Which cooler line is the return on the AOD?

The Shape · May 27, 2004

Going to install my B&M cooler tommorow and I need to know which line is the return to the tranny. Is it the one at the top or the bottom of the radiator? I assume it would be the bottom one letting gravity help the tranny pump the fluid through the radiator, but figured I would ask to make sure. Thanks

davs5.0 · May 28, 2004

Bottom one, but you can route the lines any way you want if you are bypassing the rad and just using the cooler

Js5ohLX · May 28, 2004

It's better to bypass the stock cooler, don't use it.

87VERT · May 28, 2004

Agreed...bypass the stock cooler all together.

The Shape · May 28, 2004

Actually I was advised by a tranny shop to run them in series so that the fluid wouldn't be overcooled on those 20* degree days this winter

Mustang John · May 28, 2004

Yes, the AOD return is the lower fitting on the transmission. The AODE/4r70w return is the upper fitting. Look to the trans for this as someone "may" have altered the lines at the radiator somehow.

I personally run my B&M in series with the OEM cooler in the radiator. I just do it to get more cooling capacity for the most part. I supposed the cold day thing is a concept, but, they generate enough heat to take car of themselves I think.

We often run coolers on their own when the radiator unit has clogged or is contaminated to where we worry about some material possibly breaking loose at some point and getting into the trans.

davs5.0 · May 29, 2004

Its only May, bypass the rad for now and hook it up in the winter. You don't want the 180 degree or higher rad warming the trans fluid or the hot trans fluid adding to the rads heavier load with the ac etc.

Js5ohLX · May 29, 2004

Yeah, you won't ever convince me it's good to run the stock cooler. Nothing but problems.

Michael Yount · May 29, 2004

I think you're on the right path provided you locate the new cooler out of the airstream of the radiator/condenser (under the car). Run hot fluid from the tranny to the new cooler first, then to the radiator cooler, then back to the tranny. In hot conditions, you'll knock most of the heat out with the new cooler significantly reducing the load on the radiator. When in traffic (no air moving across the new cooler) your radiator connection will provide enough cooling for you to keep the tranny happy. In the winter, if your new cooler is 'overcooling', your radiator core will put some heat back into the fluid for you. I think that's a very elegant solution if you're not gonna run some kind of t'stat to keep from overcooling the fluid.

mrf0rd · Jun 3, 2006

I reactivated this old thread. Does anyone think that there would be a problem with running rubber for the AOD cooler lines? Should 3/8 do the trick?

Killa Klown · Jun 3, 2006

I installed a cooler a few weeks ago, I got rubber hose from advance auto, good quality goodyear hose, stamped right on the hose "transmission cooler" as long as it is high heat hose, you should be good

Mustang John · Jun 3, 2006

Yep, that sort of hose is exactly the thing. Just use GOOD quality clamps and flare the end of the metal tube slightly..

Which cooler line is the return on the AOD?

The Shape

davs5.0

Js5ohLX

Member

87VERT

The Shape

Mustang John

davs5.0

Js5ohLX

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Michael Yount

Mustang Master

mrf0rd

Killa Klown

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Mustang John

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Which cooler line is the return on the AOD?

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