URGENT: Tranny cooler lines

[Hartman]

Hey guys, are these lines pictured below the tranny cooling lines? There on the drivers side of the radiator.

If so, which one is "in" and which one is "out"?

 

[Alec]

No picture, but yes they probably are.

Run the truck for a few minutes and then feel them. The cooler one is out.

 

[Hartman]

Duh, the picture:

 

[jjue]

I also suggest running the vehicle for a little while to see which one is hot, and that would be in. If I'm not mistaken, I think that the top on is in since I remember cutting into that one when I installed the tranny filter since I wanted to filter before the coolers and to monitor the transmission temperature before the coolers.

 

[Alec]

I beleive the top one is out, at least we went off the top one for my aux cooler install.

 

[Hartman]

So the top is the one that you splice into for the aux filter? I don't plan on making any cuts to the line.

 

[matt97]

On my 97 the top line is in and the bottom is out.I installed mine on the bottom (out) line.

 

[jjue]

Yep, after changing my thermostat not too long ago, I noticed that the top line is my input since my transmission goes to the filter before anything else.

 

[410Fortune]

Yes.....the upper line is the input to the radiator cooler from the tranny

The lower hose is the out from the radiator cooler to the input on the aux tranny cooler.

The output from the tranny cooler then goes back to the tranny

Same at the cooler (upper is in, lower is out)

An easy way to remember this is, think GRAVITY is your friend.
Fluid enters at the top and leaves at the bottom, this helps the pump push the fluid through.

When I converted my truck to auto I could never remember which was which and I had to keep looking at a friends EX.

I replaced the metal lines with high temp high pressure tranny rubber lines. I used a single flare tool and hose clamps, cut the stock metal lines about 4" after they leave the tranny and cooler. Works GREAT!!!

Hey while you are at it think about installing a larger tranny cooler, best insurance you can get!

 

[Hartman]

****, I just spliced the filter into the top line. I guess it's back to the garage tomorrow.

 

[410Fortune]

Why does it matter?

The fluid still flows through there.

Does the filter say to install it on the return line?

 

[Hartman]

The directions said to use the supply line (pressure line). It said to warm up the engine and feel both lines, and which ever one was warmer was the supply line. The top line felt warmer to me, so that's the line I used.

Now I'm confused.

 

[JDraper]

It'll work that way, just not as efficiently. Having the aux cooler after the radiator allows the heat left from the radiator to be bled off in the aux cooler. If you do it the other way around, it will never get much cooler than the radiator is running.

 

[Hartman]

I want to clarify, this is just a filter, not a cooler.

 

[aldive]

Originally posted by Hartman
I want to clarify, this is just a filter, not a cooler.

The filter will work in either line, however, if you plan on a tranny temp gauge, it will be best in the line to the cooler,

 

[Hartman]

Ok so I guess my question is, where should I put this to achieve maximum results? The top line (out) or the bottom line (in)? I do plan on running a tranny temp gauge in the future.

 

[MONMIX]

I am gonna assume you got the Perma-Cool system ?

I have it too and I am well pleased.

Yeah the big dif is gonna be in the temp sender.
How ever, obviously the filter MUST be run in the correct direction.

 

[Hartman]

No I don't have the Perma cool system. I just have the basic remote tranny filter kit from Summit.

 

[jjue]

There isn't much of a difference in the Perma-Cool an the Summit kit from what I can tell other than maybe price and tha the Perma-Cool kit might have come with a hose or something since there was a specific reason as to why I bought the Perma-Cool over the Summit kit that I don't recall. Either way, I was going to have to buy a shorter filter. I have my filter inline to the radiator since I wanted to see the transmission temperature before the fluid got to the cooling system, not after; therefore, I went to the top line. You did right, but be sure that your flow to/from the filter is in the right direction.

 

[Hartman]

Everything was installed per the directions, I just wasn't sure if installed it in the right line. You cleared that up for me, thanks.

Another note, the Summit kit I went with came with hose, but I needed another length to reach the filter location. I bought heater hose for this (for fuel also), and it looked identical to the hose that came with the kit. Is this going to be OK?