PRO4005-00 Pro-Line PRO-MT 4x4 Monster Truck Manual

13
CENTER DIFFERENTIAL
Stock oil included in the center diff is 100,000 cSt.
When using 1:8 buggy motor systems with 4S Lipo power,
you may nd that the center diff is sending too much power
to the front wheels when the truck wheelies. To provide more
balanced wheel speed front to rear with extreme power systems,
use heavier diff uid in the center diff. 1 Million cSt diff uid is
generally a good place to start.
MOTOR & GEAR RATIOS
The Internal Gear Ratio of the PRO-MT 4x4 is 4:1 and the
included Mod 1 Spur Gear is 44T.
A 16T Mod 1 Pinion Gear is included as a good starting point
for most applications. If using a less powerful 550 motor, using
a smaller pinion gear might be necessary to prevent the motor
system from overheating.
When using high powered 1:8 Motor Systems and 4S Lipo
power, Pro-Line testing has found motors in the 1900 kV range
to be best for using the full range of Gear Ratios available (14T
to 21T).
Larger pinion sizes typically provide higher top speeds but
reduced bottom end power, while smaller pinion sizes are
opposite. When using higher kV 1:8 motors with 4S Lipo power,
start with the smallest pinion gear to prevent the motor system
from overheating. If the battery is extremely hot, and/or the motor
is so hot that you cannot touch it, use a smaller pinion gear.
Pinion Size 14 15 16 17 18 19 20 21
Final Gear Ratio 12.6 11.7 11.0 10.4 9.8 9.3 8.8 8.4
Rollout (Inches per motor revolution)
1.30 1.40 1.49 1.58 1.67 1.77 1.86 1.95
SHOCK OIL & LOCATION
Stock shock oil for the PRO-MT 4×4 is 40wt. There are two shock
mounting locations on the shock towers and two on the lower arms.
The stock locations are on the inside holes, front and rear. This
provides a smooth steering response and helps absorb bumps
in rough terrain. The outer holes on the tower and arm provide
a stiffer, more direct feel, while the outside hole on the arm also
limits downtravel.
RIDE HEIGHT
This is the height of the chassis in relation to the surface. It is
an adjustment that affects the way your PRO-MT 4×4 turns and
goes through bumps.
To check the ride height, drop your vehicle with tires fastened
from about a 5-6 inch height onto a at surface. Once it settles
into a position, check the height of each end of the vehicle in
relationship to the surface. To raise the ride height, lower the
shock collar on the shock evenly. To lower the ride height, raise
the shock collar. Both left and right collars should be adjusted
evenly.