It is never pleasurable to listen to a sound that you don’t know where it originates from. So, what if you detect a gearbox noise that lasts on your GMC Sierra? It is most likely to be a minimal issues, but before making sure of that, it is best to execute a few verifications. Our staff has composed this content page to help you to solve it. First, we will see what the sources and different gearbox noises can be on GMC Sierra, and second, what are the solutions accessible to you. gearbox-noise-gmc-sierra

The several noises and their sources

A gearbox / your transmission is the significant element of the transmission, it is linked to the clutch that will release the engine pressure on the gearbox mechanisms. Experiencing noises from your GMC Sierra’s gearbox is never a good indicator, its repair is nearly unimaginable to do due to the lack of skilled mecanician and its replacing involves a heavy expense. The advantages is that generally its life expectancy after a first noise is actually quite long, which provides you time to arrange the repair, but it is necessary to examine quickly what is your exact issues.

Your GMC Sierra transmission generates noise in neutral

If you feel a gearbox noise even when you are in neutral, it means that the gearbox’s internal mechanisms are already well worn and that you will have to change it quickly. Indeed, if you are not even with a gear on and it produces noise, the pinions must already be at the end of their life.

You notice a squeaking, a humming noise at the time of the gear shift

If you are regrettably experiencing squeaks, or humming noises when you switch the gears of your GMC Sierra, it is unfortunately a good bet that it is your gears that are starting to fatigued. If this sound is not restricted to passing the first gear and keep going when you drive and shift other gears. This is most likely an indication of a gearbox which is nearly good to be replace. If you have the feeling after checking that the noise comes from the clutch and not the gearbox, we advise you to consult this article to be able to find the causes and solutions to a clutch noise on GMC Sierra.

You feel a whinning or hummin sound from the gearbox of your GMC Sierra

Finally, if you notice a noise close to a humming or whinning sound on the transmssion of your GMC Sierra, it is very often the case that the gearbox of your GMC Sierra lacks oil. Indeed, if it lacks oil, the parts will be exposed and grind agaisnt each other. In addition, each of its contacts will make chips or metal dust that will mix with the oil and produce even greater resistance to mechanisms that are already worn out, a snowball effect will happen if you do not as soon as possible replace the oil. In this case the oil should be black and your can can smell burning. Occasionally this type of noises will be linked to a release bearing on GMC Sierra, don’t hesitate to check out our article.

The solutions existing if you experience a gearbox noise on your GMC Sierra

  • Verify the gearbox oil of your GMC Sierra via the level gauge and consider replacing it if the oil is black
  • Use the double clutch to try to make it last till you’re able to change the gearbox, this will limit the already advanced wear of your gearbox and limit the wear of the pinions.
  • Start looking for a second-hand or new gearbox, very few professionals have the ability to replace damaged parts in your own system, they will almost always offer you a standard exchange.