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Impala Transmission Cooler Line Leak

2:46 pm ATF Fluid Leak, Chevrolet


© Summary: Quick connect transmission cooler lines allow for quick assembly at the factory. Problem is the tiny o’ring inside the coupler can cause ATF (automatic transmission fluid) leaks.

Here’s my wife’s car again. Her car has been the subject for my blogs too many times! After noticing a puddle of transmission fluid on the garage floor, I suspected a leaky cooler line. I wasn’t sure if it was the line itself or an adapter fitting. When it was time for the oil change and I was underneath for that; I plainly saw that the transmission fluid leak was thankfully just the fitting. I went to our local Chevrolet dealer to get a new fitting. I’ve dealt with getting car parts long enough that I knew I should take the old fitting with me.


The type of fitting is a “Jiffy Tite” Line Connector. The Jiffy Tite Disconnect tool is great for technicians that have to deal with these type of lines a lot. Since I seem to have misplaced mine or maybe I loaned the set out… I used a pick to remove the spring clip. These little clips are really easy to lose. They can shoot off into any direction! If you are not reusing the old fitting don’t worry though; The new fitting comes with a new clip already installed.


Even though I went to the dealer to get the part – it looked different. It’s common for aftermarket parts to look different from the original equipment, but most of the time OE (Original Equipment) parts will match closely. Turned out that part, although it looked different was correct. It seals at two o’rings. There’s one inside and the one that can be seen in the picture above. The shorter length at the bottom of the fitting had no bearing on fitment of the part. So this was an easy fix and there’s no more slippery slicks on our garage floor!

Be sure to check out our other articles and visit the automotive tools website when you have the time.

2 Responses
  1. Alex Ayon :

    Date: December 16, 2012 @ 7:50 pm

    What is the part number for the fitting for a 2007 3.5L Impala?

  2. dennisb - Auto Tool Sales :

    Date: December 17, 2012 @ 7:07 am

    Alex, we don’t have a book to look up the fitting. A call to the local Chevrolet dealer should work though. Good Luck.

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