Going to flush my trans, how do I identify the return line?

[snow4me]

I'm going to attempt the same procedure the F250 guys do on my other forum I hang out on. Thanks!

[MY1PATH]

get 2 buckets ( prefer soda bottles) stick a hose in each one secure hose so it stays in bucket (tape neck of bottle).

start the engine for about 3 seconds and turn it off.

the bottle with less fluid in it is your return line.

[fleurys]

get 2 buckets ( prefer soda bottles) stick a hose in each one secure hose so it stays in bucket (tape neck of bottle).

start the engine for about 3 seconds and turn it off.

the bottle with less fluid in it is your return line.

 

 

Bravo ! Would never have thought of this one...

[muddfildvaynes]

Yeah I need to flush mine also, its been awhile and my fluid is brownish....

[Towncivilian]

Let us know which line is which! I'm wanting to install an in-line filter soon and need to know which side is the return line (and what size the hose is). It's all hard line up until the transmission cooler where there's a small length of rubber hose, so I'll need to install it there and secure it somehow.

[ANDY]

we use the wynns transmission flush machine at work at it dosent matter what line we use we hook one to the cooler and one to the trans