4L80E Cooler Fitting, For AN, see 831012 and 831011., 4L80E 9/16 - 18 Cooler Fitting Kit, This TCI Cooler fitting kit is perfect for taking your 4L80E cooler fittings to 9/16-18., Our TCI Transmission Cooler Fittings are Perfect for Plumbing your Transmission Oil Cooler., Pipe Fitting.