Transmission fluid temps after short hill climb towing

[time4save]

1.5 mile fairly steep climb where I was averaging around 10mpg with a 2500lb trailer. Seems the fluid got pretty hot even on that short a climb. No lights came on as I was almost at the top by the time I took the pic but not sure what I would have done if the road was any longer.

are there aftermarket coolers suggested?

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[bakutheleo]

Not answering your question, but as long as it is not in the "too high" zone I would think it should be fine. The question then would be does it get too high if you did push it longer/harder?

 

[Vincenzo]

I am waiting on a response from Mishimoto. They have a nice cooler for the Tacoma that bolts right in. If it works in the 4 Runner I will be installing it. You can use any cooler that you want, actually. The one from Mishimoto has a nice mount. No “rigging” a mount or figuring a mounting solution

 

[T4RAZ]

I'm surprised this isn't talked about more. My 4Runner transmission runs VERY hot while towing. Trailer is about 2800lbs and my scan gauge shows freeway temps already at 215-220. Going on dirt/rocky road I saw temps up to 240s. That was a couple months ago with ambient temps in the 90s. Im planning a trip in a couple weeks and Im nervous to see the gauge with ambient temps at 105. Im really trying to get a transmission cooler for this ASAP but it seems no one has really done it yet

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