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Home > Ordnance Documents and other related manuals > > Part D: Decription of The X200-4 Transmission
Part C- Safety Precautions
Figure 1-4. Assembled X200-4 Cross Drive Transmission.

Introduction To The X200-4 Transmission, M113A3
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hour (mph).
The transmission incorporates a single-stage, three-
element, polyphase hydraulic torque converter with a stall torque
ratio of 3.32:1.
The  torque  converter  also  has  a  lockup  clutch  which  engages
automatically in second through the  fourth range.
The principal
purpose of the lockup clutch is to increase vehicle fuel mileage.
Another  benefit,  however,  is  increased  transmission  life  through
elimination of the heat caused by torque converter slippage.
The
lockup unit consists of a friction disk that locks the turbine to the
torque  converter  housing.
The  friction  disk  is  operated  by  a
hydraulic  piston  whose  pressure  is  controlled  by  the  automatic
transmission control system.
Gear types consist of constant mesh, spur, and planetary.  There are
four  forward  ranges  and  one  reverse.
The  range  ratios  are  as
follows:

First
4.16:1

Second
2.34:1

Third
1.46:1

Fourth
1.04:1

Reverse
6.62:1
The steering type used is an infinitely variable, hydrostatically
controlled differential with a minimum steer ratio for ranges first
through fourth and neutral as follows:

First
2.31:1

Second
1.58:1

Third
1.32:1

Fourth
1.22:1

Neutral
Pivot
The braking system is of the multiple wet plate type.
The service
brakes  are  applied  by  mechanical  and  hydraulic  action  while  the
parking/emergency brake is applied mechanically and acts as a back-up
for the service brakes.
As mentioned earlier, the transmission has its own oil system with a
12-gallon capacity.  It has an integral sump and a two-stage integral
oil  filter  with  a  differential  pressure  warning  switch  and  an
automatic bypass.
The transmission weighs 910 pounds (dry weight).
When placed in a shipping/storage container, the combined weight is
approximately 1500 pounds.
Figure 1-4 will familiarize you with the appearance of the X200-4
transmission.  Identifies the right, left, rear, and top positions.
13
OD1714






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