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Re: Tranny cooler question
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When the ATF is cold, the bypass valve sends it right back into the back of the tranny instead of to the coolers.
Tecnhically, the bypass valve works on pressure, not temp. But the effect is that hot ATF goes to the coolers and cold ATF bypasses the coolers and goes right back into the rear of the tranny. [img]/ubbthreads/images/graemlins/warmsmile.gif[/img]
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Almost but not exactly correct. You are correct about the mess but there is still fluid going to the cooler when cold. The colder fluid doesn't flow as easily so there is more volume being pushed thru the bypass valve. This is the same principle as the oil pump relief valve in your engine. Does the oil bypass the engine bearings and go straight back to the oil pan when it is cold?
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2000 F250 Lariat CC SB 4x4 PSD Auto
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