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Power Strokes
7.3 Aftermarket
Transmission cooler lines
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[QUOTE="Mark Kovalsky, post: 421113, member: 1654"] The factory bypass and the Tru-cool bypass have different functions. The factory bypass is there to bypass the coolers if there is a restriction. This preserves the flow to the lube circuit. The logic of this is that a trans can live for a while with no cooling, but it can only live for a few seconds with no lube flow. The Tru-cool can only bypass the coolers when it is cold. Once it reaches it's set temperature it opens, sending fluid to the cooler. If there is a restriction this bypass can't do anything about bypassing the coolers. [/QUOTE]
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