Skip to Content

Fixing Jeep Wrangler Oil Leak Between Engine and Transmission

Oils leaks are common in most vehicles. It is the same case for the Jeep Wrangler. However, unlike most other vehicles, it is pretty easy to fix the issue and eliminate this tyranny.

In a nutshell, all you need to do is drain the engine and replace the gasket with a new one. Finally, make sure to tighten the screws and valves as they can also leak the oil. 

However, that is not all that you need to follow. In this article, we will cover everything you need to know about fixing leaks between the engine and transmission for your Wrangler. So buckle up and continue!

What Causes Oil Leak Between Engine And Transmission On Jeep Wrangler?

There are several root issues at hand that can cause the oil to leak between the engine and transmission on your Jeep Wrangler. We have compiled and stated some of them below along with their brief description.

1. Broken Gasket 

Gaskets are the essential component needed to store the oil in your engine. It is common for this gasket to break, rust, or come loose after some time. 

Once the gasket turns faulty, you will find that the oil is overturning through the bottom of the tank. Additionally, you may also notice the formation of oil puddles. 

2. Faulty Position of Filler Caps

Filler caps are just as crucial as gaskets when it comes to storing oil or petrol in your Jeep’s engine. 

As time passes and the Jeep goes through many vibrations, this can cause the filler cap to move from its original position. 

This is when the fluids start to leak out of the engine. Eventually, the oil can also cause incomplete combustion in the Wrangler. 

3. Overfilling Oil

Often the result of leaking oil might not be due to broken gaskets or faulty components related to the engine and transmission. However, it can be due to specific human errors. 

Filling the engine gasket with too much oil is one of the most common human errors that result in leaks. However, unlike other problems, you will not need to worry about any other side effects related to this issue. 

4. Worn Out Oil Filter

Time constraints are one of the most important issues that no component can avoid. The filter lies in the same case as well. As time passes, the filter used to filter out the oil and remove contaminations in the engine can wear out. 

When this filter wears out and stops working, the oil will start to leak. Additionally, you will also notice the pressure on the inside of the engine to fall below standard value. 

How To Fix Oil Leak Between Engine And Transmission On Jeep Wrangler?

It doesn’t matter what the source of the problem that is causing oil to leak out of your Wrangler’s engine is. No matter what it is, they can always be fixed. 

All you need to do is follow the following steps that we have listed below. Do note that not all actions might apply to you since we have only included a general procedure. 

Step 1: Open the front cover

Firstly you must open the front of the engine and make sure to switch off all power supplies, including the battery. This is a safety measure to prevent you from getting shocked. 

Step 2: Find the Source Of the Leak

Inspect the vehicle and engine to find out where the leak possibly starts. 

You can start from the oil pan seals and move on to the plug. In addition, you can also check the oil pressure on the engine to notice if there are any changes. 

Step 3: Fix The Leak

Make use of hand tools, torques, and a car jack to fix the leak. Begin by jacking the car up so that you do not have the bead down. Use additives to remove the oil-formed puddle that already exists on the engine.

Then check for loose bolts and screws. Tighten them back. Once tightened, check out the gasket and filler caps for wear and tear. If you find scratches, replacing these components with new ones is better.

Step 4: Test Out

Once you have managed to fix all the leaks, it is time to test out the Jeep Wrangler. You can fill the engine with oil to the right amount. Close the front cover after powering up the battery. 

Power up your car and drive it for a couple of minutes. Nothing should happen in these few minutes if you have fixed all the leaks. 

If you notice white smoke from incomplete combustions, then you might have missed out on something.

Is It Worth Fixing Oil Leak Between Engine And Transmission On Jeep Wrangler? 

You might think that low-level leaks aren’t worth much of a hassle. You might be right up to a certain extent since low-level leaks are usually due to certain human errors. 

However, in the long run, no matter what sort of leak you encounter in the future, it is definitely worth fixing. Not only are these oil leaks a menace to nature it is also a significant source of pollution. 

For instance, when there is a significant leak on your engine, you might notice white smoke coming out of your Jeep’s front. This is usually due to the incomplete combustion caused by dried-up oil leaks. 

Not only is this harmful to the environment, but it can also prove to be deadly for the driver and passenger. As such, it is vital that you fix any leaks as soon as you notice them. 

If you can’t do it yourself, then hire a mechanic. Although do note that you might need to pay a lot to the mechanic since inspecting and looking for leaks is a complicated task. 

How Much Does It Cost To Fix Oil Leak Between Engine And Transmission? 

What you will pay to fix the oil leaks between your engine and transmission will largely depend on how you want to fix it and whether you will be the one to fix it. 

For instance, if you are going to fix the leaks yourself, you will not be required to pay for any labor costs. The only thing you might need to pay for is the cleaning tools, additives, and extra components, which are usually about 150 to 500 USD. 

On the other hand, hiring a professional mechanic will require you to pay a labor cost of 85 to 150 USD, depending on the mechanics’ brand. 


Jeep Wranglers have very extended longevity. However, some core faults with specific models can ruin your journey if you do not take care of them. The leaking engine is one of these unavoidable problems. 

While you can fix it yourself, we should advise you to go to a mechanic for a fail-safe inspection. This is because running the diagnosis to find the leaks is challenging for amateurs. 

While hiring mechanics will cost a lot of money, it is entirely worth the price if you can improve your driving conditions. If you don’t, you might have to regret it later on.

Related Posts: