Rear axle maintenance work (BMW 3 Series E30)

Changing the oil in the rear axle differential gearbox

The oil in the rear axle differential gearbox must be replaced as part of the vehicle maintenance schedule every 60,000 km.

Make a short drive to allow the oil in the rear axle differential gearbox to reach operating temperature.

Raise the car horizontally.

Unscrew the oil filler plug.

If a little oil flows out, the oil level was 8 normal and the gearbox has no leaks. Otherwise, use your finger to check whether the oil reaches the bottom edge of the hole.

Attention: If there is a significant lack of oil, determine and eliminate the cause.

Unscrew the drain plug and drain the oil into a container underneath.

Note: Old oil is handed over to special waste collection points. The address of the nearest point can be found in the city or village administration. In addition, used oil is accepted free of charge when buying new oil. Never drink old oil or throw it away with household garbage: this causes irreparable harm to the environment, such as pollution of water bodies.

The drain plug has a magnet that collects metal shavings in the gearbox. Clean the plug from metal filings.



Pour in oil from an oiler.

Oil specification: Hypoid gear oil SAE 90. Use only oils recommended by BMW (it's written on the package).

Filling capacity: 1.7 l.

Caution: The oil is viscous. Do not pour too much oil at once. Take breaks and place a container underneath to collect the leaking oil.

Tighten the filler plug to a tightening torque of 55 Nm.

Checking the axle shaft seals

Raise the car.

Pay attention to visible traces of grease on and around the cuffs.

Check the fastening of the clamps.

Inspect the rubber of the cuffs with a lamp for cracks and tears. Be sure to replace torn cuffs of the hinges.

If the cuff is compressed due to internal vacuum or is damaged, it must be replaced immediately.

Examine the original source using the link on the website bmwman.ru