6r140 trans temp
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Freshman User
Joined: Mar 2019
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6r140 trans temp
Hey guys I have a 2018 f-250 and my trans peaks around 230 when I’m towing a 14k trailer up huge grades and the drops, my question is will this wreck or shorten the life on my truck and when should I change the tranny fluid? Are other people running similiar to me?
thanks in advance
thanks in advance
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Freshman User
Joined: Mar 2019
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when towing in the 210? Or normal operation
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Laughing Gas
Joined: Sep 2018
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Highest I've ever seen was 207. This was on my 19 F350 6.2 pulling 10k on a 7mile 5% grade at 95*
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Fleet Mechanic
Joined: Nov 2019
Posts: 1,250
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From: Livingston Tx
That was towing probably 15,000 with my 6.2 just the truck alone they normally run in the upper 190’s to max 203 but on average just the truck 197
Logistics Pro
Joined: Dec 2003
Posts: 3,776
Likes: 862
From: Foothills of NC
The key to keeping trans temps down is to manually shift the transmission to a low enough gear where the rpms are high enough to pull good, and most importantly, keep the torque converter locked. An unlocked torque converter will raise trans temps a lot in a short amount of time.
Fleet Mechanic
Joined: Nov 2019
Posts: 1,250
Likes: 192
From: Livingston Tx
The key to keeping trans temps down is to manually shift the transmission to a low enough gear where the rpms are high enough to pull good, and most importantly, keep the torque converter locked. An unlocked torque converter will raise trans temps a lot in a short amount of time.
Tuned
Joined: Dec 2020
Posts: 390
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From: Sacramento
This is key right here and the main reason I tuned my 6.2 my converter is fully locked from 2nd gear through 6th in towhaul and 3rd through 6th in normal mode. Ford has them lock up I believe 5 Star told me in only 4-6 and only 60% of the time they never fully stay locked up. 5 Star made my 6.2 like driving a totally different truck. After driving it tuned for over a year now I loaded the stock tune back up just to see the difference and man did it suck I got back from town and put my daily tow tune back on it.
Hotshot
Joined: Oct 2015
Posts: 19,687
Likes: 12,812
From: Wyoming
I see transmission temperatures in the low 230's in my F-350 when towing up mountain passes and towing my 11K GVWR travel trailer.
I tried forcing the transmission down a gear or two, but I didn't see enough of a change in the transmission temperature to justify manually shifting the engine. On my prior 1/2 ton truck that was a very common and very effective thing to do. I thought I would see a similar effect on my F-350, but it didn't happen. Maybe it was just that instance. I'll try it again eventually.
I tried forcing the transmission down a gear or two, but I didn't see enough of a change in the transmission temperature to justify manually shifting the engine. On my prior 1/2 ton truck that was a very common and very effective thing to do. I thought I would see a similar effect on my F-350, but it didn't happen. Maybe it was just that instance. I'll try it again eventually.