How much does it cost to fix a transmission line?
Emily Baldwin
Updated on March 28, 2026
How much does it cost to fix a transmission line?
Like all parts of an engine, transmission cooling lines can wear out. If they break or develop a leak, you will lose transmission fluid, leaving your car vulnerable. Thankfully this is a fairly simple fix, and most transmission line repairs cost between $100 and $500 dollars.
How do you stop a transmission line from leaking?
If you discover a leak from a gasket or seal in your transmission, the best way to stop the leak is to simply add BlueDevil Transmission Sealer to your transmission fluid.
Does it matter which transmission cooler line goes where?
Generally the higher line on the radiator has fluid going INTO the transmission and the lower one goes back to the transmission, so the higher line has fluid coming out of it and the lower line sucks it back into the transmission.
Can you fix a transmission line leak?
The average cost to fix a transmission fluid leak that can be solved without removing the transmission is $150 to $200. This includes small repairs such as replacing fluid lines, gasket, seals, drain plugs or pan bolts. The cost depends mostly on where the leak is.
What happens when your transmission line breaks?
If your car’s transmission lines are damaged, they will leak, and that can lead to serious trouble if you don’t notice your car bleeding transmission fluid. Your transmission is overheating, or you notice an unpleasant burning smell.
How do you know if your transmission line is leaking?
How to Tell If Your Transmission Is Leaking Fluid
- Check the Dipstick.
- Dashboard Warning Light.
- Fluid Leaks.
- Grinding Gears.
- Clunking Sounds.
- Strange Vibration.
- Burning Smell.
- Delay In Acceleration.
What happens if you put transmission cooler lines backwards?
You may want to flush the lines and or cooler- if the lines are backward you could have dislodged some debris and it is working like a check valve.
How do I know which transmission line is my return line?
The lower line near the bottom will be the return line.
What happens when a transmission line breaks?