What are Transmission Lines?

Transmission lines are a key part of your car’s transmission system, and they play a role in keeping the transmission at a safe temperature. They’re actually pretty simple. Here’s how the transmission cooling system works: transmission fluid, which acts as a coolant, circulates around the transmission. While there, the fluid absorbs heat from the transmission, which helps keep the temperature of the transmission down. That’s good for things like…well, your safety. The transmission fluid then travels back to the transmission cooler, which is often located in the radiator. The cooler is a heat exchanger that removes heat from the transmission fluid. Once the fluid has dropped in temperature, it returns to the transmission to absorb more heat, and the cycle continues repeatedly. Now, you can probably guess how the transmission fluid travels from the transmission to the cooler and back again, yeah? I mean, you did just click on an article about transmission lines after all. In general, your car will have two transmission lines: the supply line, which sends the fluid to the cooler, and the return line, which…well, returns it. Usually the transmission lines are made of steel, but sometimes they’re made of rubber. And in general, transmission lines only exist in cars with automatic transmissions.

How urgent is a Transmission Line replacement?

The longer you go without replacing your broken transmission lines, the less fluid your transmission will have. The less fluid your transmission has, the more damage will be done to your transmission. The more damage your transmission has, the more stress it puts on the engine, and the more damage is done to the engine.

Want to know how this ends? Hint: it involves writing a very big check.

Do the smart thing. Get your transmission lines replaced.