-centered prior to installation of the servo horn or installation of
the servo in the model.
1. Remove the front module from the vehicle to access the
steering servo.
2. Connect the steering servo to channel 1 on the receiver. Connect
the electronic speed control (ESC) to channel 2. The white wire on
the servo lead is positioned towards the receiver's LED.
3. Turn the transmitter power switch on. Make certain the
transmitter's batteries are not depleted.
4. Turn off TSM (see page 17).
5. Turn the transmitter's steering trim knob to the center "0" position.
6. Disconnect motor wires "A" and "C" (see page 12) to prevent the
motor from turning during the next steps. Connect a fresh battery
pack to the speed control and turn on the ESC (see page 18). The
servo's output shaft will automatically jump to its center position.
7. Install the servo horn onto the servo
output shaft. The servo horn should
be aligned one spline clockwise from
perpendicular alignment with the
servo case (not the chassis).
8. Check servo operation by turning
the steering wheel back and forth to
ensure that the mechanism has been centered properly and you
have equal throw in both directions. Use the transmitter's steering
trim knob to fine-tune the position of the servo horn so the model
tracks straight when the steering wheel is at neutral.
ADJUSTING THE SLIPPER CLUTCH
The model is equipped with an adjustable slipper clutch, which is
built into the large spur gear. The purpose of the slipper clutch is to
regulate the amount of power sent to the wheels to prevent tire spin.
When it slips, the slipper clutch makes a high-pitch, whining noise. To
adjust the slipper, remove the slipper gear assembly from your model
(see page 26 for instructions), and turn the adjusting nut clockwise to
tighten or counterclockwise to loosen. Adjust the slipper so that you
can hear it slip for a moment from a standing, full throttle start. (Learn
more about adjusting the slipper clutch in the sidebar.)
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