This lady had a misconception as to the proper way to cool down her Jeep, not to mention she had SFB syndrome.

http://news.yahoo.com/blogs/oddnews/...215138173.html

Being able to monitor fluid temp, as PocketsEmpty is able to do, is the correct/safe way to run a stand alone tranny cooler, when bypassing the OE tranny cooler. I doubt cold ambient temps will be an issue at all.

I doubt so as well. And here's a tip, fellas. It's really easy to monitor the trans temp without putting the work in to put a gauge in (although that is in my plans). Use an IR thermometer, point it at the tranny pan after a nice drive.

One thing u gotta remember, the tranny pan holds the "cooled" fluid that has just returned from the cooler. Taking a temp reading at the pan could be giving some misleading info. Kinda like engine coolant....the coolant temp reading is taken at, or close to, where the hot coolant exits the motor.....not where the cooled coolant enters the motor.

Good point that I didn't consider. I'll get the real story when I hook a gauge up.

Want to get my ducks in a row here. I'm going to run my B&M cooler inline after the factory cooler. Pulled the belly pan from under the front of the engine for a look see. The line I want to use goes from the front of the trans (pump) to the top of the radiator? Also I believe I'd rather use the metal part of the line rather than the rubber part. OK?

^ After reading technical information and service bulletins regarding the AW4 (the most informational are not Chrysler related, they are from or related to Asin-Warner) here is what I retained..

The issue with running 'too cool' has to do with premature wear on the clutch packs.

Route fluid to the auxiliary cooler first, then the stock cooler in radiator (which is not a cooler but a heat exchanger). Here is why; The AW4 makes large amounts of heat. By running the auxiliary first, excessive heat is removed from fluid. Fluid then travels to the stock heat exchanger where additional heat can be taken out OR added. This helps keep the AW4 in its operating range.
The engine makes enough heat for the radiator to deal with, add hot tranny fluid to the heat exchanger that just came out of the torque converter and the radiator has to work that much harder. It makes a big difference in coolant temperatures when driving in adverse conditions...

^ The above post is for modified Jeeps, this thread is OEM. Oops.

That doesn't sound right.....the hot line (fluid exiting the the tranny) enters the rad at the bottom fitting. Cooled fluid exits the rad cooler at the top fitting.....and that's the line u want to splice the aftermarket auxiliary cooler into.

To be 1000% sure which line exits the tranny or which line is the return to the tranny, disconnect one line up front somewhere and place the 2 loose ends in jugs/containers.......start/run the motor for 2-3 seconds. 1 jug will collect a small amount of tranny fluid and 1 jug will remain empty. That method should tell u for positive sure the flow direction of the tranny fluid.

AW4 fluid-out is the front port on transmission (closest to pump). Rear port is return. Follow line to radiator to verify flow direction.

Might want to delete that.

The B&M #70264 has a built-in t-stat to aid in tranny fluid warm-up.

My rear trans line goes to the bottom of the radiator and the front line to the top.

Also found these:

"Here is how it works, your trans is operating in the 250deg range,the fluid goes into the radiator and is cooled down to engine temp(195-210),it then exits the radiator and enters the aux cooler and is cooled again before returning to the trans.
That is the way it goes,any different is wrong. For every 20 deg you lower the temp of an automatic,you double it's life."
Lee Crawford
http://www.tlctransmission.com



Chrysler

Transmission

Return Line Position

AW4 Jeep

Rear

That is the one I use, with the flow restricter, works by viscosity. Located in front of mechanical fan. Driving in deep sand overburdens that aux cooler if it is routed solo.

It's been 4 years since we did our cooler install and I'll admit, I've slept a little since then. U r going to splice the aftermarket auxiliary into 1 line or the other, so do the flow direction test in post #99 so that u r not taking anybody's word for it and making a mistake.

Do the flow test to see/verify for yourself, be 1000% positive and by all means, correct me if I'm wrong.