Line Pressure Test

Line Pressure Test

Part 1 Of 2:

Part 2 Of 2:

Line Pressure Chart

CAUTION: Carry out the line pressure test prior to carrying out the stall speed test. If the line pressure is low at stall, do not carry out stall speed test or further transmission damage will occur. Do not maintain WOT in any transmission range for more than five seconds.

This test verifies that the line pressure is within specification.

1. Connect pressure gauge -to line pressure tap.
2. Start engine and check line pressures. Refer to the Line Pressure Chart to determine if line pressure is within specification.

Special Testing Procedures
The special tests are designed to aid the technician in diagnosing the hydraulic and mechanical portion of the transmission.





Clutch Pressure Chart 3.8L





Clutch Pressure Chart 4.6L

3. Place the ignition switch in the OFF position. If line pressure is not within specification, check EPC pressure.
4. Connect pressure gauge to EPC pressure tap.
5. Start engine and check EPC pressure. Use the line pressure chart for specifications.





Line Pressure Diagnosis Chart

6. If EPC pressure is not within specification, GO to Pinpoint Test E to diagnose EPC operation. If EPC operation is OK, see the line pressure diagnosis chart for line pressure concern causes.