22 • SLASH VXL
To achieve a good starting
point for the slipper clutch,
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 counter-
clockwise 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 counter-clockwise from
fully compressed.
ADJUSTING YOUR MODEL
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 rear wheels to prevent
tire spin. When it slips,
the slipper clutch makes a
high-pitch, whining noise. Remove the rubber slipper clutch plug
on the transmission cover in order to adjust the slipper. Use the
4-way wrench to turn the adjusting nut clockwise to tighten and
counter-clockwise to loosen. Place the model on a high-traction
surface, such as carpet. Adjust the slipper so that you can hear it
slip for approximately two feet from a standing, full throttle start.
(Learn more about adjusting the slipper clutch in the sidebar.)
Motor and Gearing
One of the more significant advantages to your model’s
transmission is the extremely wide range of available gear
ratios. It can be geared low enough to run an extremely hot,
modified motor. A higher kV motor should be geared lower
(higher numerically) than a stock motor because it will reach its
maximum power at higher RPM’s. A higher kV motor that is geared
incorrectly can actually be slower than a correctly-geared, stock
motor. Use the following formula to calculate the overall ratio for
combinations not listed on the gear chart:
If you are worried that you might be over-geared, check the
temperature of the battery pack and motor. If the battery is
extremely hot, and/or the motor is too hot to touch, your model is
probably over-geared. If you are not able to run your model for at least
four minutes before the battery dies, then change to a lower gear
ratio. 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.
The model is equipped with a Velineon 3500 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 the included high speed gearing (more teeth).
If you want more acceleration and less top speed, use a smaller
optional (not included) pinion gear.
The included high speed
gearing is intended for high-speed running on hard surfaces, and
this gearing 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.
Gearing Compatibility Chart
The chart to the left shows a full
range of gear combinations. This
does NOT imply that these gear
combinations should be used.
Over-gearing (bigger pinions,
smaller spurs) can overheat
and damage the motor and/or
speed control.
Tighten
Loosen
# Spur Gear Teeth
x 2.72 = Final Gear Ratio
# Pinion Gear Teeth
• Fast Acceleration
• Short Distances
• Small Tracks
19-Tooth Pinion*
86-Tooth Spur
• Good Acceleration
• Good Speed
• Normal Conditions
23-Tooth Pinion
86-Tooth Spur
• High Top Speed
• Long Distances
• Hard Surfaces
28-Tooth Pinion
86-Tooth Spur
*optional (sold separately)
Spur Gear
Pinion Gear
76
83
86
90
12
-
-
19.50
20.40
13
-
-
18.01
18.82
14
-
-
16.70
17.49
15
-
15.04
15.58
16.32
16
-
14.12
14.63
15.31
17
-
13.27
13.76
14.39
18
-
12.54
13.00
13.60
19
-
11.89
12.32
12.89
20
-
11.28
11.69
12.24
21
-
10.75
11.14
11.66
22
9.38
10.25
10.63
11.12
23
8.97
9.82
10.17
10.63
24
8.62
9.41
9.74
10.20
25
8.27
9.03
9.36
9.79
26
7.94
8.67
9.00
-
27
7.64
8.35
8.67
-
28
7.37
8.05
8.35
-
29
7.12
7.78
8.08
-
30
6.88
7.53
-
-
31
6.66
7.29
-
-
32
-
7.04
-
-
33
-
-
-
-
34
-
-
-
-
35
-
-
-
-
Recommended Gear Range.
Stock Gearing.
Included optional gearing,
for high-speed running only.
Not recommended.
For high-speed runs only, not recom-
mended for use with NiMH batteries.
High-current LiPo batteries required.
For high-speed running only.
