Important: It is essential that a reverse flush and oil cooler flow rate check is performed, after any of the following situations:
| • | Transmission is replaced |
| • | Fluid contamination is suspected. |
| • | Whenever the oil pump and/or torque converter is replaced. |
| | Important: The reverse flush must be completed prior to conducting a flow rate check
|
Reverse Flush
The recommended procedure for reverse flushing the transmission cooler and lines, particularly after an overhauled or replaced transmission has been installed into the vehicle, is as follows:
Disconnect both cooler lines at the transmission and at the radiator cooler end. Refer to
Transmission Fluid Cooler Hose/Pipe Replacement.
Installation Procedure
- Replace the filler tube seal and lubricate with transmission fluid then install it into transmission case.
- Reinstall the filler tube in the reverse order to removal but secure the transmission breather hose to the hole in the filter tube bracket (arrow) where fitted before the tube is installed into the transmission case seal.
- Tighten the filler tune bracket retaining bolt to the correct torque specification.
Tighten
Tighten the filler tube retaining bracket bolt to 30 N·m.
- Check the cooler line to cooler fitting, sealing washers for damage, replacing as required.
- Reconnect cooler lines to the transmission and cooler but leave the cooler return line to transmission connection open.
- Conduct a flow rate test as described below, to ensure that any restriction has been cleared.
- If flow rate is satisfactory, reconnect the return line to the transmission quick connect fitting.
- Tighten the cooler line flange buts at the cooler end (V6 engines only) to the correct torque specifications. Refer to
Transmission Fluid Cooler Hose/Pipe Replacement.
Tighten
| • | Tighten the filler tube retaining bracket bolt to 30 N·m. |
| • | Tighten the oil cooler line to radiator fitting to 25 N·m. |
- Lower vehicle and check fluid level as detailed in 2.1 Fluid Level. Refer to
Transmission Fluid Check.
Flow Rate Test
- When installing the transmission assembly, leave the cooler return line disconnected from the transmission (upper fitting).
- Ensure that the fluid level is to the recommended level. Refer to
Transmission Fluid Check.
- Place a container underneath the disconnected cooler line.
- With the selector lever in the Neutral position, start the engine and observe the fluid flow into the container, after all air bubbles have ceased and a steady flow is evident. Measure the flow rate.
Transmission fluid flow rate specification per 20 seconds:
- If the flow rate is less than this specification, the source of the restriction must be located and rectified. Possibilities are either:
| • | External cooler (if fitted) |
- Reinstall the cooler return line tot he transmission quick connect. Refer to
Transmission Fluid Cooler Hose/Pipe Replacement.
