Chrysler Conquest 1988 Service Manual page 1025

REAR AXLE - General Information
3-7
Total drive torque
I(1 +1)x2-I]+[(1 +I)-I]=4
2
..::::::::::::.
=
(1 +1)x2-11
I(1 + I)-11
*2 *I
"2
Cl
"I.
*2.
Negative torque from the brake operation
Supposing that the braking torque for both
wheels is 1.
IlFlOC
MAKING EFFECTIVE USE OF A LIMITED SLIP DIFFEREN-
TIAL
Effective Use in Combination with the Brakes
If a wheel is in contact with a slippery road surface and has
begun to spin, using the brakes in combination with the limited
slip differential will provide even greater traction capability. The
resistance caused by the brakes will further increase the drive
torque of the engine, and this increased torque will increase the
clutch plate pressing force of the pressure ring, thus increasing
the traction. also, the drive force transmitted to the brakes will
not function as real drive force. This is shown in the illustration
at right. The application rate is Rt = 2, and, supposing the
torque from the brake operation is 1, a drive torque of 1 + 1 = 2
will be applied to the spinning wheel (the right wheel), and a
drive torque of twice that which is applied to the spinning
wheel, or (1 -I- 1) x 2 = 4, will be applied to the wheel which is
not spinning (the left wheel). However, because the brake
force of 1 is a negative value with regard to the propulsion
torque of each wheel, the propulsion torque actually obtained
by the right wheel is (1 + 1) - 1 = 1, and that obtained by the
left wheel is [(I + I) x 2 - I] = 3.
Therefore, the total drive torque is 1 + 3 = 4. In the same
circumstances, the total drive torque of a conventional differen-
tial is 1 + 1 = 2, and that of a limited slip differential when the
brakes are not used in combinadon is 1 + 2 = 3. This
represents an increase in the traction by a factor of 2 over that
of a conventional differential, and by a factor of 1.3 over that of
a limited slip differential when the brakes are not used.
NOTES REGARDING SERVICE PROCEDURES FOR THE
LIMITED SLIP DIFFERENTIAL
(1) The engine must never be operated while only a single _
wheel is jacked up. Doing so is extremely dangerous; if the
differential functions while the engine is operated at high
speed, the oil film between the clutch plates will decrease,
thus causing the friction coefficient to increase, the
prescribed torque ratio will be exceeded, an excessive
amount of torque will be applied to the stationary wheel,
and the vehicle will move forward. Also, resistance must
never be applied to the spinning wheel.
(2) In the event that one of the wheels comes in contact with a
slippery road surface and begins to spin, if the engine
continues to be operated at high speed for too long, the
clutch plates might become abnormally worn; such action
must be avoided.
(3) As gear oil, use MOPAR Hypoid Gear Lubricant (part
number 4318058) to which MOPAR Hypoid Gear Oil
Additive/Friction Modifier (part number 4318060) has been
added. When changing the oil, the oil which is removed will
appear considerably blacker than ordinary oil. This, howev-
er, is not a change in color due to the deterioration of the oil,
but rather the oil has become mixed with worn particles of
the special treatment on the clutch plates.