Have a Be Cool a/t radiator & after I tightened the tranny lines to the cooler on the radiator it won't stop leaking. Removed them & compared the opening to the stock radiator I removed & noticed there is a washer or disc in the old radiator cooler opening & in the Be Cool just a hole. Is there a fitting where the flared end of the tranny lines would stop that I can buy at the local lowes?

You may have to install an adapter for the interface between the tank fitting and the fare nut.

Probably a female pipe thread in the tank fitting to a male flare. Could be straight thread in the tank fitting, as in an O-ring sealing required.

Have you asked BeCool about it?

I just searched their site & it shows a fitting for the tranny coolers. Don't know why they don't include them. it says 1/4" by 5/16 inverted flare fitting. Couldn't find that size at lowes.

I just searched their site & it shows a fitting for the tranny coolers. Don't know why they don't include them.
So they can get more money....

So they can get more money....

That I knew was the reason, just figured for the amount of money the radiator cost they could do a little good will gesture.