Some routine service actions such as changing the engine oil may seem obvious and important, although others such as changing the gearbox oil from its BMW 4 Series may seem to be less natural. However, make no mistake, changing the gearbox is just as necessary as changing the engine oil. This article content will show you the purpose of the gearbox oil, then, why it is important to replace the gearbox of your BMW 4 Series, and at last, how to replace the gearbox oil of a BMW 4 Series .
Function of gearbox oil on a BMW 4 Series
So we start our article content with the purpose of gearbox oil on a BMW 4 Series. The objective of this short introduction is to make you understand the benefit of this fluid which ensures the good performing of your motor vehicle. The gearbox of your car has the mission to demultiply the power transferred by the engine 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 highly lubricate to action properly, limit friction and tolerate the high temperatures generated by the engine and friction. Your transmission oil has a high viscosity and will prevent the formation of filings or gear breakage, so it is necessary to the correct functioning of the gearbox.
Why changing the gearbox oil from a BMW 4 Series?
Now we’ll see what’s the point of draining the gearbox oil of your BMW 4 Series?
Benefit of gearbox oil changing BMW 4 Series
There are several interests to replace the gearbox of your motor vehicle regularly, we will list them and outline them below:
- Over time, the oil will lose its viscosity caused by friction and temperature rise, which will cause less lubrication of the gears and pinions and therefore risk to break some of them.
- Same as viscosity, time and temperature rise will reduce the oil resistance to the engine 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 gathers up too much these residues can get into gears and break them.
When to do the gearbox oil replace on a BMW 4 Series?
If you want to do an automatic or manual gearbox oil change on BMW 4 Series or strong> the procedure is not similar, nevertheless, dealers do not give mileage recommendations to replace the oil in your gearbox, nevertheless when you do an intervention on the gearbox it is advisable to replace it, in any other case here are the causes to make you think about doing this oil replace.
Oil replace for manual gearbox BMW 4 Series
- Gears are jumping: you are probably missing oil and you might have a gearbox oil leak, please see our content page on gearbox leaks on BMW 4 Series for more information.
- The gearbox cracks when you switch gears: The oil has undoubtedly 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 start from the neutral position to the first one: quite often a viscosity problem.
- Difficulty or even impossibility to shift gears: Lack of oil
.
How to replace gearbox oil of a BMW 4 Series?
Finally, to conclude this content page, we will show you you how to empty the gearbox oil of your BMW 4 Series , it’s less difficult than you might think, here are the few actions to follow to do it properly:
- Heat your BMW 4 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 probably gather filings.
- Let all the oil run out until it’s all gone.
- Change and tighten the cap, then fill with a syringe through the filler cap with the manufacturer’s recommended dose
To get more tips on the BMW 4 Series, take a look at the BMW 4 Series category.
