Trans Cooler Help

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roccodart440

roccodart440

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I have a 727 with a very tight and efficient 3500 convertor behind it. I recently bought a new radiator. It doesn't have a tranny cooler like the old one.

The new radiator is a Be Cool package 80198. Be cool recommended their 96301 tranny cooler with puller fan.

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So here are my questions....

What tranny cooler are you running?

Where and how is it mounted?

Any info on the heat sink style like the picture below?
 

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I have also been wondering about this. How big is the one in the picture? What size cooler is equivalent to a stock radiators oil cooler?
 
I used this one on my '69 Barracuda. I have a 2004R with a non lock up torque converter. Non lock ups produce more heat than lock up converters. But I do run the trans fluid through the radiator first. My trans temp never goes above 185. You can't see it at all going down the street, I took these picks while I had the car on the rack.

Treblig
 

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It's really hard to go too large on a trans cooler as far as the trans is concerned. I'd use a heat sink type cooler on a drag racer, or for power steering in a light rock crawler. For a street car, especially one with a 3500 stall converter, I'd go with a Setrab or a Mocal. The largest that you can fit, the better.

http://www.bakerprecision.com/setrab.htm

http://www.batinc.net/coolers.htm
Cooler.GIF
 
So the radiator and fan type is better for the street?
 
Depends on where you mount it. If in front of the radiator isn't an option, then having one with a fan is a good idea for the tougher cooling jobs.

As was mentioned, a trans fluid temp gauge in the pan is a very good idea. My own limit is 220°F Past that and I stop doing what ever it is that I'm doing and let it cool down. I've been told that the OD versions of the 727 trans don't circulate fluid when in Park, but do circulate it when in Neutral. I would assume that this is also true of non OD 727's.

Metal tubing is better than hose for this use because it too acts as a cooler. The longer it can be, the more cooling just the plumbing can do for you. I would still convert to hose to make the jump off the chassis to the engine/trans. I know that none of the OE's do it and I've long thought that a poor decision made by economics.
 
Here's another mounting idea (stolen from crackedback-Rob). Super easy to do and utilizes existing holes. Just two small brackets made from 1/8" aluminum sheet metal.

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1216141623_zps8a85925b.jpg
 
I just don't see the heat-sink type out cooling a good stacked plate or stacked plate with fins type cooler. I would venture that there is an order of magnitude difference in wetted surface area in favor of the plates. Can not say that I've ever seen one on any endurance race car. Only ever seen them on street rods & hot rods.

Anyone ever seen a study done on this?
 
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