(3) Allow vehicle front wheels to turn and increase
throttle opening to achieve an indicated vehicle speed
of 30 mph.
(4) The 2/4 clutch pressure should read 75 to 95 psi.
TEST FIVE-SELECTOR IN ‘‘OD’’
These tests checks the torque converter clutch
hydraulic circuit.
(1) Attach gauge to the torque converter clutch off
pressure tap.
(2) Move selector lever to the OD position.
(3) Allow vehicle wheels to turn and increase
throttle opening to achieve an indicated vehicle speed
of 50 mph.
CAUTION: Both wheels must turn at the same speed.
(4) Torque converter clutch off pressure should be
less than 5 psi.
(5) Now attach the gauge to the torque converter
clutch on pressure tap.
(6) Move selector to the OD position.
(7) Allow vehicle wheels to turn and increase
throttle opening to achieve an indicated vehicle speed
of 50 mph.
(8) Verify the torque converter clutch is applied
mode using the RPM display of the DRB II scan tool.
(9) torque converter clutch on pressure should be
60-90 psi.
TEST SIX-SELECTOR IN ‘‘R’’
This test checks the reverse clutch hydraulic
circuit.
(1) Attach gauge to the reverse clutch tap.
(2) Move selector lever to the ‘‘R’’ position.
(3) Read reverse clutch pressure with output sta-
tionary (foot on brake) and throttle opened to achieve
1500 rpm.
(4) Reverse clutch pressure should read 165 to 235
psi.
TEST RESULT INDICATIONS
(1) If proper line pressure is found in any one test,
the pump and pressure regulator are working properly.
(2) Low pressure in all positions indicates a defec-
tive pump, a clogged filter, or a stuck pressure regula-
tor valve.
(3) Clutch circuit leaks are indicated if pressures do
not fall within the specified pressure range.
(4) If the overdrive clutch pressure is greater than 5
psi in step (6) of Test Three, a worn reaction shaft seal
ring is indicated.
42LE PRESSURE CHECK SPECIFICATIONS
21 - 14 TRANSAXLE
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