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On a G M 350 transmission which cooling line is the inlet and which is the outlet?
Wiki User
∙ 17y ago
The lines are easy to find, they will be the only two steel lines coming from the area of the transmission to the radiator (just make sure you are looking at the radiator, and not the condenser - the steel lines going into the condenser are for the AC, and go from it to the compressor). The tranny fluid lines have threaded connectors that are easy to disconnect. First disconnect whichever one is easiest to get to, and then disconnect the main distributor wire, and have someone turn over the starter a few turns while you watch where you disconnected the tube. If tranny fluid flows out of the radiator, you have the outlet, if it flows out of the tube, you have the inlet (and if what flows out is not tranny fluid, you have seriously gotten the wrong one. If it is the wrong one, connect it back up, and disconnect the other one. Another way is to feel of the lines after you start the engine. The line that gets the hottest the quickest is the inlet. If you're feeling brave you can start it cold and drive it around the block and then feel which one is hot and which is cooler. The hot is the out and the cooler is the return line. One could assume the upper hose in a tranny cooler is the out and the lower the return but who knows how it was installed. I'd also check TH350 images in a Google search and you might find a illustration with more detail...or ask someone selling one on Ebay. Think differently!
Wiki User
∙ 17y ago
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