Jeep KJ 2005 Service Manual page 1710

KJ
AUTOMATIC TRANSMISSION - 42RLE (Continued)
TEST ONE - SELECTOR IN MANUAL 1 (1st Gear)
NOTE: This test checks pump output, pressure reg-
ulation and condition of the low/reverse clutch
hydraulic circuit and shift schedule.
(1) Attach pressure gauge to the low/reverse clutch
tap.
(2) Move selector lever to the MANUAL 1 position.
(3) Allow vehicle wheels to turn and increase
throttle opening to achieve an indicated vehicle speed
to 20 mph.
(4) Low/reverse clutch pressure should read 115 to
145 psi.
TEST TWO - SELECTOR IN MANUAL 2 (Second
Gear)
NOTE: This test checks the underdrive clutch
hydraulic circuit as well as the shift schedule.
(1) Attach gauge to the underdrive clutch tap.
(2) Move selector lever to the MANUAL 2 position.
(3) Allow vehicle wheels to turn and increase
throttle opening to achieve an indicated vehicle speed
of 30 mph.
(4) In second gear the underdrive clutch pressure
should read 110 to 145 psi.
TEST TWO A - SELECTOR IN DRIVE (OD ON -
Fourth Gear)
NOTE: This test checks the underdrive clutch
hydraulic circuit as well as the shift schedule.
(1) Attach gauge to the underdrive clutch tap.
(2) Move selector lever to the DRIVE position.
Verfy that the OD switch is ON.
(3) Allow wheels to rotate freely and increase
throttle opening to achieve an indicated speed of 40
mph.
(4) Underdrive clutch pressure should read below
5 psi. If not, than either the solenoid assembly or
controller is at fault.
TEST THREE - SELECTOR IN DRIVE (OD OFF -
Third and Second Gear)
NOTE: This test checks the overdrive clutch
hydraulic circuit as well as the shift schedule.
(1) Attach gauge to the overdrive clutch tap.
(2) Move selector lever to the DRIVE position.
(3) Allow vehicle wheels to turn and increase
throttle opening to achieve an indicated vehicle speed
of 20 mph.
AUTOMATIC TRANSMISSION - 42RLE
(4) Overdrive clutch pressure should read 74 to 95
psi.
(5) Move selector lever to the DRIVE position and
increase indicated vehicle speed to 30 mph.
(6) The vehicle should be in second gear and over-
drive clutch pressure should be less than 5 psi.
TEST FOUR - SELECTOR IN DRIVE (OD ON -
Fourth Gear)
NOTE: This test checks the 2/4 clutch hydraulic cir-
cuit.
(1) Attach gauge to the 2/4 clutch tap.
(2) Move selector lever to the DRIVE position.
(3) Allow vehicle front wheels to turn and increase
throttle opening to achieve an indicated vehicle speed
of 30 mph. Vehicle should be in fourth gear.
(4) The 2/4 clutch pressure should read 75 to 95
psi.
TEST FIVE-SELECTOR IN DRIVE (OD ON - Fourth
Gear, CC on)
NOTE: These tests check the torque converter
clutch hydraulic circuit.
(1) Attach gauge to the torque converter clutch off
pressure tap.
(2) Move selector lever to the DRIVE position.
(3) Allow vehicle wheels to turn and increase
throttle opening to achieve an indicated vehicle speed
of 50 mph. Vehicle should be in 4th gear, CC on.
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 scan tool.
(9) Torque converter clutch on pressure should be
60-90 psi.
TEST SIX-SELECTOR IN REVERSE
NOTE: This test checks the reverse clutch hydraulic
circuit.
(1) Attach gauge to the reverse and low/reverse
clutch tap.
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