Road Testing Vehicle — Shift Point Road Test

DIAGNOSIS AND TESTING > PRELIMINARY INSPECTION > WATER IN

TRANSMISSION FLUID

To correctly repair an automatic transmission that has had water or coolant introduced into the system, completely disassemble, clean, and replace the following parts:

All internal and external seals

All friction material

Torque converter

All parts with bonded seals

All solenoids

All transmission fluid filters

Prior to installing the transmission, flush and clean the transmission fluid cooler(s) and the transmission fluid cooler tubes and hoses.

DIAGNOSIS AND TESTING > ROAD TESTING VEHICLE > SHIFT POINT ROAD TEST

Most performance based automatic transmission DTCs require the fault to be detected multiple times before setting a DTC. In many instances the faults musts be detected consecutively a predetermined number of times (up to five). Performing the shift point road test as detailed below increases the likelihood that a DTC sets if a fault is present in the system.

1. Bring engine and transmission up to normal operating temperature.

2. Operate the vehicle with the selector lever in the D position.

3. Apply minimum throttle and observe speeds when an upshift occurs. Refer to the Shift Speeds chart.

4. With the selector lever in the D position and speed above 80 km/h (50 mph) and less than half throttle, move the selector lever from the D position to manual 2 position and release the accelerator pedal. The transmission should downshift into 2nd gear. With the transmission