Gearbox oil leakage: causes and solutions

The gearbox is a very important part of driving your car forward or backward. Sometimes it happens that the gearbox starts to leak, in which case you will definitely see a stain under the car or smell a strong smell of oil. If you don't know what to do in case of a transmission leak, in this article we will explain everything you need to know!

🚗 What is a car gearbox?

A gearbox is a mechanical or hydraulic system that moves a car forward or backward. Therefore, here it is an important element of your car. The gearbox contains oil to lubricate the various bearings inside. Indeed, this oil is the blood of your car. It is used to lubricate the moving parts of your engine to prevent friction between all those metal parts.

🔍 Where does the transmission fluid come from?

If you spot an oil stain on the floor, here's where it might come from:

• poorly screwed cap that allows oil to pass through
• gearbox oil pan that may be punctured or cracked
• faulty torque converter (least often: he is responsible for shifting gears in the automatic transmission)

If you're having trouble shifting gears and your derailleur is bouncing, that's a good red flag. So you can tell yourself it's time to top up the oil.

🔧 How to fix transmission oil leakage?

It is highly recommended that you immediately contact one of our trusted service centers to determine the cause of the symptom. Indeed, in most cases, repairs are necessary. Most often, it consists of disassembling the transmission and then checking it to determine the cause of the leak (worn seal, damaged crankcase, damaged converter, etc.) and confirm that the transmission is defective.

💰 How much does the gearbox cost?

If repairs are not possible, you will have to replace the transmission. Its price, of course, depends on the type and model of the vehicle. Its cost is estimated from 500 to 2 euros.

We offer you a small price table depending on the model and brand of your car:

In some cases, this type of leak can be repaired without completely disassembling the transmission. For this, there are kits that allow you to change the sealing system of the box. They cost about 30 euros. This type of intervention will take about an hour if you are intervening yourself and are not entirely new to mechanics.

Here is a table that gives you an idea of ​​the price of this kit depending on the model and make of your vehicle:

To reduce the risk of transmission leakage, it is important to regularly change the axle oil. Drainage from the gearbox lubricates the components while maintaining the optimum gearbox oil temperature. A special additive can be used. It is added to the engine oil at every oil change and helps prevent leaks. Thanks to its texture, it renews the seams while maintaining their tightness, while ensuring the flexibility and flexibility of the material.

Remember to regularly clean the transmission well to minimize risks.

Also note that to prevent oil from leaking from your transmission, a check may be done during a periodic inspection of your vehicle. Each time you visit the car, ask the mechanic to do this check. Subsequently, this avoids unpleasant surprises.

Now you know what to do if you find an oil slick under your car. Simple doubt, go to Vroomly and its trusted mechanics.