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SportTrac Discussion
Engine & Drivetrain
Transmission cooler in Radiator Failed
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<blockquote data-quote="Dreman" data-source="post: 1018004" data-attributes="member: 61303"><p>The main pump in the transmission picks up trans fluid from the pan, pressurizes it so the transmission can use it, and sends it to the radiator for cooling. There is an isolation chamber in the radiator that the trans fluid passes through that has coolant on the outside and trans fluid on the inside. Not only do they never meet, but the pressure of the trans fluid also never reaches the coolant. The trans fluid heats up the isolation chamber from the inside, dumping it's heat in the process. The coolant cools the chamber down at the same time from the outside. The heat from the transmission has now been transferred to the coolant, which is then cooled with all the rest of the coolant with the air passing over the radiator fins. Just like the outside air never touches the coolant, or it's pressure, the trans. fluid never touches the coolant. It's a separate system inside the radiator. When they meet, things go wrong, and the radiator has to be replaced.</p><p></p><p></p><p></p><p>When the transmission fluid has passed through the transmission, it's pressure is released, and done it's job, it is dumped into the trans. pan for filtering and re-use. The trans. pan is vented and is at outside air pressure, which is why the dipstick doesn't spray trans. fluid all over you when you pull it out.</p></blockquote><p></p>
[QUOTE="Dreman, post: 1018004, member: 61303"] The main pump in the transmission picks up trans fluid from the pan, pressurizes it so the transmission can use it, and sends it to the radiator for cooling. There is an isolation chamber in the radiator that the trans fluid passes through that has coolant on the outside and trans fluid on the inside. Not only do they never meet, but the pressure of the trans fluid also never reaches the coolant. The trans fluid heats up the isolation chamber from the inside, dumping it's heat in the process. The coolant cools the chamber down at the same time from the outside. The heat from the transmission has now been transferred to the coolant, which is then cooled with all the rest of the coolant with the air passing over the radiator fins. Just like the outside air never touches the coolant, or it's pressure, the trans. fluid never touches the coolant. It's a separate system inside the radiator. When they meet, things go wrong, and the radiator has to be replaced. When the transmission fluid has passed through the transmission, it's pressure is released, and done it's job, it is dumped into the trans. pan for filtering and re-use. The trans. pan is vented and is at outside air pressure, which is why the dipstick doesn't spray trans. fluid all over you when you pull it out. [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
Transmission cooler in Radiator Failed
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