How To Cut Transmission Cooler Lines

transmission cooler lines on Chevy Silverado covered in rust

Transmission cooler lines are sometimes in need of replacement due to age(rust) or if you need to make an upgrade, such as installing a transmission cooler.

Whatever your reason for cutting existing transmission cooler lines, the job is easy as long as you know what you’re getting into.  Like with anything transmission related, it’s always best to have extra transmission fluid to account for any leaks, which will more than likely happen.

Once you’re all set with cutting and replacing your transmission cooler lines, be sure to check transmission fluid levels and fill to the correct level if needed.

There are a few steps you can follow to cut transmission cooler lines effectively:

  1. Determine the size of the cooler lines you need to cut. Measure the diameter of the lines using a tape measure or caliper, and use this measurement to select the appropriate size cutting tool.
  2. Choose a cutting tool that is suitable for the material of the cooler lines. Transmission cooler lines are typically made of metal, so you will need a tool that is capable of cutting through metal, such as a tubing cutter or a hacksaw.
  3. Secure the cooler lines in a vice or clamp to hold them in place while you cut. This will make it easier to get a clean, straight cut.
  4. Use a steady, controlled motion to make the cut. Follow the line of the cooler tube as you cut, and try to maintain a consistent cutting pressure.
  5. Deburr the edges of the cut lines using a deburring tool or a file to remove any rough or jagged edges. This will help to prevent leaks and ensure that the lines fit properly when they are reconnected.
  6. If necessary, use a flaring tool to create a flared end on the cut lines. This will help to create a secure, leak-free connection when the lines are reconnected.

By following these steps, you should be able to cut transmission cooler lines accurately and effectively. It’s important to take your time and use the appropriate tools to ensure that the lines are cut cleanly and safely.

Why Would You Need To Cut Transmission Cooler Lines?

There are several reasons why you may need to cut transmission cooler lines:

If the transmission cooler lines are damaged, they may need to be cut and replaced to ensure that the transmission fluid is flowing properly and the transmission is operating efficiently.

If you are installing a new transmission cooler or modifying the transmission cooling system, you may need to cut the transmission cooler lines to fit the new cooler or make the necessary modifications.

If you are replacing the transmission, you may need to cut the transmission cooler lines to remove the old transmission and install the new one.

If you are cleaning or repairing the transmission cooler, you may need to cut the transmission cooler lines to access the cooler and perform the necessary maintenance.

If you are upgrading to a larger or more efficient transmission cooler, you may need to cut the transmission cooler lines to fit the new cooler and make the necessary connections.

This video below demonstrates how to cut transmission cooler lines by using a cutoff wheel to remove the crimp that connects the line.