Originally Posted by diyanich

Hi

#1 is a front differential breather/vent

#2 is a transmission breather/vent

#3 needs to be blind(plugged)

#4 is a nipple that connects a tiny line that connects to the Oil Separator oil drain pipe that goes to the the lower oil pan.It's actually a couple of pipes.Tiny one is crucial for membrane operation.

I am sure that your line was old and slipped off when you removed the CCV.