Peugeot 405 Manual

Automatic transmission fluid renewal (24000 Mile (40 000 km) / 2 Year Service)
Routine maintenance and servicing / Automatic transmission fluid renewal (24000 Mile (40 000 km) / 2 Year Service)


Note: On models from 1994, the makers specified interval for this procedure is 18 000 miles (30 000 km).

1 Take the vehicle on a short run, to warm the transmission up to normal operating temperature.

2 Park the car on level ground, then switch off the ignition and apply the handbrake firmly.

For improved access, jack up the front of the car and support it securely on axle stands (see Jacking and Vehicle Support). Note that, when refilling and checking the fluid level, the car must be lowered to the ground, and level, to ensure accuracy.

3 Remove the dipstick, then position a suitable container under the transmission. The transmission has two drain plugs: one on the sump, and another on the bottom of the differential housing (see illustration).

23.3 Automatic transmission fluid drain plugs (arrowed). Transmission is
23.3 Automatic transmission fluid drain plugs (arrowed). Transmission is refilled via the dipstick tube (1)

4 Unscrew both drain plugs, and allow the fluid to drain completely into the container.

Warning: If the fluid is hot, take precautions against scalding.

Clean the drain plugs, being especially careful to wipe any metallic particles off the magnetic insert.

Discard the original sealing washers; these should be renewed whenever they are disturbed.

5 When the fluid has finished draining, clean the drain plug threads and those of the transmission casing. Fit a new sealing washer to each drain plug, and refit the plugs to the transmission, tightening each securely. If the car was raised for the draining operation, now lower it to the ground. Make sure that the car is level (front-to-rear and side-to-side).

6 Refilling the transmission is an awkward operation, adding the specified type of fluid to the transmission a little at a time via the dipstick tube. Use a funnel with a fine mesh gauze, to avoid spillage, and to ensure that no foreign matter enters the transmission. Allow plenty of time for the fluid level to settle properly.

7 Once the level is up to the MAX mark on the dipstick, refit the dipstick. Start the engine, and allow it to idle for a few minutes. Switch the engine off, then recheck the level, topping-up if necessary. Take the car on a short run to fully distribute the new fluid around the transmission, then recheck the fluid level as described in Weekly checks.


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