How to Easily Break the Tail Seal

Breaking the tail seal can be a daunting task, especially for those who have never done it before. However, it’s not as complicated as it may seem, and with the right tools and techniques, you can break the tail seal on your own with ease. In this guide, we’ll walk you through the process step-by-step, outlining everything you need to know to get the job done quickly and effectively.

What is a Tail Seal and Why Would You Need to Break It?

The tail seal is essentially a gasket that is fitted around the tail shaft to prevent any leaks between the transmission and the driveshaft. Over time, the seal can become worn or damaged, resulting in oil leaking from the transmission. This is not only an annoyance but can eventually damage your vehicle. That’s why it’s essential to know how to break the tail seal and replace it as needed.

Tail seal
Tail seal

Understanding the Tail Seal

Before breaking the tail seal, it is important to know what it is and what it does. The tail seal is a circular, metal-rubber component that fits around the tailshaft of the transmission system, sealing the gearbox in such a way that the lubricant does not leak out. It is designed to accommodate the movement of the tailshaft during acceleration, braking, and cornering, making it an important component of the car’s drivetrain.

Tools You’ll Need for the Job

Before you dive into breaking the tail seal, you need to make sure you have all the necessary tools on hand. Here are the tools you’ll need:

  • Safety glasses
  • Gloves
  • A new tail seal
  • A screwdriver or pry bar
  • A hammer
  • A socket wrench
  • WD-40 or other penetrating oil

Breaking the Tail Seal: A Step-by-Step Guide

Step 1: Prepare the Car

Park the car on a level surface and raise it using a jack stand or a hydraulic lift. Ensure that the gearbox fluid has been drained and that the driveshaft has been removed.

Step 2: Remove the Tail Housing

Carefully loosen and remove the bolts holding the tail housing to the gearbox. Use a scraper to remove any gasket material between the gearbox and tail housing.

Step 3: Remove the Tail seal

Using a seal puller, gently remove the old tail seal from the tail housing. If the seal is stuck, use a hammer and a flat punch to tap it out.

Step 4: Install the New Tail Seal

Carefully place the new tail seal in position, ensuring that it is seated correctly. To do this, apply a small amount of transmission fluid to the seal lip, which will help it slide over the tailshaft.

Step 5: Re-Install the Tail Housing

Re-install the tail housing, ensuring that the bolts are tightened to the correct torque specification. Finally, re-install the driveshaft and fill the gearbox with the recommended fluid.

Testing the New Tail Seal

Once the new seal is installed, it’s time to test it out. Reconnect the driveshaft to the transmission output shaft, ensuring that all bolts are tightened securely. Turn on the engine and let it run for a few minutes, then check for any oil leaks. If there are none, congratulations! Your new tail seal is installed.

Common Mistakes to Avoid

When breaking the tail seal, there are a few common mistakes that you should avoid. These include:

  • Forgetting to drain the gearbox fluid before starting
  • Not removing the driveshaft before starting
  • Installing the new tail seal incorrectly
  • Overtightening the bolts on the tail housing
  • Not torquing the bolts to the correct specification

Tips for Breaking the Tail Seal

Breaking the tail seal may seem like a tricky task, but with the right tools and techniques, it’s a job that even beginners can handle. Here are some tips to keep in mind:

  • Always wear safety glasses and gloves to protect your eyes and hands from flying debris and sharp edges.
  • Use WD-40 or other penetrating oil to help loosen any rusted bolts or fittings.
  • Take your time and work carefully to avoid causing damage to the transmission or driveshaft.
  • If you’re having trouble removing the old seal, use a hammer to lightly tap it out. But be sure to gently do this to prevent any damage to your transmission or driveshaft.
  • Make sure to test the new tail seal for leaks before putting your vehicle back on the road.


Breaking the tail seal is a necessary maintenance task that any vehicle owner may need to undertake at some point. By following the steps outlined in this guide, you can easily break the tail seal and install a new one with confidence. Just remember to take your time, use the right tools, and work carefully to avoid causing any damage. With a little patience and practice, you’ll be breaking the tail seal like a pro in no time!

FAQ – How to break the tail seal?

1: What is a tail seal and why does it need to be broken?

A tail seal is a small plastic tab that covers the adhesive strip on the back of some products, such as batteries or electronic devices. It needs to be broken because it is preventing the adhesive strip from attaching to the surface.

2: How do I break the tail seal?

To break the tail seal, locate the small plastic tab on the back of the product. Gently pull or peel the tab away from the product until it breaks or comes off completely. This will expose the adhesive strip, allowing you to attach the product to the desired surface.

3: What should I do if I can’t break the tail seal?

Some tail seals can be difficult to break, especially if they are made of sturdy plastic. If you are having difficulty breaking the tail seal, try using a small pair of scissors or a knife to cut away the seal. Be careful not to damage the adhesive strip or the product itself. If you are still having trouble, contact the manufacturer for assistance.

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