Jeep Wrangler 1997, Manual

Page: 989 / 1152

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.
6), (Fig. 7) and (Fig. 8).
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. 6) and (Fig. 7).
(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. 6) and (Fig. 7).
(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.
(5) Line pressure 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.
Test Three - Transmission In D Range
This test checks pressure regulation and condition
of the clutch circuits. Use both pressure Test Gauges
C-3292 and C-3293-SP for this test.
(1) Connect test gauges to accumulator and front
servo ports (Fig. 6) and (Fig. 7). Use either test
gauge at the two ports.
(2) Start and run engine at 1600 rpm for this test.
(3) Move selector lever to D range. This is two
detents rearward from full forward position.
(4) Read pressures on both gauges as transmission
throttle lever is moved from full forward to full rear-
ward position.
Fig. 6 Pressure Test Ports At Side Of Case
Fig. 7 Pressure Test Ports At Rear Of Case—2WD
Fig. 8 Pressure Test Ports At Rear Of Case—4WD
TJ
TRANSMISSION AND TRANSFER CASE 21 - 83
DIAGNOSIS AND TESTING (Continued)