On this page we will try to help you solve a problem that can be irritating, and if not handled on time become a financial drain. Surely, spotting a leak on your vehicle is hardly ever reassuring, and it is even less reassuring when it’s a gearbox leak on your GMC Sierra . In this article, we’re going to help you confirm that it’s obviously a gearbox leak, then, how to remedy a gearbox or transmission leak, then, give you some prevention tips, and, finally, give you an idea of the price of the gearbox of a GMC Sierra.
Gearbox leak on GMC Sierra, origin and symptom
If you have identified an oil stain on the ground, you will need to confirm that this leak is obviously coming from the gearbox of your GMC Sierra. To accomplish this, you will need to go under your car and follow the oil leak. If it is transmission oil, it must be coming from your gearbox sump or an adjacent room. Once validated, here are the possible sources of this transmission leak:
- A gearbox cap: If it’s improperly screwed on…
- Defective torque converter: Only present on automatic gearboxes.
- From the transmission oil sump: In the event it is cracked or damaged
- One of your seals damaged
How to fix a gearbox leak on GMC Sierra?
After discovering the different sources of a gearbox or transmission oil leak on your GMC Sierra, we will try to explain to you what are your possibilities to remedy this oil leak. Bear in mind that in any case, after having distinguished a leak, you must go to a mechanic to distinguish the exact origin of the leak, in any other case your gearbox might be irreparably damaged. Nevertheless, here is how the service of the mechanic and the solutions that will be offered to you:
- Very often to distinguish the leak, the auto technician will have to dismantle your gearbox, which will necessitate a high labour cost.
- If you’re lucky and it’s just a gasket, your auto technician will change it and reassemble the gearbox of your GMC Sierra, in any other case you’ll have to change the whole gearbox
- Finally, for the do-it-yourselfers, it is possible to use a sealing kit which is only effective in the case of small leaks, this kit is worth around 40 euros
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Prevention: How to avoid gearbox leaks on your GMC Sierra?
There aren’t many alternatives to avoid gearbox leaks on your GMC Sierra , however here are the three most effective:
- Regular oil changes on your gearbox deck.
- Drain your gearbox and put new oil in it. If you want to know everything about this action, please browse our content on this subject matter.
- Use a specific additive for maintenance of gearbox seals, these additives will restore flexibility and allow to plug slight leaks, you will locate some for a few dozen euros at Oscaro.
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Price of a GMC Sierra gearbox
Finally, we would like to give you an idea of how much it costs to change the gearbox of a GMC Sierra. As you have realized, gearbox problems quite often lead to a whole change of this part. It is difficult to give you a precise price because based on the mechanic the labour can vary a lot and based on your engine the part will as well have a different price, however, we estimate that the repair, labour included will cost you between 800 and 2000 euros , knowing that the part alone costs between 400 and 1000 euros.
If you wish more guides on the GMC Sierra, go to our GMC Sierra category.
