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Old 11-30-2012, 07:33 PM   #1
Sportsman35
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Adding a Transmission Cooler

I am getting ready to put a new E4OD in my 94 Full Size Bronco with a 351w and I was wondering if anybody has ever added a trans cooler (which I'm sure someone has) and how much more fluid it would take and if it worked out well for you. I could find information about people replacing the cooler but nothing about adding a cooler. Thanks.
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Old 11-30-2012, 07:45 PM   #2
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E4OD Extended Fluid pan. REally worth it?

Aftermarket/Decent tranny cooler











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Old 11-30-2012, 10:39 PM   #3
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Can you just add another in line cooler?
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Old 12-01-2012, 01:21 AM   #4
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I put in one of these and my C6 loves it. For work I have to travel alot to Nevada in the summer and at times without the cooler the trans temp would exceed 220F. With the cooler in mid summer the trans temp stays right around 206. I also installed a B&M trans pan so that I would have a port for the temp sensor.

http://www.summitracing.com/parts/de...0/media/images

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Old 12-01-2012, 01:49 AM   #5
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Here's a pic of the install compliments of J.R. Nice. I installed mine the same way except I left my radiator mounted trans cooler inline also. See post #13 in this thread:

http://www.fullsizebronco.com/forum/...d.php?t=209473

Last edited by Glayd; 12-01-2012 at 01:51 AM.
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Old 12-01-2012, 09:40 AM   #6
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I like that set up but it being mounted back that far and pointed up does it pass air well? I know it has a fan on it but it just seams like it might pass more/better air and keep the fluid cooler up front. I seen in yalls posts that the lines run right by the exhaust but if it was up front by the radiator it seams like it would cool better with the wind and the fan hitting it that it wouldn't matter about the exhaust.
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Old 12-01-2012, 09:59 AM   #7
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I used steel braided hoses made up by my local John Deere dealer. Then I insulated them at the spot where they come close to my cat. I used reflective high temp tape from Lowes. Does the job and holds up well. My goal was to lower the trans temp while on the road in the summer time by 20 to 30 degrees. This set up did the trick but I'm sure there are other and maybe better ways. Simplest solution may be to replace your existing radiator mount cooler with a bigger more efficient one.

Also thought I would mention this: the fan is operated by a thermostat that is preset at around 195 F I think. It only comes on when it needs to and mine only runs on the hottest of days when traveling across the Mojave.

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Last edited by Glayd; 12-01-2012 at 10:03 AM.
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Old 12-01-2012, 11:35 AM   #8
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My favorite is Fireguy's mod. He added the cooler and remote filter, but also a thermostat. Why? Well our transmission fluid is designed to make its maximum viscosity at 190*. If you use the stock cooler then the atf is going to be whatever the engine coolant temp is. Use just the cooler and on cooler days or when the trans isn't working as hard you could very well have temps below 190*

His write-up is Here
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Old 12-01-2012, 06:26 PM   #9
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Okay cool. I'll have to keep all this in mind and refer back to it as I'm doing the job. Thank you to everybody.
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Old 12-02-2012, 08:54 PM   #10
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I might as well glue on a target. My opinion is that a secondary cooler is unnecessary if your radiator is good. Most older Broncos are getting to where they need a new radiator and once that is done (and cooling system flushed out) an additional tranny cooler is unneeded.
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Old 12-02-2012, 09:25 PM   #11
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I'll have do disagree Gary, the radiator tranny coolers are marginal and almost any auto in a hard working truck will benefit from an auxiliary cooler.

Sent from my XT603
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Old 12-02-2012, 09:43 PM   #12
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I have a four core heavy duty radiator. I changed that out first thinking that it would take care of the problem with running across the Mojave. Helped a bit but my trans temp was still well over 225. The only thing that really helped the problem was the additional cooler. It only kicks on at 195 F so it's not like it runs all the time. I guess it depends on your driving. Key is to get good readings on the temperatures first.

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Old 12-26-2012, 04:18 AM   #13
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I've done it even though i have an AOD and well it still overheats on hot days sitting in traffic but the cooler did help quite a bit
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Old 12-26-2012, 05:49 PM   #14
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Seattle, you are probably right with your suggestion.
I will probably re-install my original cooler. It's been cold here and it does take a bit for it to warm up. It's better if I back in at night and pull out in "D" when it's cold.

When I installed the remote cooler, I guess I just didn't like the idea of combining the 2 cooling systems. In my early Bronco with a 3000 stall, and similar setup, (cooler in the radiator), it helped the engine run hot.
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