Transmission Cooler Line Leak at Radiator (Complete Guide)

✔ This article has been fact checked.

Transmission cooler lines are a crucial component in the functioning of your car's transmission system. These lines are responsible for transporting fluid from the transmission to the radiator, where it is cooled before being sent back to repeat the cycle.

A leak in the transmission cooler line at the radiator can cause serious issues, such as transmission failure, overheating, slipping and inability to change gears, and more. Thankfully, there are some obvious signs to look out for.

In this article, we will look the causes and symptoms of a transmission fluid leak at the radiator and the ways you can fix it. We'll also discuss the severity of this issue and other information you should know.

Table of Contents:

• What Are Transmission Cooler Lines?

• How Serious Is It?

• Symptoms

• Can Transmission Fluid Leak Into the Radiator?

• Can It Cause Overheating?

• Signs Coolant Lines Are Leaking

• How to Fix

• Still Leaking After Replacing Radiator

• What Happens if Transmission Fluid Leaks Into the Radiator

• Why They Go to the Radiator

• How They Connect to the Radiator

• How to Stop a Transmission Line From Leaking

• Cost to Replace or Repair Transmission Cooling Lines

• Conclusion