Transmission Fluid, Replacing

Changing oil

Note! Oil grade:Only ATF oil, Volvo P/N 1161540-8 (1 liter containers) may be used.

Warning! Avoid skin contact with transmission fluid.

Conditions for changing

The oil should be replaced only in the two following instances:
Where diagnostic trouble codes (DTCs) TCM 0042 and TCM 0046 are stored, in which case the diagnostic function activates the warning lamp in the following circumstances.
The transmission control module (TCM) receives data about the operating temperature of the transmission fluid while the car is being driven. TCM 0042 is stored after an accumulated amount of time.
Diagnostic trouble code (DTC) TCM 0046 is stored if the transmission fluid temperature exceeds 150° C for more than two minutes.
For cars in continuous taxi service and cars used to tow trailers extensively, oil should be changed at 75,000 km ± 5,000 km service intervals. This is to conform to the regular service program.

Warning! The oil may be very hot if the car has just been driven. Avoid skin contact.

Draining





Remove:
- the splash guard under engine (certain versions)
- the oil plug. Drain the transmission oil.

Installing the oil plug
Use a new gasket.
Tighten the plug to 40 Nm .
Install splash guard (certain variants).

Preparing to flush the transmission




Remove the battery and the battery shelf.
Remove the return hose on the control system cover.
Install a plastic plug in the connection on the cover.
Install a transparent plastic hose on the oil return hose connection.
Place a container beneath the hose to catch the oil.
Temporarily reinstall the battery shelf and the battery.

Filling with oil
Apply the parking brake. Move the gear selector lever to position P.
Fill with approximately 2 liters of oil.
Start the engine and let it idle.
Turn the engine off when air bubbles start to become visible in the hose.
Fill with approximately 2 liters of oil.
Start the engine again and let it idle.
Turn the engine off when air bubbles start to become visible in the hose.
Remove the battery and the battery shelf.
Remove the hose from the connection.
Install the return hose on transmission cover. Install the battery shelf and the battery.

Further filling
Fill with approximately 2 liters of oil.
Apply the parking brake.
Start the engine and let it idle. Move the gear selector through all the gear positions. Wait 4-5 seconds in each gear.

Checking the oil level

See Checking the oil level Checking Oil Level.
The capacity of the transmission is 7.1 ± 0.1 liters. (MAX, MIN).

Note! After replacing the transmission, the adaptation and the "Transmission oil change" counter must be reset. See Resetting Transmission fluid change counter, AW55-50/51SN Resetting Transmission Oil Replacement Counter.