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Old 08-30-2020, 06:22 AM   #1
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1994 Ford F53 Transmission Temperature

I have a 1994 Itasca Suncruiser with a Ford F53 chassis. I installed a transmission temperature gauge and a cooler fan on the transmission cooler. I have read a lot about the safe temperature being 180 degrees, but when driving on mountains in external temperatures of 85 or more with a tow vehicle, my temperature bumps up to 210 degrees. It doesn't get higher. The trans temperature will drop when the external temperature drops or if it rains. If the external temperature is very hot, on level roads, the tran temperature is around 195.

Are these temperatures considered normal under these driving conditions?

Thanks!

Sean
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Old 08-30-2020, 07:43 AM   #2
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210 is fine and safe. higher temps like 260 and up are what kills transmissions.
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Old 08-30-2020, 01:36 PM   #3
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Contrary to what the people who sell transmission coolers like to say in their charts, you actually want your transmission to run rather above 180F. Like engines, transmissions are prone to internal condensation from heat cycling. To really boil that moisture off the fluid needs to reach about 190F. I'd be tickled to death with a consistent 210F.
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Old 08-30-2020, 05:43 PM   #4
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Quote:
Originally Posted by GypsyR View Post
Contrary to what the people who sell transmission coolers like to say in their charts, you actually want your transmission to run rather above 180F. Like engines, transmissions are prone to internal condensation from heat cycling. To really boil that moisture off the fluid needs to reach about 190F. I'd be tickled to death with a consistent 210F.
Exactly right!

You can run as hot as 220F all day long with no problems. You can go as high as 250F for up to a half hour at a time.
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Old 08-30-2020, 05:51 PM   #5
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Synthetic fluid would also help temps....
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Old 08-31-2020, 04:21 AM   #6
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Thanks!

I'm glad to hear that! Thanks for the responses!
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