Gearing Down LTI American Flyer Power Trucks
| The
stock
Lionel/AF
power
truck
has
very
poor
low
speed
performance
due
to
it's
gearing.
This
is
a
simple
modification
that
uses
a
replacement
Lionel
motor
and
a
gear
from
one
of
their
other
engines
with
a
simple
bracket
that
is
easy
to
make. This modification increases the stock gear ratio from 10:1 to 25:1. The low end speed and starting performance is much smoother Click on pictures for larger view |
 |
The
Speed
is
reduced
so
yard
and
switching
duties
are
very
realistic. The motor is Lionel part #610-8606-103 $12.00 It is the same motor as the original but comes with a different pinion gear |
| There is no modification to the truck except for the motor screw hole. Reversal of the modification is simple by re-installing the original parts. The hole would not be visible when restored to original configuration |  |
 |
Top view of the gear bracket made from a piece of 1/16" aluminum stock. |
| A motor mounting screw has to be added to the plastic bracket. It is visible just below the pinion gear in this picture. |  |
 |
The
intermediate
gear
is
Lionel
part #610-8501-117 $.90 |
| This
is
a
picture
of
the
parts
in
the
new
bracket
Assembly. The gear shaft is made from a 6-32x1" Allen head cap screw cut down so the thread length just sticks though the threaded hole in the bracket and the head is ground flat for clearance. The washers are selected for best fit with as little play as possible |
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