10-Speed Operating Temps
I am curious what everyone's 10 speed operating temps are.
I am coming from a 5th Gen Ram 1500 with a ZF 8 speed. With that truck, I typically saw 180-190 operating temps once things warmed up. Occasionally, I would see 195-200 if I was hitting a lot of hills and/or towing.
From what I am seeing, these Ford 10 speeds run downright hot. The other day with ambient temps in the 50's, I had 195 when I got home. The other day I looked and happened to see 202 if I recall correctly. This is way hotter than what I am used to. It's a brand new truck as well. Only 600 miles on it and I drive very normal/kind of slow.
I am coming from a 5th Gen Ram 1500 with a ZF 8 speed. With that truck, I typically saw 180-190 operating temps once things warmed up. Occasionally, I would see 195-200 if I was hitting a lot of hills and/or towing.
From what I am seeing, these Ford 10 speeds run downright hot. The other day with ambient temps in the 50's, I had 195 when I got home. The other day I looked and happened to see 202 if I recall correctly. This is way hotter than what I am used to. It's a brand new truck as well. Only 600 miles on it and I drive very normal/kind of slow.
Senior Member




Joined: Jan 2020
Posts: 3,236
Likes: 1,677
From: Somewhere on the south side of Heaven.
They do run real hot compared to older transmissions. But they are designed like that and the Mercon ULV is engineered to withstand it.
In extreme towing conditions you could even see it get up to 250F and the truck still not go into limp mode. That hot would be (in my opinion) rare for most people but it does happen. Hottest I ever saw was 230F and it was only brief.
Don't panic if you see it get up to 230F if you tow a heavy travel trailer on a 100F day.
If you tow frequently and tend to see 230F temps I would probably follow a severe duty maintenance cycle for transmission fluid and filter changes.
In extreme towing conditions you could even see it get up to 250F and the truck still not go into limp mode. That hot would be (in my opinion) rare for most people but it does happen. Hottest I ever saw was 230F and it was only brief.
Don't panic if you see it get up to 230F if you tow a heavy travel trailer on a 100F day.
If you tow frequently and tend to see 230F temps I would probably follow a severe duty maintenance cycle for transmission fluid and filter changes.
They do run real hot compared to older transmissions. But they are designed like that and the Mercon ULV is engineered to withstand it.
In extreme towing conditions you could even see it get up to 250F and the truck still not go into limp mode. That hot would be (in my opinion) rare for most people but it does happen. Hottest I ever saw was 230F and it was only brief.
Don't panic if you see it get up to 230F if you tow a heavy travel trailer on a 100F day.
If you tow frequently and tend to see 230F temps I would probably follow a severe duty maintenance cycle for transmission fluid and filter changes.
In extreme towing conditions you could even see it get up to 250F and the truck still not go into limp mode. That hot would be (in my opinion) rare for most people but it does happen. Hottest I ever saw was 230F and it was only brief.
Don't panic if you see it get up to 230F if you tow a heavy travel trailer on a 100F day.
If you tow frequently and tend to see 230F temps I would probably follow a severe duty maintenance cycle for transmission fluid and filter changes.
5 Year Member




Joined: Mar 2009
Posts: 1,328
Likes: 535
From: The Great Midwest, aka, Flyover Country
My "older" 2018 with the 3.5TT and Max Tow pkg normally runs 204-208 in the summer, cooler in the winter obviously. Saw it get as high as 224-228 towing a 20' 5000# TH in August. Changed the fluid at 42K miles and it looked fine with no burnt odor or darkening. I frequently run the transmission in the T/H mode (even when not towing) to force the valve body to shift at higher RPMs--presume it generates higher line pressure which maybe keeps the CDF in a better position with less slip and wear. Just a guess. Still shifts fine with none of the glitchy gear changes, flaring, or harsh downshifts that many here complain about....knock on wood.
Last edited by icantdrive55; Mar 31, 2026 at 12:27 PM.
I am curious what everyone's 10 speed operating temps are.
I am coming from a 5th Gen Ram 1500 with a ZF 8 speed. With that truck, I typically saw 180-190 operating temps once things warmed up. Occasionally, I would see 195-200 if I was hitting a lot of hills and/or towing.
From what I am seeing, these Ford 10 speeds run downright hot. The other day with ambient temps in the 50's, I had 195 when I got home. The other day I looked and happened to see 202 if I recall correctly. This is way hotter than what I am used to. It's a brand new truck as well. Only 600 miles on it and I drive very normal/kind of slow.
I am coming from a 5th Gen Ram 1500 with a ZF 8 speed. With that truck, I typically saw 180-190 operating temps once things warmed up. Occasionally, I would see 195-200 if I was hitting a lot of hills and/or towing.
From what I am seeing, these Ford 10 speeds run downright hot. The other day with ambient temps in the 50's, I had 195 when I got home. The other day I looked and happened to see 202 if I recall correctly. This is way hotter than what I am used to. It's a brand new truck as well. Only 600 miles on it and I drive very normal/kind of slow.
Before any chimes in and says it is too cold?
I was stationed in Alaska with my 2005 f150 even with stock t-stat maybe 120?
Hey Y’all
I’ve had a email conversation with Richie at 5* and he said if you have upgraded turbos and pushing 20+ pounds of boost, with HP tuner. You are a good candidate for 3bar map sensor.
please chime in with your thoughts!!!
I’ve had a email conversation with Richie at 5* and he said if you have upgraded turbos and pushing 20+ pounds of boost, with HP tuner. You are a good candidate for 3bar map sensor.
please chime in with your thoughts!!!

