sporter
12-31-2008, 05:36 PM
Which port is the output port on the 4L80E in the front? Front or rear port? Thanks!
https://static1.pt-content.com/images/noimg.gif
MarkB
12-31-2008, 06:59 PM
The 4L80-E shown is a early 1991 - 1996 design. So the lower fitting is the return from the cooler and the upper fitting is the output to the cooler.
If you ever run across a 1997 -up design where the cooler line fittings are seperated more, one cooler line is in the front of the transmission and the other is towards the rear. The rear fitting is the return from the cooler and the front fitting is the output to the cooler. (Just to add some information to anyone that may ever need it.)