Slayer
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43
The following gear ratio chart shows the available combinations with
optional spur gears, clutch bells, and two-speed gear sets.
Tuning The Sealed Gear Differentials
Slayer’s front and rear gear differentials allow the left and right
wheels to spin at different speeds while turning so that the tires do
not scuff or skid. This decreases the turning radius and increases
steering performance.
The performance of the differentials can be tuned for different driving
conditions and performance requirements. The differentials are filled
with silicone differential fluid, and are sealed to maintain consistent
long-term performance. Changing the oil in the differential with either
lower or higher viscosity oil will vary the performance characteristics of
the differentials. Changing to a higher viscosity oil in the differential will
reduce the tendency for engine power to be transferred to the wheel
with the least traction. You may notice this when making sharp turns
on slick surfaces. The unloaded wheels on the inside of the turn have
the least traction and tend to spin up to extremely high rpms. Higher
viscosity (thicker) oil causes the differential to act like a limited-slip
differential, distributing more equal power to the left and right wheels.
Slayer will generally benefit from higher viscosity oil when climbing, rock
crawling, or racing on low traction surfaces.
Note:
Heavier oil will allow
power to be transferred even with one or more tires off the ground. This
can make the vehicle more likely to overturn.
From the factory, both the differentials are filled with SAE 30,000W
viscosity silicone oil. Only use silicone oil in the differentials. Traxxas
sells SAE 10,000W and SAE 50,000W viscosity oil (see your parts list). The
differentials have to be removed from the vehicle and disassembled to
change/replace oil.
Use higher viscosity
(thicker) oil for:
• More power to the wheels
with the most traction.
• Racing on low-traction
smooth surfaces .
• Better performance for
climbing on uneven terrain.
Using lower viscosity
(thinner) oil for:
• More power to the wheels
with least traction.
• Racing on low-traction
rough surfaces.
*stock configuration out of the box
With 14T Clutch Bell
# of Spur Gear Teeth
Gear
36
38
40
17T/37T
1st
16.87
17.81
18.75
(Standard)
2nd
11.70
12.35
13.00
16T/40T
1st
16.87
17.81
18.75
(Close)
2nd
12.75
13.46
14.17
18T/38T
1st
16.87
17.81
18.75
(Wide)
2nd
10.77
11.37
11.97
With 15T Clutch Bell
(standard)
# of Spur Gear Teeth
2nd gear sets
Gear
36
38
40
17T/37T
1st
15.75
16.62
17.50
(Standard)
2nd
10.92
11.53
12.14
16T/40T
1st
15.75
16.62
17.50
(Close)
2nd
11.90
12.56
13.22
18T/38T
1st
15.75
*
16.62
17.50
(Wide)
2nd
10.05
*
10.61
11.17
With 16T Clutch Bell
# of Spur Gear Teeth
2nd gear sets
Gear
36
38
40
17T/37T
1st
14.76
15.58
16.40
(Standard)
2nd
10.24
10.81
11.38
16T/40T
1st
14.76
15.58
16.40
(Close)
2nd
11.16
11.78
12.40
18T/38T
1st
14.76
15.58
16.40
(Wide)
2nd
9.42
9.95
10.47
With 17T Clutch Bell
# of Spur Gear Teeth
2nd gear sets
Gear
36
38
40
17T/37T
1st
13.89
14.67
15.44
(Standard)
2nd
9.64
10.17
10.71
16T/40T
1st
13.89
14.67
15.44
(Close)
2nd
10.50
11.09
11.67
18T/38T
1st
13.89
14.67
15.44
(Wide)
2nd
8.87
9.36
9.85
Gear Ratio Chart
Advanced Tuning Adjustments
