Some routine service actions such as changing the engine unit oil may seem obvious and important, although others such as changing the gearbox oil from its BMW 7 Series may appear to be less automatic. Nevertheless, make no mistake, changing the gearbox is just as necessary as changing the engine unit oil. This article will explain the role of the gearbox oil, then, why it is essential to replace the gearbox of your BMW 7 Series, and at last, how to replace the gearbox oil of a BMW 7 Series .
Purpose of gearbox oil on a BMW 7 Series
So we begin our article with the role of gearbox oil on a BMW 7 Series. The objective of this short introduction is to make you understand the benefit of this fluid which guarantees the good performance 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 made 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 firmly lubricate to action properly, limit friction and tolerate the high temperatures generated 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 essential to the correct performing of the gearbox.
Why changing the gearbox oil from a BMW 7 Series?
Now we’ll find out what’s the point of draining the gearbox oil of your BMW 7 Series?
Benefit of gearbox oil changing BMW 7 Series
There are several interests to replace the gearbox of your motor vehicle repeatedly, we will list them and outline them below:
- After a while, the oil will lose its viscosity because of 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 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, regardless if you always have a quality oil, a gearbox is an component that wears out and releases 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 7 Series?
Whether you want to do an automatic or manual gearbox oil change on BMW 7 Series or strong> the process is not the same, nevertheless, dealers do not give mileage suggestions to replace the oil in your gearbox, on the other hand when you do an intervention on the gearbox it is advisable to replace it, in any other case here are the reasons to make you think about doing this oil replace.
Oil replace for manual gearbox BMW 7 Series
- Gears are jumping: you are likely missing oil and you may have a gearbox oil leak, please find out our article on gearbox leaks on BMW 7 Series for more info.
- The gearbox cracks when you switch gears: The oil has absolutely lost viscosity and is too fluid, so the gears get stuck.
- Difficulty to shift gears: Same issue as just before, the oil is certainly too fluid.
Automatic gearbox oil replace
- A slow begin from the neutral position to the first one: often a viscosity issue.
- Difficulty or even impossibility to shift gears: Lack of oil
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How to replace gearbox oil of a BMW 7 Series?
At last, to finish this article, we will explain you how to empty the gearbox oil of your BMW 7 Series , it’s much easier than you might think, here are the few steps to follow to do it properly:
- Heat your BMW 7 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 likely gather 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 you need more guides on the BMW 7 Series, go to our BMW 7 Series category.
