47re line fittings?
 

I need to replace my transmission cooler hard lines with -AN line becuase its rusted cracked and leaking. I already have added a aux derale cooler to it using compression fittings on the stock 1/2" tube but I would like to put _AN fitting directly on the trans. Does anyone know what -AN to what ever adapter fitting is needed for the cooler in and out lines?

I am pretty sure JKM knows the answer to this. Send him a PM.

I used a 1/2 in hard line to -8 fitting for mine. I think it was a Russell fitting. I have an extra still in package in the garage I'll check the part# later. I just left a short piece coming out of the trans that wasn't rusted and used these because I already had them. Worked good and after a year still hasn't leaked. Are you trying to get rid of all the stock line?

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Ok, I used a Jegs fitting part#100553. JEGS 100553 JEGS Hard-Line AN Adapter Fittings. I believe the thread in the trans case is 1/2 npt. I also used jegs push loc hose and AN fittings. You want to use -8 because that is equivelent to 1/2 like your stock line. JEGS AN to NPT Adapter Fittings - JEGS here are some AN to NPT adapters that would thread right into the case if it is 1/2 NPT. Hope this helps you out. Good luck with replacing the lines. I think I'm going to do the rest of mine since I have to work on the trans again anyways.