AT warning light intermittently turns on?

Tiny
VINTSHAVE
  • MEMBER
  • 2004 TOYOTA HIGHLANDER
  • 3.3L
  • V6
  • 180,000 MILES
Vehicle listed above is a limited with towing package. There have been times when I have been towing a cargo trailer on a long uphill grade within the approved weight limit, and my AT oil overheat warning light goes on. I have to pull over and wait for it to go out and then do that every couple of miles.

Is there anything else I can do to cool my AT oil so I don't risk damaging the transmission?
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Saturday, September 11th, 2021 AT 11:41 PM

1 Reply

Tiny
ASEMASTER6371
  • EXPERT
Good morning,

I would change the fluid and filter to start to get rid of the overheated fluid.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

A common issue is a clogged cooler. If it is not circulating the fluid correctly, it will heat up the fluid. I would consider replacing the cooler. I listed the part for you below.

Roy

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Sunday, September 12th, 2021 AT 6:05 AM

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