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Old 01-16-2018, 08:25 AM   #1
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Transmission temperature

Several months ago I read on this forum about transmission temperatures. Now I canít find it to reread it. Iím trying to find out what transmission temperature is to hot. I have one steep grade mountain north west of Chattanooga I have to top every year to and from Florida. I watch my tranny temp climb. No alarm goes off but I alway stop at the top for an hour before descending. How hot is to hot?
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Old 01-16-2018, 08:31 AM   #2
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Depends on the transmission. I've got an Allison and anything below 230 degrees is fine.
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Old 01-16-2018, 08:45 AM   #3
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My Ram usually runs cooler than that but has gotten a bit hotter towing in hills in the hot summer. My gauge, and Ram mechanic, says that is within spec. My previous Ram was designed to run cooler. Posting your truck and tranny may help you get better answers.
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Old 01-16-2018, 08:45 AM   #4
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I have a 2009 Chevy 2500 Hd 6.0 with a 6 sp. has a tranny cooler
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Old 01-16-2018, 08:48 AM   #5
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Transmission temps are discussed daily on truck forums.
My 2017 F-250 sees temps around 225-230ļ regularly, towing or not.
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Old 01-16-2018, 08:56 AM   #6
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Sorry should also add I’m pulling a 8500 lb 5er. I tried to search the forum for the past thread that was very helpful but can’t find it.
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Old 01-16-2018, 08:56 AM   #7
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Spousal unit had a transmission business a few years ago, he likes 160-180f. says 200+ decreases fluid life exponentially and he promotes draining fluid annually and then topping off, he's not a fan of flushing (sic) Hope ya'll don't mind a blond spouting off with second hand info...
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Old 01-16-2018, 09:25 AM   #8
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Here's one.
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Old 01-16-2018, 09:28 AM   #9
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Old 01-16-2018, 10:01 AM   #10
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Quote:
Originally Posted by popeye305 View Post
I have a 2009 Chevy 2500 Hd 6.0 with a 6 sp. has a tranny cooler
I tow heavy and I always have. I have been as high as the Eisenhower Tunnel out west and have towed on I40 over Black Mountain in NC in the east. My transmission temps never go over 200F. I have a transmission temp gauge and watch this when towing to ensure that I do not go over 200F when towing. One of the items I have installed on my truck was a Mag-Hytec deep dish oil pan with the temp probe in the transmission oil pan. This is a AL fin pan that will hold anywhere from 2 to 4 QTs of oil depending on the transmission make. The Al will help to dissipate heat from the oil along with your oil cooler. The extra oil will insure better fluid retention of debris suspended in the oil until they can be filtered out.

I would look into installing this on your truck with a actual probe in the pan oil with a transmission temp gauge to read the oil temps in the pan. Just my humble opinion!
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