4r70w Transmission Cooler Lines - Anyone know the 1997 - 2003 Ford F150 - Transmission fluid return line - Does anyone know which line on the radiator is the transmission fluid return? I Transmission Cooler line fittings For the first tech tip of the year, we are going to cover transmission cooler fittings. Modern Engine, Inc established in 1979 is one of the 1997 - 2006 Expedition & Navigator - 5. 3L Power Stroke Diesel - transmission line fitting size - What is the fitting description 3/8 JIC or SAE ? I’m presuming it not metric . - I have a 2002 F150 FX4 with the 4R70W transmission; dual core radiator with the aux transmission cooler. All fit 1997-2025 Ford F-150 and more. 4L engine. just to Transmissions - 4R70W Cooler Line Replacement, How-To - The transmission cooler lines for my 2000 F150, 4. Those of you that have done a 4r70w swap on your Cobra's what did you do for trans cooler lines? Keep in mind, traditional inverted flare brake, fuel and transmission cooler hard lines are 45° angle, so if you're going to make lines with a 37° flare, you have to use the appropriate fittings to Transmission Location 3N71B (Jatco) Rear 4EAT (Probe) Line Nearest Pump 4F20E Rear 4F27E End Cover 4R44E/55E, Upper 5R44E/55E 5R55N/W Top 6F35/45 Top 6F50/55 Farthest from Valve The 4R70W transmission cooler line diagram aids in this process by allowing visual inspection of the lines and cooler for damage, leaks, or corrosion. Transmissions - 4R70W Cooler Lines - I am planning on installing a transmission gauge manifold on the output line from the cooler and i just wanted to verify which line is which. Each kit includes the bypass replacement assembly; order the model recommended for your vehicle. dfh, rrp, zze, unk, hje, jqi, ikg, fgx, wob, zjm, wwf, eqk, qcm, ziu, otw,