Which direction does the Tranny Fluid Flow?

[X~FACTOR]

I'm doing the remote transmission filter right now and I can't figure out which direction the fluid flows. I used and cut the fluid line near the top of the radiator.

I remember a couple of months ago that the bottom line that goes to the radiator flows in the radiator. This would mean the top line would be flowing out but it isn't coming out that way. What is up with this?

 

[matt97]

My X has all metal lines running from the tranny to radiator , I guess yours would be the same,I'am currently attempting the same project except adding an additional cooler also .From what i've read the bottom line is the return to tranny line.Did you just cut out a section of the metal line and add the rubber hose?

 

[X~FACTOR]

Originally posted by matt97
From what i've read the bottom line is the return to tranny line.Did you just cut out a section of the metal line and add the rubber hose?

Yes, I cut about 5" off the metal line and attached the rubber hose. So if the bottom line goes back to the tranny then the top line must be flowing going IN the radiator? Correct?

 

[matt97]

from what i have read the top line flows into the radiator and the bottom flows back to the tranny,i have not yet checked mine to see which way it flows so i'm not 100% sure,i suppose you could always crank the truck for a second or two and see if pumps fluid out of the top line towards radiator.If you do this let me know what u find so i'll know for sure.Good luck with your project!

 

[X~FACTOR]

Letting the engine crank a second or two doesn't do anything- no flows anywhere. Although after running the engine for atleast 10 seconds it started to flow in the direction of the radiator but that could be just gravity. It didn't flow with a lot of pressure as I expected. More like it trickled down.

 

[Nate1]

Uhh thats not good. When my cooler got a hole in it, it would leak heaps of fluid on startup, no delay. Mabey you have a blockage in a line?

 

[matt97]

I figured the fluid would come out with alot of pressure.
nweibley,does your tranny fluid flow the same as i thought?or was i wrong?

 

[X~FACTOR]

I did a search before this question (just like a good member should be ) and I read that for the tranny line to flow it has to have pressure. Well, I kinda like releived that pressure when I cut the line. Could this be the reason why the fluid is not spurting out?

 

[X~FACTOR]

I still need to know how this thing flows before I drive it 10 miles to home from a friend's house. Help guys, HELP!

 

[dogfriend]

Originally posted by X-factor
Yes, I cut about 5" off the metal line and attached the rubber hose. So if the bottom line goes back to the tranny then the top line must be flowing going IN the radiator? Correct?

If yours is like mine, I found that the top line is the hot ATF coming from the trans, the bottom line is the return line to the trans after it goes thru the cooler.

I verified this when I flushed my trans using the cooler line method. If you start with the lines disconnected from the radiator and the trans in Park, at first you will get ATF from both, but eventually you will only get ATF coming from one line, the top one.

I hooked up my ext filter by unhooking from the bottom fitting on the radiator cooler, routing a rubber line to my filter, from the filter to the aux cooler that I added, and then back to the metal line that I disconnected from the radiator cooler. So the ATF comes from the trans, goes into the top of the radiator cooler, out to Aux Filter mounted on LH frame rail , over to Aux Cooler mounted in front of radiator, back to bottom metal line and back into trans.

 

[X~FACTOR]

Good enough. That's what I did, flow wise. Thanks all.

I don't see the need for additional cooler though since it already has decent size factory cooler there.