Some routine service actions such as changing the engine unit oil might seem obvious and fundamental, although others such as changing the gearbox oil from its BMW 3 Series may seem to be less automatic. However, produce no mistake, changing the gearbox is just as necessary as changing the engine unit oil. This content will explain the purpose of the gearbox oil, then, why it is important to replace the gearbox of your BMW 3 Series, and finally, how to replace the gearbox oil of a BMW 3 Series .

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Role of gearbox oil on a BMW 3 Series

So we begin our content with the purpose of gearbox oil on a BMW 3 Series. The objective of this short introduction is to produce you understand the interest of this fluid which assures the good working of your motor vehicle. The gearbox of your car has the objective to demultiply the power transmitted by the engine unit and send it back to your wheels . It is done up of pinions and gears that will allow the wheels to rotate at different speeds depending on the curves and the gear engaged. It will operate with the help of an axle and a differential. All these parts will need to be strongly lubricate to action correctly, limit friction and tolerate the high temperatures produced by the engine unit and friction. Your transmission oil has a high viscosity and will prevent the formation of filings or gear breakage, so it is fundamental to the proper working of the gearbox.

Why replacing the gearbox oil from a BMW 3 Series?

Now we’ll discover what’s the point of draining the gearbox oil of your BMW 3 Series?

Benefit of gearbox oil changing BMW 3 Series

There are several concerns to replace the gearbox of your motor vehicle repeatedly, we will list them and detail them below:

  • With time, the oil will lose its viscosity because of friction and temperature rise, which will bring about less lubrication of the gears and pinions and therefore risk to break some of them.
  • Same as viscosity, time and temperature rise will lower the oil resistance to the engine unit temperature, So it will fluidize much more easily when the engine heats up, which is not good for your gearbox.
  • Accumulation of metallic residues: Finally, even if you always have a quality oil, a gearbox is an component that wears out and generates iron filings with friction, the oil will pick them up and if it accumulates too much these residues can get into gears and break them.

When to do the gearbox oil replace on a BMW 3 Series?

If you want to do an automatic or manual gearbox oil change on BMW 3 Series or strong> the procedure is not similar, however, dealers do not give mileage suggestions to replace the oil in your gearbox, nevertheless when you do an intervention on the gearbox it is advisable to replace it, otherwise here are the reasons to produce you take into consideration doing this oil replace.

Oil replace for manual gearbox BMW 3 Series

  • Gears are jumping: you are most certainly missing oil and you may possibly have a gearbox oil leak, please discover our content page on gearbox leaks on BMW 3 Series for more information.
  • The gearbox cracks when you change gears: The oil has absolutely lost viscosity and is too fluid, so the gears get stuck.
  • Difficulty to shift gears: Same problem as just before, the oil is undoubtedly too fluid.

Automatic gearbox oil replace

  • A slow begin from the neutral position to the first one: often a viscosity problem.
  • Difficulty or even impossibility to shift gears: Lack of oil

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How to replace gearbox oil of a BMW 3 Series?

Finally, to conclude this content page, we will explain you how to empty the gearbox oil of your BMW 3 Series , it’s easier than you might believe, here are the few guidelines to stick to to do it correctly:

  • Heat your BMW 3 Series for about 10 minutes to get a fluid oil, place it flat on 4 stands.
  • Install a drain pan under the drain plug, open it, and clean it well because it will most certainly collect filings.
  • Let all the oil run out until it’s all gone.
  • Replace and tighten the cap, then fill with a syringe through the filler cap with the manufacturer’s recommended dose

If perhaps you have any additional questions about the BMW 3 Series, do not hesitate to consult our BMW 3 Series category.