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  #11  
Old 08-06-2012, 09:55 AM
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Well my speed flucsuatted during my travel between 55 to 70 mph depending on the terrain there lots hill's climbs during the trip and the weather was hot between 100 and 108, I was running the A/C at times but would turn it off during hill climbs and yes when I was stopped in traffic the temp did rise on both the transmission and the coolant. Now I am thinking of buying a deeper trans pan and larger aftermarket front trans cooler but my question is when you install the new cooler do you by pass the original trans cooler and run the lines directly to the new cooler and cap off the old OEM trans coolers input area and also maybe add a extra electric fan in front of the new trans cooler with a toggle switch that I can control inside the cab too turn on and off when needed for extra air flow when in slow traffic.

Last edited by Drkangel1; 08-06-2012 at 09:58 AM.
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  #12  
Old 08-06-2012, 10:21 AM
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The cooler I installed is in series with the factory cooler. You want increased capacity, all you can get.
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Old 08-06-2012, 10:33 AM
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thiggins, can you post more info on what you did?
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  #14  
Old 08-06-2012, 10:42 AM
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Quote:
Originally Posted by thiggins View Post
The cooler I installed is in series with the factory cooler. You want increased capacity, all you can get.
exactly what thiggins said. run them in series.
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  #15  
Old 08-06-2012, 11:22 AM
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Quote:
Originally Posted by snrusnak View Post
An aftermarket, over capacity aluminum transmission pan is a good investment. It will transfer heat away from the fluid faster(aluminum transfers heat faster than steel, and it is finned), and you get a few extra quarts which will keep it cooler.

I don't see how a 180 deg coolant tstat would cause reduced transmission temperatures.....but a 180 deg tstat is a good idea in general.

The temps you were running are fine, 225 deg is getting hot for the transmission but like chvyklr said if it's just a peak temp for short period it's fine. If it is sustaining 225 then I'd look to provide better cooling. The stock transmission cooler isn't huge but it is adequate and the stock electric fan will turn on if the transmission temperature gets too hot. Also, if you have the AC on then the electric fan is already running(pulling air through the cooler). This doesn't really matter on the highway but does when sitting idling(trans temps climb greatly when idling).

The gearing changes they suggested would help a lot as well.

How fast were you traveling? Many people try to tow at 70+mph which not only is not safe usually but is really hard on the vehicle. I'm not sure of your speed while towing but there's a huge difference between 65 and 75 or even 65mph and 70mph while towing.
I did a test and posted the difference running a 180 stat compared to a stock stat.
The numbers were crazy different.
Ill try and find it.
A cooler motor means reduced temperatures.
The IAT was over 20 degrees difference.
The oil temp was over 20 degrees difference.
The rest i cant remember,but its craxzy the difference.
A motor running at 220 degrees is going to produce a lot more radiant heat than the same motor at 185 degrees,Im sure you would agree.
The 180 stat is a great mod for towing.

Just do a evic on a hot day,right down all the numbers,and then change to a 180 stat,you dont need to take my word for it.
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  #16  
Old 08-06-2012, 11:27 AM
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Well I agree there will be less heat coming off the engine but I just don't think it'd effect trans temp much if at all.

When stock my truck's normal coolant temp was ~200-210 deg F. Trans was about 140-150 deg F. This is to and from work, no load.

With the 180 tstat and clutch fan removed(adjusted efan settings) and 2800 stall converter, normal coolant temp is ~190-200 deg F and trans ~140-150 deg F.
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  #17  
Old 08-06-2012, 04:44 PM
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Hi Thiggins, ok you say to run it in series with the factory cooler do you have a diagram on this or instructions on how to do this set up I would like to try this but a little visual aid would be great.
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  #18  
Old 08-06-2012, 04:44 PM
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Also just throwing this out there but maybe a trans cooler off a 2500 ram or something like that would fit up and be larger?
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  #19  
Old 08-10-2012, 10:17 AM
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I also did the after-market trans cooler in series, sorry, I don't have a functioning camera, no pics right now,had a shop install it, definately a firm believer in more capacity, had the after-market installed on the upper-right front of all the rads, they ran a hose off of the out-going line from the factory cooler to the in-going of the after-market cooler, then off to the transmission. Excellent results. Tranny runs about 20 degrees cooler, I was starting to dip into the low 200"s prior.
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  #20  
Old 09-03-2012, 12:30 PM
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Keep us updated and please let us know how you make out.......
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