6l80e Transmission Cooler Line Diagram & Fluid Flow Path

6l80e transmission cooler line diagram


6l80 Transmission Cooler Flow Direction

The transmission fluid low of the 6l80 goes as follows:

  • Bottom line leaving the transmission to lower radiator port
  • Lower radiator to upper radiator port out to external transmission cooler
  • External transmission cooler to upper transmission cooler line port

If you do not have an external transmission cooler, the cooler line flow goes as follows: lower cooler line > lower radiator port > upper radiator port > back to upper transmission line.