Some maintenance actions such as changing the engine oil might seem obvious and essential, while others such as changing the gearbox oil from its GMC Yukon XL may appear to be less natural. However, make no mistake, changing the gearbox is just as important as changing the engine oil. This content page will show you the role of the gearbox oil, then, why it is necessary to change the gearbox of your GMC Yukon XL, and at last, how to change the gearbox oil of a GMC Yukon XL .

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Role of gearbox oil on a GMC Yukon XL

So we start our content page with the role of gearbox oil on a GMC Yukon XL. The objective of this short introduction is to make you understand the benefit of this fluid which guarantees the good performing of your car. 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 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 highly lubricate to objective accurately, limit friction and tolerate the high temperatures built 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 performing of the gearbox.

Why replacing the gearbox oil from a GMC Yukon XL?

Now we’ll see what’s the point of draining the gearbox oil of your GMC Yukon XL?

Benefit of gearbox oil changing GMC Yukon XL

There are several interests to change the gearbox of your car repeatedly, 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 decrease 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, regardless if you always have a quality oil, a gearbox is an element that wears out and produces iron filings with friction, the oil will pick them up and if it builds up too much these residues can get into gears and break them.

When to do the gearbox oil change on a GMC Yukon XL?

If you want to do an automatic or manual gearbox oil change on GMC Yukon XL or strong> the procedure is not the same, nevertheless, dealers do not give mileage suggestions to change the oil in your gearbox, nevertheless when you do an intervention on the gearbox it is wise to change it, in any other case here are the factors to make you think about doing this oil change.

Oil change for manual gearbox GMC Yukon XL

  • Gears are jumping: you are most likely missing oil and you might have a gearbox oil leak, please see our content page on gearbox leaks on GMC Yukon XL for more info.
  • The gearbox cracks when you change 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 change

  • 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

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How to change gearbox oil of a GMC Yukon XL?

Finally, to finish this content page, we will show you you how to empty the gearbox oil of your GMC Yukon XL , it’s easier than you might believe, here are the few actions to stick to to do it accurately:

  • Heat your GMC Yukon XL 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 likely 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 suggested dose

In the event that you have any additional questions about the GMC Yukon XL, do not hesitate to consult our GMC Yukon XL category.