![]() The accompanying graph shows a return and feed line for each transmission. Various Transmissions Have Varying Transmission Cooler Flow Directions You may locate it by searching online, purchasing a repair manual for your particular model, or seeing whether your transmission is listed in the list below. Next, you may locate the cooling hose attachments on your gearbox and trace them back to the cooler to verify the cooler flow direction. And if you choose this approach, the cooler line feeds the cooler, while the hotter line returns fluid to the transmission. Instead of using your hands, you might purchase or rent a laser thermometer. You can determine which hose is warmer by touching them, but only when the engine is completely cool since these hoses may burn you. You may also check the hose temperatures to see if the cooler is already mounted on the car and working. Moreover, if you just purchased an aftermarket cooler, you may look up the flow direction in the handbook that came with it. In other situations, a hose or hose fittings may be colored blue and red, in which case the blue would travel to the transmission, and the red would flow to the chiller. For instance, the flow might be indicated by in and out or inlet and exit adjacent to the hose attachments. You may thus check to see whether there are any marks adjacent to the hose attachments to prevent making a mistake. However, some coolers feature an inlet and an exit on the top of the cooler, which contradicts our previous hypothesis. That’s only a generalization, so it may be the other way around in certain circumstances. The fluid entering the transmission is on the cold line, while the fluid leaving the transmission is on the hotline. ![]() The top hose connection on the transmission cooler is the hotline, and the bottom is the cold line, as previously described. The direction of Flow for the Transmission Cooler Therefore you must verify your particular transmission. No standards govern whether the line is the feed or return on the transmission side. And that is the flow direction for the transmission cooler. Most of the time, the cooler’s bottom is the cooler return line, while the cooler feed line enters the cooler from the transmission (flowing from the cooler into the transmission). But first, a brief response to the basic query before we go into more depth and cover all the major broadcasts. Thus we will discuss the various transmission cooling methods and the flow direction. This is because as soon as the transmission fluid overheats, it loses its ability to lubricate, which may quickly cause your gearbox to fail.īut, if the transmission fluid is excessively cold, the same thing occurs. Also, the temperatures of the transmission fluid might become a serious issue if you race or tow your car. Maybe surprisingly, even during routine driving, the automatic gearbox fluid heats up much more than engine coolant.
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