28—TORQUE-ELITE TRANSMISSION
CHRYSLER SERVICE MANUAL
vehicle is accelerated in second gear to the wide
open throttle upshift speed, an upshift to direct
will occur, thus eliminating over-speeding the
engine in second gear. Operation of the 1-2 and
2-1 shift occur in the same manner as in the
D (drive) position.
Pushing in the 1 (low) button of the control
unit positions the manual valve so that line
pressure is directed to the kickdown circuit of
the 1-2 shift valve. This results in a downshift
to low only if the vehicle speed is below the
3-1 kickdown limit. Use of 1 (low) is intended
primarily for engine braking so it is also nec-
essary that the low-reverse band be engaged
to lock the overrunning clutch. Line pressure
from the low speed port of the manual valve
body is fed to the low port of the 1-2 shift valve
governor plug where it is blocked until gover-
nor pressure drops sufficiently so that line pres-
sure at the kickdown plug overcomes it and the
complete valve train shifts down. After the
downshift, pressure at the low port of the gov-
ernor plug is permitted to react on an area of
the governor plug and also directed to the low-
reverse servo. Then, the line pressure, acting
on the combined areas of the governor plug
and the kickdown plug, prevent an upshift—
regardless of vehicle speed.
Pushing in the N (neutral) button moves the
manual valve to a position which shuts off oil
flow to the valve bodies. The torque converter
and lubrication system remains pressurized.
Pushing in the R (reverse) button of the
control unit positions the manual valve so that
oil pressure is directed to apply the rear clutch
and low-reverse band. In order to transmit the
high torque loads involved in reverse operation,
the system pressure is raised to 225 psi. by cut-
ting off the pressure, and venting of the sec-
ondary reaction area of the regulator valve.
MAINTENANCE, ADJUSTMENTS AND TESTS
CAUTION
While in the process of making adjustments and
tests,
do not stall test the torque converter. For
safety reasons and because damage to the trans-
mission may result, wide open throttle stall op-
eration should not be attempted.
10.
ROAD TESTING THE TRANSMISSION
First check the transmission fluid level and set
engine idle. Good transmission operation de-
pends on good engine operation. Make sure the
engine is operating at full efficiency. If when
tuning the engine, the throttle linkage between
the carburetor and the transmission is disturbed,
it will be necessary to readjust the linkage.
Before attempting to diagnose or correct the
transmission operation, the engine and trans-
mission should be warmed up to operating tem-
perature. A short drive, approximately five to
ten miles, with frequent starts and stops will
create normal operating temperature of the
engine and transmission.
All shifts and kickdowns should occur within
speed ranges given in the Shift Pattern Sum-
mary Chart.
EXPLANATION OF INDEX ITEMS
Never remove a transmission from a car
until all the possible "in car" causes have been
checked for the operating difficulty and the oil
pan has been removed to check for dirt, metal
chips,
band material, broken band ends, and
burned or scored band contacting surfaces.
Also,
check the manual control cable and throt-
tle linkage for adjustment and wear.
A. Oil Level—Refer to Lubrication Section
of this manual.
B.
Throttle Linkage—Refer to Paragraph 16.
C.
Gearshift control cable—Refer to Para-
graph 13.
D.
Pressure tap check—Hydraulic pressure
taps have been provided to check the following
pressures: line, lubrication, governor, rear
clutch apply, and throttle (compensated). These
pressures should fall within the specified limits
stated in the Hydraulic Control Pressure Check
Charts.
E.
Kickdown band adjustment—The kick-
down band adjustment screw is found on the
left side of the transmission case (Fig. 22).
Refer to Paragraph 15.
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