Brandon from 840 Customs walks through the assembly of AN lines for the Buick's transmission cooler.

Step 1: Determine how long the lines need to be and mark the line with some electrical tape. We like to use red electrical tape to signify transmission cooler lines since transmission fluid is red.

Step 2: Use sharp bolt cutters or a cutoff wheel to trim the line in the center of the electrical tape. Some people like to take the electrical tape off before moving to the next step but we're fans of leaving it on. It helps keep the end of the hose from fraying during assembly. We haven't noticed it causing any issues like leaks or premature failure.

Step 3: Thread the nut onto the end of the hose. Remember the threads are reversed. The hose must sit on the seat inside the nut right before the threaded area.

Step 4: Thread the fitting into the nut. It's not easy, push hard to start engaging the threads.

Step 5: Tighten the fitting all the way into the nut until it is seated. We like to align the flats on the fitting and nut to make a cleaner look.

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