Traxxas 59076-1 - Manual (Page 38)

38 • SLAYER PRO 4X4
ADVANCED TUNING ADJUSTMENTS
Tuning The Sealed Gear Differentials
Slayer Pro 4x4’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 Pro 4x4 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.
SHOCK TUNING
Shock Pistons
The shock pistons can be replaced with the available optional pistons to
vary the amount of damping. Optional pistons with bypass holes that are
smaller (#2 or #3) than the factory installed stock pistons can be used to
increase damping. From the factory, Slayer Pro 4x4 is equipped with #1
pistons in the front and rear.
Shock disassembly
The shocks must be removed from the vehicle and disassembled to change
the pistons. Use the shock exploded views included with the model to aid in
the assembly process.
1. Remove the spring and lower spring retainer from the shock.
2. Remove the shock cap (A) and empty the shock body of shock oil.
3. Remove the lower cap (B) and the X-ring from the shock body.
4. Use side cutters to grip the shock shaft just above the rod end (C).
Remove the rod end from the shock shaft using the suspension multi
tool (C).
5. Remove the shock shaft with piston
from the shock body out through the
top of the shock body.
Shock assembly
1. Replace the stock piston with desired
optional piston. Be careful not to lose
the small washer located below the
piston.
2. Position the new piston onto the
shock shaft above the small washer.
Grip the threads of the shaft with
side cutters or needlenose pliers
and tighten the nut with the 4-way
wrench to secure the assembly.
3. Insert the shock shaft assembly
through the shock body until the
piston bottoms out.
4. Lubricate the shaft and X-ring with
silicone oil.
5. Install the X-ring over the shaft and
into the bore of the shock body.
6. Install the lower cap using the
suspension multi-tool (B).
7. Slide the bump stop onto the shaft.
8. Grip the shaft close to the threads
with needle nose pliers or side
cutters and thread the rod end onto
the shock shaft until the rod end
bottoms out (C).
9. Fill the shock with new silicone shock oil up
to the top of the shock body. Slowly move
the piston up and down (always keeping it
submerged in oil) to release the air bubbles.
Let the shock sit for a few minutes to allow
any remaining air bubbles to surface.
10. Slowly thread the upper cap with the
installed shock bladder onto the shock body
with the suspension multi-tool (A). The excess
oil will bleed out of the small hole in the shock cap. Tighten the shock
cap until snug. Use the included steel shock wrench to hold onto shock
body while tightening.
11. Reinstall the spring and lower retainer.
A. Tighten/Loosen Upper Cap
C. Remove/Install Rod End
B. Tighten/Loosen Lower Cap
Multi-tool Shock Functions
Piston Installation/Removal
Never slide the threads on
the shock rod past the X-ring
seal when it is installed and
compressed by the bottom
cap of the shock. Doing so will
damage the seal and cause
shock oil to leak.
Use higher viscosity
(thicker) diff 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) diff oil for:
• More power to the wheels
with least traction.
• Racing on low-traction
rough surfaces.