Hayden Automotive 397 Transmission Fitting Review

I used this to add a transmission cooler to my 2013 Chevy Suburban and it was literally a breeze to install but to be honest I think so it is quite expensive for a short piece of pipe.

Good adapter, fits perfectly. I flushed the old Dex VI and replaced it with a new one. The 3/8" hose worked great too. It's difficult to work in a small area by removing the clamp on the radiator, but the old fluid was flushed out with minimal mess.

I change the transmission filter every 70,000 as recommended, but disconnect the return line and change the fluid about every 30-40,000 or so. This makes the ENTIRE process a breeze. Worked on my 12 Chevy and 2002 Dodge.

Fantastic. Great for flushing transmission fluid on my 2003 Suburban. Plugs directly into the top (bottom) radiator fitting. Empty and refill the drip tray (3 litres). Then secure with a vinyl hose, turn on the engine, let it pump out 1 liter, turn off, pour in 1 liter, repeat. Simple process

This adapter was used to flush the transmission on a 2002 Chevrolet Suburban. Connect it to the upper transmission cooler line on the radiator, start the car and fluid will come out of your transmission. After 12 seconds, stop and pour a few liters into your truck. worked perfectly. Be careful or you will lose the small spring clip that secures this adapter to the transmission cooler. There are many videos online on how to do this job.

Replace the coolant line on the upper left side of the radiator (on the left side when looking at the car grille). Use 3/8" ID clear hoses. Start the engine (in park position) and allow the coolant to drain out for about 10 seconds. Describe later. Turn off the car. Refill the transmission. Repeat. You may also run the engine until bubbles appear in the lines, stop the engine, remove the sump and prevent the liquid from splashing all over your face (I might as well leave the drain plug on for…