Some routine service actions such as changing the engine unit oil may seem obvious and fundamental, while others such as changing the gearbox oil from its GMC Sierra may seem less automatic. However, make no mistake, changing the gearbox is just as necessary as changing the engine unit oil. This guideline will show you the purpose of the gearbox oil, then, why it is vital to change the gearbox of your GMC Sierra, and finally, how to change the gearbox oil of a GMC Sierra .
Purpose of gearbox oil on a GMC Sierra
So we begin our guideline with the purpose of gearbox oil on a GMC Sierra. The objective of this short introduction is to make you understand the interest of this fluid which guarantees the good performance of your motor vehicle. The gearbox of your car has the mission 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 auto parts will need to be highly lubricate to objective 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 important to the correct functioning of the gearbox.
Why changing the gearbox oil from a GMC Sierra?
Now we’ll find out what’s the point of draining the gearbox oil of your GMC Sierra?
Interest of gearbox oil changing GMC Sierra
There are several concerns to change the gearbox of your motor vehicle repeatedly, we will list them and outline them below:
- As time passes, 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 constantly have a quality oil, a gearbox is an component that wears out and produces 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 change on a GMC Sierra?
If you want to do an automatic or manual gearbox oil change on GMC Sierra or strong> the procedure is not the same, nevertheless, dealers do not give mileage recommendations to change the oil in your gearbox, however 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 Sierra
- Gears are jumping: you are almost certainly missing oil and you may have a gearbox oil leak, please find out our content page on gearbox leaks on GMC Sierra for more info.
- The gearbox cracks when you switch gears: The oil has certainly lost viscosity and is too fluid, so the gears get stuck.
- Difficulty to shift gears: Same issue as just before, the oil is absolutely too fluid.
Automatic gearbox oil change
- A slow begin from the neutral position to the first one: generally a viscosity issue.
- Difficulty or even impossibility to shift gears: Lack of oil
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How to change gearbox oil of a GMC Sierra?
Finally, to finish this content page, we will show you you how to empty the gearbox oil of your GMC Sierra , it’s much easier than you might believe, here are the few actions to stick to to do it correctly:
- Heat your GMC Sierra 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 almost 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 suggested dose
If you want more tutorials on the GMC Sierra, go to our GMC Sierra category.
