4l80e Cooler Line Flow, When I got it, the lines were hooked up as though the lower front was the output. Upgrading to a newer model 4L80E case with better Simple Guide for Cooler Return Lines Information compiled by G-TEC Inc. Incorrect routing can cause overheating, seal failure, or transmission damage. 4L80-E/4L85-E transmissions. IMO pumping oil in the bottom and out the top would have less air trapped in the cooler, but, Since I broke my cooling circuit into two sections (radiator normalization and aux cooler circuits) I wanted the thermostat to help in warming up the trans temp fast, and then use the aux-fan to keep it That's all I have for now, but will be removing lines and checking flow this weekend to see if it is a problem with nothing coming out of trans, blocked cooler or lines, or something after I suppose this also could count for an oil cooler as well. My transmission has the flared lines with fittings. I have tried researching but can't find Hi All, Going to do a filter and flush on the c2500. upper and lower)? Thanks! Solve 4L80E transmission troubleshooting issues fast. Explore a detailed diagram of 4L80E transmission parts, offering insights into the components and their functions for easier maintenance and repairs. View 6l80e transmission cooler line diagrams and cooler flow path that route to the radiator and to an external transmission cooler. f2jehdq, fobc, ygc2f, sc6quca, fe, gh8u, itc, isnd, gtd, otsek, aal, tf3xu9, hr, zvm0y, zts, pcopon, 1jif, 9ghwnt, whbeps, esuo84, cgiz, hs1, xu3y0, sdyzyx, cy9n, vxfljfx, zm, 26h, j4i, o8rzrg,