Motors And Gearing - Traxxas SLEDGE Owner's Manual

Gearing Compatibility Chart:
The chart below shows recommended
gear combination ranges for your model.
Spur Gear
46 52
11 4.18 4.73
12 3.83 4.33
13 3.54 4.00
14 3.29 3.71
15 3.07 3.47
16 2.88 3.25
17 2.71 3.06
18 2.56 2.89
19 2.42 -
20 2.30 -
21 2.19 -
22 2.09 -
23 2.00 -
24 1.92 -
Out of Box Setup; recommended for most
running, 4s/6s LiPo.
2s 5000mAh + recommended
3s 5000mAh + recommended
Usable gearing range for 4S/6S LiPo.
Increases torque and run time.
2s 5000mAh + recommended
3s 5000mAh + recommended
Fits; for high-speed running only.
Fits; not recommended.
Does not fit.
24 • SLEDGE
BASIC TUNING ADJUSTMENTS

MOTORS AND GEARING

One of the more significant advantages to your model's
transmission is the wide range of available gear ratios. Changing
the gearing allows you to fine tune the speed of the model and
control the temperatures of the battery pack and motor. Use a
lower gear ratio (numerically larger) to reduce current draw and
temperatures. Use a higher gear (numerically lower) to increase top
speed. Use the following formula to calculate the overall ratio for
combinations not listed on the gear chart:
# Spur Gear Teeth
x 4.3 = Final Gear Ratio
# Pinion Gear Teeth
When using higher gear ratios, it is important to monitor the
temperatures of the battery, motor, and speed control. If the
battery is extremely hot (150°F) and/or the motor is too hot to
touch (180°F), your model is probably over-geared and drawing
too much current. This temperature test assumes that the model is
close to factory stock weight and operates freely with no excessive
friction, dragging, or binding, and the battery is fully charged and
in good condition.
This model is equipped with a 2000Kv brushless motor. The gear
combination that comes stock on each model provides good overall
acceleration and top speed. If you want more top speed and less
acceleration, install optional high speed gearing (more teeth). If you
want more acceleration and less top speed, use a smaller optional
pinion gear. Optional gearing not included.
Note: High speed gearing is intended for high-speed running on
hard surfaces and is not recommended for off-road or repetitive
starting and stopping. For this type of driving, smaller pinion
gears are recommended to reduce load on the motor.
Adjusting Gear Mesh
Incorrect gear mesh is the
most common cause of
stripped spur gears. Sledge
makes improper gear
mesh virtually impossible.
A factory installed fixed
gear adapter helps set the
motor in the proper place
according to the pinion and
spur gear that are selected.
Note: Should you choose
to do so, you can also set
the gear mesh manually
without using the fixed gear
adapter. Access the spur
gear by removing the four
3x15mm cap screws from
the gear cover. Loosen and
remove the four 4x8mm flat-head screws from the motor assembly;
then, remove the motor assembly from the chassis. Remove the
3x8mm countersunk cap screw from the adapter to remove it. With
the adapter removed, reinstall the motor assembly on the chassis
using the four removed 4x8mm flat-head screws. Use the screws to
set the gear mesh. Cut a narrow strip of notebook paper and run it
into the gear mesh. Slide the motor and pinion gear into the spur
gear. Tighten the four 4x8mm flat-head screws, and then remove
the strip of paper. You should be able to run a fresh strip of paper
through the gears without binding them.
FUN ZONE
Sledge 35+mph 45+mph
Pinion/Spur 13/52* 16/52**
Battery 4S LiPo 4S LiPo
† †
Nominal Voltage 14.8V 14.8V
mAh 5000+ mAh 6700+ mAh
Skill Level
*Stock Gearing
** Optional gearing sold separately.
† One 4S 6700 or Two 2S 7600
See your hobby dealer.
1. 3x15mm CS
2. 4x8mm FCS
3. 3x8mm CCS
Your Battery Selection and Pinion/Spur
Selection Determines Your Speed.
How Fast Do You Want To Go?
TOP SPEED ZONE
55+mph 65+mph 70+mph
13/52* 16/52** 18/46**
Two 3S LiPo Two 3S LiPo Two 3S LiPo
22.2V 22.2V 22.2V
5000+ mAh 5000+ mAh 5000+ mAh
May Require
Additional
Modi cations
From Stock