Jeep Cherokee 2000, Service Manual

Page: 1038 / 1528

governor, and front servo pressure ports. Test Gauge
C-3293-SP has a 300 psi range and is used at the
rear servo port and overdrive test ports where pres-
sures are higher. In cases where two test gauges are
required, the 300 psi gauge can be used at any of the
other test ports.
Pressure Test Port Locations
Pressure test ports locations are provided at the
accumulator, front servo, and rear servo, governor
passage, and overdrive clutch pressure passage (Fig.
57), (Fig. 58) and (Fig. 59).
Line pressure is checked at the accumulator port
on the right side of the case. The front servo pressure
port is at the right side of the case just behind the
filler tube opening.
Connect a tachometer to the engine. Position the
tachometer so it can be observed from under the
vehicle. Raise the vehicle on a hoist that will allow
the wheels to rotate freely.
PRESSURE TEST PROCEDURE
Test One - Transmission In 1 Range
This test checks pump output, pressure regulation,
and condition of the rear clutch and servo circuit.
Test Gauges C-3292 and C-3293-SP are required for
this test. Gauge C-3292 has a 100 psi range. Gauge
C-3293-SP has a 300 psi range.
(1) Connect 100 psi Gauge C-3292 to accumulator
port.
(2) Connect 300 psi Gauge C-3293-SP to rear servo
port (Fig. 57) and (Fig. 58).
(3) Disconnect throttle and gearshift rods from
manual and throttle levers.
(4) Start and run engine at 1000 rpm.
(5) Move shift lever (on manual lever shaft) all the
way forward into 1 range.
(6) Move transmission throttle lever from full for-
ward to full rearward position and note pressures on
both gauges.
(7) Line pressure at accumulator port should be
54-60 psi (372-414 kPa) with throttle lever forward
and gradually increase to 90-96 psi (621-662 kPa) as
lever is moved rearward.
(8) Rear servo pressure should be same as line
pressure within 3 psi (20.68 kPa).
Test Two - Transmission In 2 Range
This test checks pump output and pressure regula-
tion. Use 100 psi Test Gauge C-3292 for this test.
(1) Connect test gauge to accumulator pressure
port (Fig. 57) and (Fig. 58).
(2) Start and run engine at 1000 rpm.
(3) Move shift lever on valve body manual lever
shaft, one detent rearward from full forward position.
This is 2 range.
(4) Move transmission throttle lever from full for-
ward to full rearward position and read pressure at
both gauges.
Fig. 57 Pressure Test Ports At Side Of Case
1 – REAR SERVO PORT
2 – LINE PRESSURE PORT
3 – FRONT SERVO PORT
Fig. 58 Pressure Test Ports At Rear Of Case—2WD
1 – GOVERNOR PRESSURE PORT
2 – REAR SERVO PRESSURE PORT
Fig. 59 Pressure Test Ports At Rear Of Case—4WD
1 – ADAPTER HOUSING
2 – GOVERNOR PRESSURE PORT PLUG
21 - 130 AUTOMATIC TRANSMISSION—30RH
XJ
DIAGNOSIS AND TESTING (Continued)