Tranny cooler lines - which is which

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GEN3Typhoon

New member
Well I have searched for about 20 minutes and I canot find it .. so I am going to ask.

I need to know of the tranny fitting coming out of the tranny... which is the feed and which is the return... top one? bottom one?

I know this has been asked 100 times... I am putting in the summit filter and it says that it is critical that it is on the right one.

My thinking is that the top was the feed and the bottom was the return.

Have not checked the ATSG manual yet.. on my way to do that.

TIA
 
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GEN3Typhoon

New member
Thanks for that link... but I am putting a filter in it and it says that it is critical that it goes on the correct line.. so I need to know which on the tranny is return and which is feed... I am sure the ATSG manual has it.. I just thought someone here would know off the top of thier head.
 
Falco

Falco

Donating Member
Nick,

Maybe I misunderstood your question, but as I sad the upper tranny oil line is the return line (cooler) and the bottom one is the tranny cooler's feed line (hoter). So the upper ports both on the tranny's case and on the radiators belong to the return line.

HTH,
 
Loeryder

Loeryder

New member
Upper port =Return
Lower port =Feed

So does the filter go on the feed or the return line?

I would think put it on the feed line with the temp sensor in it to get hte best filtering and temp readings right out of the trans.
 
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GEN3Typhoon

New member
Actually I will have to look at the instruction again... I will let you know.

I appreciate the info....

Thanks again.. incidentally I don't need the carbon fiber temperature gage that I bought as the tranny computer has the sensor built in...

So I have a brand new gage and sensor setup I will sell to someone cheap.
 
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GEN3Typhoon

New member
Falco... sorry you are right it was there.. it just said radiator went back and I did not read that the first time as meaning that was the return.. my bad.
 
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Blake

Guest
The instructions in that kit are misleading. It is actually showing the radiator from the top but turned on its side as if the end tanks were on the top and bottom. Look real close at the direction of coolant flow on the adaptor itself that the filter screws onto. If you hook it up backward, the spring loaded valve in the filter will slam shut and cut off almost all coolant flow. Cruising around the neighborhood won't be a problem but as soon as you hit the freeway, it'll cook real quick.

They've said it already but the TOP on the tranny itself is the RETURN.
The BOTTOM fitting on the tranny flows OUT to the cooler. Just to show concensus.

I've talked to several people that have installed them backward and it did the same thing every time.

If you have never experienced a failure with the cooler you are using, put the filter before the coolant gets to the cooler. If you have ever experienced a failure with the cooler you are using, put it AFTER the cooler. That way, any crud that breaks loose from the cooler STAYS in the filter. You seem to tend to go all out when you do your stuff up so my bet is that your cooler is probably new :wink:
Blake
 
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Blake

Guest
Hey Keith!
That looks sweet! When you use that type of hose, make sure your bends aren't too tight(not saying that yours are). Some hoses say 6" radius, some say 3" radius. Just something else to be aware of. I've seen pics of examples all over the net that are way to tight of a bend.
I'm diggin that hood!!
Blake
 
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GEN3Typhoon

New member
Interesting.. I put mine in last night... I mounted the tranny cooler, which is 7.5 x 15 and 1.5 thick along the frame rail on the drivers side in the back of the truck.. fabbed the mounts last night.. will probably get it up there tonight and run the lines. Added a 400 CFM fan that is controller along with the engine fans by the FAST ECU.. should be nice.

I appreciate all the information..
 
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