Forum Discussion
Huntindog
Sep 16, 2018Explorer
PaulandAnn wrote:Keith and Lu wrote:PUCampin wrote:
There have been a lot of great posts but I would like to add a little more.
Something I caught in your first post is you bypassed the transmission cooling loop in the radiator when you installed the aux cooler. This is a bad idea. ...
In the case of Nissan trucks, it is a common practice. The radiators up to about 2010 have a possible internal flaw where the seal between the rad fluid and the trans fluid breaks, mixing them, destroying the transmission.
My Pathfinder came with a factory installed external transmission cooler. So I had no qualms doing the same.
Exactly. Thank you. I was going to say that but you beat me to it.
The breakdown tends to occur after about 100K miles of heat/cold cycles.
Also, it's said that the main purpose of the in-radiator xmission cooler is actually to WARM UP the xmission to operating conditions in cold climates. Something I don't worry about in Phoenix. The xmission still has it's separate factory main cooler in front of the radiator. I just added another. Much cheaper and WAY easier than replacing the main radiator itself! :)
I've tested it towing up to 7000ft and it works great.
Anyway, astute observation of my post PUcampin, but like Keith & I explained...
Too cold or too hot are both bad.
BUT...... The radiator tranny cooler does both exceptionally well. Especially during low speed parking. It is amazing how quickly a tranny can heat up. But with a cooler in liquid instead of air..... The heat transfer in both directions is MANY times greater than air.
And the faulty radiator can be replaced pretty reasonable. My first and only search was autozone... 239.00 lifetime warranty.
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