Hydraulic Pressure Tests: Notes

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Electrical Connectors At Case

Courtesy of CHRYSLER LLC

NOTE: Before preforming the hydraulic pressure tests be certain to disconnect the Variable Line Pressure (VLP) electrical connector (2) at the transmission. Check for and clear any codes that may have been set after preforming any hydraulic pressure tests and connecting the Variable Line Pressure (VLP) electrical connector.

Fig 2: Identifying Pressure Taps

Courtesy of CHRYSLER LLC

1 - OVERDRIVE CLUTCH

2 - TORQUE CONVERTER OFF

3 - LOW/REVERSE CLUTCH

4 - 2/4 CLUTCH

5 - REVERSE CLUTCH

6 - UNDERDRIVE CLUTCH

Pressure testing is a very important step in the diagnostic procedure. These tests usually reveal the cause of most hydraulic transaxle problems.

Before performing pressure tests, be certain that fluid level and condition, and shift cable adjustments have been checked and approved. Fluid must be at operating temperature 150 to 200 ° F. (66 to 93 ° C).

Install an engine tachometer, raise vehicle on hoist which allows front wheels to turn, and position tachometer so it can be read.

Attach 300 psi Gauge C-3293SP to port(s) (1) overdrive clutch, (2) torque converter off, (3) low/reverse clutch, (4) 2/4 clutch, (5) reverse clutch, (6) underdrive clutch required for test(s) being conducted. Use Adapter Set L-4559 to adapt gauge(s) to transaxle. See Fig 2.