Twin stock transmission coolers - Ford Powerstroke Diesel Forum
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Old 08-08-2012, 01:44 PM
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Twin stock transmission coolers

This is for my 2000 7.3 Excursion

On my 2003 7.3 F250 I have a 6.0 trans cooler installed, I plan on doing the major hauling with it 10k +, on the Excursion I want to pull a 18ft car trailer to Wisconsin next week, well I havent pulled anything with thing yet. Just got it about a month ago and have been doing all the maintance on it, if it had a fluid it's need changed if it was a filter it was changed.....EVERThing.

Anyways I have another NEW stock 4r100 trans cooler that I am wanting to install on top of the stock one in there and run them in series. If you flip the cooler upside down, you can attach it from the center attachment points, then the connectors will be on the drivers side of the radiator. Then connect them together.

Do you think this will be plenty for the old girl, should double the cooling capasity, or I was thinking about mounting another compact cooler under the frame with a fan on it. I like the idea but the simplicity of double stock coolers can't really be beaten.

Let me know your thoughts, my 2003 trans temps pulling 16k of trailer/cars runs about 170 with Texas average outside temps of 95-100. So 70f is pretty good
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Old 08-08-2012, 05:30 PM
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Sure seems like a lot of cooler to me. 70 over isn't bad. Once you get on highway and your tc is locked your temps will drop. May not need anything else
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Old 08-09-2012, 05:30 AM
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^^

This is for my 2000 Excursion, it has the stock cooler only!

I allways heard the stock cooler on the 4r100 wasn't enough for even light towing.

The 170F temp is on my F250 with a 6.0 cooler.
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Old 08-09-2012, 07:43 AM
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It is certainly better than just one. And you already have it.
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Old 08-09-2012, 07:58 AM
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I would be worried about too much cooling when you're not towing.
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Old 08-09-2012, 08:02 AM
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Quote:
Originally Posted by Macon View Post
I would be worried about too much cooling when you're not towing.
Mine still gets up to temp fine even with the dual coolers. But keeps it cooler when it is getting hot.
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Old 08-09-2012, 04:04 PM
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Quote:
Originally Posted by 2003_F250_FX4 View Post
^^

This is for my 2000 Excursion, it has the stock cooler only!

I allways heard the stock cooler on the 4r100 wasn't enough for even light towing.

The 170F temp is on my F250 with a 6.0 cooler.
I got u. Yeah ditch your factory cooler and get you another 6.0 cooler.
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Old 08-10-2012, 07:28 AM
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Quote:
Originally Posted by Macon View Post
I would be worried about too much cooling when you're not towing.
^This is right.


170* while towing is PERFECT. If your tranny doesnt get hot enough, your gonna have just as many problems as too hot. 220* is considered the max, and if your at 170* towing an 18ft, your fine.
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Old 08-13-2012, 05:16 AM
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If your going to mount that second cooler, don't mount it upside down. Could cause air bubbles in the system.
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Old 08-26-2012, 02:19 PM
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Just a update for everyone

Went on the trip, turned out about 3069 miles from driveway to driveway, temps with the twin stock trans coolers were 175f normal max of 191f in stop and go traffic

So I do think this is a good option, and much cheaper than a 6.0 cooler.
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