Im putting on my Tranny Cooler tomorrow and was wondering what a good brand of transmission fluid is for my car? Also does anyone know the size of the tubing needed with the cooler. I have the 4 feet that came with it but need 4 more feet and it doesnt say what size the tube is. I have the Hayden 403. Last thing I dont know what brand of Transmission Fluid is in my car now will it matter if I get a different brand? There really isnt any way of finding out what brand is in there. Thanks

 

Any Dextron III ATF will work just fine.

 

For conventional fluid, the Nissan is best. Best fluid though, is synthetic. Take a piece of the hose that came with the cooler, and let them match it at the store.