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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #1  
Old 05-22-2014, 05:06 PM
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Default Trans cooler fan?

I put a small 7" ( I believe) aux fan on my 12 row trans cooler (Stock) and it doesn't seem to be cooling anymore then the normal ram air threw the grill. I have my trans temp sensor in the side of the pan below the filter inlet. Fan just doesn't seem to cool the fluid though! Any advice would be awesome!
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Old 06-22-2014, 09:33 PM
DodgieDan DodgieDan is offline
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First Question is what does the Trans temp guage read and next what are you trying to accomplish by having a temp guage in the first place. All Auto transmissions have a specific temp they run best at. Trans fluid that is too cool can cause sluggish shifting.
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Old 06-22-2014, 10:01 PM
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Ram ran a hot exhaust crossover pipe DIRECTLY beneath the transmission! Guess what that does?

I installed a heat shield onto the crossover pipe and saved my transmission from that scorcher.
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Old 06-22-2014, 10:58 PM
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Default

It normally runs 140 -120 going to work an back give or take temps outside but in the big city it can get up to 190 but the fan seems to not bring it down either at that temp and I have the gauge to monitor! To man blown up second gen trans in the past due to heat
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Old 06-24-2014, 12:19 AM
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Default

120-140 is pretty damn cool for a transmission. 190 is about "perfect" for efficiency. I'd take the fan off and let it be. Until you start getting in to the 225-250+ deg F that's when major fluid break down starts happening.

The cooler it is the longer it lasts. But mpg goes way down the cooler it is as well. They usually say something around 180 or 190 I believe is "ideal" for wear and efficiency. Some newer vehicles(including some rams) have transmission fluid HEATERS to get the fluid up to temp asap to improve mpg.
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Old 06-24-2014, 10:59 AM
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Default

Ya I normally don't do long trips it's just 10 miles round trip to work so the trans temp only gets up to 120 or so. I have the toe package so maybe that's why the trans runs cooler but it's a small 12 row cooler so it's not that big at all! I'm getting these readings from the pan, I have the sensor right below were the filter intake is. Plus I have the 4wd pan and filter holds a couple more quarts. I figured my readings are accurate in the pan because don't the stock sensor take temp reading from the sump?!
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Old 06-24-2014, 04:57 PM
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Yes I believe stock temp sensor is in the sump.

All the v8 rams (late models) have the same trans cooler, I was told. Whether you have "hd cooling" "tow package" etc, they all have the same cooler.
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Old 06-24-2014, 05:12 PM
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What condition is the fluid and filter in?
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