Fan Recommendation for a Transmission Cooler When Travelling at Low Speeds

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Question:

I have a 2011 V6 4x4 Rav4 that tows a Aliner Expedition which is about 2700 lb loaded. I installed a large cooler and it helps a lot keeping my tranny temp under 220 even on uphills. However, on a particular winding road Priest Grade from China Camp to Groveland the tranny reaches 235. I think it is the slow ~ 15-20 mph speed on the grade, coupled with the high outdoor heat often 100 deg F as when I get moving faster again the tranny temp s as air flows over the cooler. Perhaps I need a fan in front of the cooler to keep airflow while driving slow on this long grade? Could you advise something?

asked by: Rav4 T

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Expert Reply:

If you are planning on traveling on steep grades, at a low speed, in high heat...a fan in front of the transmission cooler you have would be a great idea.

I am not sure how big your cooler is but the 8 inch fan part # D16618 should work well and then you could use the thermostatic control part # D16769 so that you can program it to come on at a certain temperature.

expert reply by: Jameson C

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Answer 1

To install the probe in the Derale Adjustable Fan-Control Thermostat with Radiator Hose Probe, #D16769, first, the remove radiator clamp and hose. Next, insert thermostat probe into the upper radiator hose. Then, place the capillary tube on the…

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Answer 2

Depending on the probe being used, there can be more than one way to install it. The probe for #D16769 is supposed to go inside the radiator hose as shown in the diagrams in the instructions I have linked for you. For this probe, if it was not in…

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Answer 3

What's great about a remote cooler with a fan like the Derale Atomic-Cool Remote Transmission Cooler Kit #D13950 that you referenced is that it can basically install wherever it will fit since the fan will provide all of the necessary airflow to…

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Answer 4

Seal 171255UC has an inner diameter of 1.719 inches and outer diameter of 2.565 inches. A seal that has those dimensions would actually be #58846. I've added a link to a video review of this seal for you to take a look at.

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Answer 5

From what I could find it looks like your 122R (red) and 122Y (amber) lights measure 3.75" x 1.70" x .81". We don't have any replacement lense directly for the GLO-BRITE lights but we do have some similar lights that you could use…

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Answer 6

The amount of bow that's put into trailer axles like the #7359765 is based on about how much a trailer is typically going to weigh that has a 3,500 lb capacity. So there's a bit of approximation and obviously it can't be totally perfect…

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Answer 7

While trailer axles do feature an upward bend like you are describing, there isn't a particular amount/measurement that is standard across the board. This bend in the axle is designed so that it will straighten under a trailer's loaded…

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Fan Recommendation for a Transmission Cooler When Travelling at Low Speeds

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