46 • TRAXXAS TRX-4
Operating Your Model
Note: Return the transmitter’s trigger to neutral and push up again
to activate reverse throttle unless the ESC is in Crawl Mode
(see the
“Selecting a Throttle Mode” section for additional information).
If the model becomes stuck against an object, do not continue to
run the motor. Remove the obstruction before continuing.
Do not push or pull objects with the model.
Shifting the High-Low Transmission
TRX-4’s High-Low Transmission is operated via the red rocker switch on
the transmitter grip.
Shifting from low gear into high gear can be performed at any speed.
For smoother operation, reduce the speed of the model before
shifting from high gear into low gear.
Operating the T-Lock Differentials
The switch on top of the transmitter operates the front and rear
differential locking mechanism. The differentials can be locked or
unlocked at any time during most driving conditions. If the model
is stuck and there is wheelspin on a single wheel (one side of an
unlocked differential is freewheeling), then release the throttle and
allow the wheels to stop before locking the differential. Apply throttle
slowly until the differentials fully engage or disengage.
Transmitter Adjustments
Throttle Neutral Position
The trigger is set to 50/50 for equal movement in the throttle direction
and reverse/brake direction. Changing the setting to 70/30 will increase
the range of forward trigger travel and decrease brake trigger travel.
Note:
You will need to reprogram your electronic speed control to recognize
the 70/30 setting. The default 50/50 setting is recommended.
Steering Trim
Turn the steering trim knob to precisely set
the steering neutral point. To adjust, drive
the vehicle forward slowly while “steering”
with the trim knob until the vehicle travels in
a straight line with no steering input.
Cruise Control
The TRX-4 is equipped with cruise control,
which maintains vehicle speed for more
comfortable long-distance travel (such
as hiking on trails). To operate the cruise
control, accelerate to your desired speed and press the SET button
on the transmitter to lock the speed in. Your model will continue
at the set speed until you apply the brakes. You can fine tune the
speed to exactly match your pace by adjusting the multi-function
knob on the transmitter. Turn the knob clockwise to increase speed,
counterclockwise to reduce speed. You can accelerate and drive
faster with the cruise control set, and the vehicle will resume the set
speed when the throttle is released (
Resume function
).
The TQi transmitter has additional tuning features that can be accessed
by the MENU and SET buttons. For details, download the complete
manual by following the link on the cover of this manual, or by scanning
the QR code.
Electronic Speed Control Adjustments
ATTENTION: USING LiPo BATTERIES
When you turn your model on, the speed control’s status LED is
green, indicating that
Low-Voltage Detection is activated
to prevent over-
discharging of LiPo batteries.
LiPo batteries are intended only for the
most advanced users that are educated on the risks associated with LiPo
battery use.
For NiMH battery users, follow these steps to
disable Low-Voltage Detection:
1. Turn the model on. Make sure the LED
on the speed control is on and green.
2. Press and hold the EZ-Set button for ten
seconds. The LED will turn off and then light red,
and the motor will beep three times.
Release the button.
3. Low-Voltage Detection is now DISABLED.
Switch rearward
= both differentials unlocked. Best handling
and steering performance (smaller turning radius). This is the
best setting for most of your driving.
Switch centered
= front differential locked. Enhanced climbing
ability and traction as both front tires work to pull the vehicle
forward. This is helpful for steep inclines. Turning radius will be
decreased. Reduced steering performance.
Switch forward
= both differentials locked. Maximum climbing
ability and traction. Reduced steering performance. On surfaces
with good traction, it is normal for the truck to appear to
alternately bind and slip the tires when attempting tight turns with
the differentials fully locked.
Locked differentials can be used at any time, but unlocking
the differentials greatly improves vehicle handling during
high-speed driving.
B
3 beeps: LED shines red
A
Green LED: Hold 10 seconds
WARNING: FIRE HAZARD!
Do not use LiPo batteries in this vehicle with
Low-Voltage Detection disabled.
Depress the lower part of the switch to engage High
(for
greater speed).
Depress the upper part of the switch to engage Low
(for greater climbing torque).
Forward
Neutral
(full brake in
Crawl Mode)
Brake/Reverse
(no brake in Crawl Mode)
High Gear
Unlock
Diffs
Lock
Front
Diff
Lock
Both
Diffs
Low Gear
TURN
R
IG
H
T
T
U
R
N
LE
FT
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TRX-4 Assembly Manual.indd 46
12/28/17 5:33 PM
