23+ Reliability issues?
Fleet Mechanic
Joined: Jan 2015
Posts: 1,377
Likes: 293
From: SE Michigan
They are not the same. The 10R140 handles higher torque from the diesel and 7.3 gasser, while the 10R100 does not. If they were the "same", Ford would just use one in every truck. They don't.
I have two sisters. They are twins, but are fraternal twins, not identical twins. They are not the same - they are different, even though they share some things.
I have two sisters. They are twins, but are fraternal twins, not identical twins. They are not the same - they are different, even though they share some things.
Last edited by roadpilot; Jan 1, 2026 at 11:16 AM.
Lead Driver
Joined: Jan 2002
Posts: 8,628
Likes: 4,711
From: Itinerant
Since this is a Ford enthusiast site, I will just stick to Ford 10R100/140 transmissions.
https://nextgendiesel.com/blogs/tran...lems-solutions
https://nextgendiesel.com/collection...smission-parts
You can get this information off various sites/sources.
For the general person towing lighter weight (under 12k) and doing proper maintenance intervals, these transmissions should take you outside the warranty period.
I will probably do the valve body kit, deep pan, and be happy by 10k miles. I'm at 2k miles now.
https://nextgendiesel.com/blogs/tran...lems-solutions
https://nextgendiesel.com/collection...smission-parts
You can get this information off various sites/sources.
For the general person towing lighter weight (under 12k) and doing proper maintenance intervals, these transmissions should take you outside the warranty period.
I will probably do the valve body kit, deep pan, and be happy by 10k miles. I'm at 2k miles now.
Service every 25k miles oil in transmissions?
Get off the egg nog.
Last edited by scraprat; Jan 1, 2026 at 11:48 AM.
Thread Starter
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Cross-Country
Joined: Jul 2003
Posts: 97
Likes: 34
My 24 f350 7.3 has been perfect for 60k miles so far. Hauling 4500lb truck camper across country 2 times. Hauling snowmobiles for hundreds of miles. Plowing my friends and family out. All I've done is change the oil and filter and air filter.
I owned 5 ford diesels 3 of them 6.7's. Never go back now I have seen and used the Godzilla.
I owned 5 ford diesels 3 of them 6.7's. Never go back now I have seen and used the Godzilla.
I had always hoped that the stories of the "diesels will last 3-400K miles" were true. But those data points seem to only live with tow truck drivers.
Thread Starter
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Cross-Country
Joined: Jul 2003
Posts: 97
Likes: 34
I owned two Tundras, a 2018 and a 2022. Was planning to get a 2026.
Engine was replaced on the '22 under recall even though the TT-V6 was still OK, if a little noisy, at 30,000 kms. A friend who had a 2022 Tundra was so frustrated with it, he traded it for a brand new 2024, thinking many of the early problems with the new 3rd gen would have been ironed out, most notably the engine failures. They were not. The same problems, even the same window rattles were present, and he traded that truck too. 2024s are now subject to the engine recall.
I have been a Toyota customer, and big fan of the brand, for a long, long time. I still own a 1983 Land Cruiser FJ60. But with no changes to the 2026 Tundra (the fifth model year of the third gen), with no changes to the problematic engine, no interior changes and no evidence of the many quality problems being addressed — and with a big increase in price from my 2022 LTD with TRD — it was time to try something else, at least for a few years until the Tundra gets its **** together.
Having recently factory ordered (what a concept: ordering what you want on a truck instead of being told what you're getting) and taken delivery of a 2026 F-250 Lariat crewcab with the 7.3L, I can honestly say the 250 is a vastly superior truck in terms of build quality, fit and finish, noise, vibration, harshness — and with almost three times the payload and towing capability of the Tundra — for only about $10k more. Even the ride quality, from a 3/4 ton no less, is infinitely better — the smoothness is unreal, hard to comprehend really.
Stepping on the throttle is now an exercise in pleasure instead of laggy and delayed frustration from the TT-V6, even with the replacement engine. Highway driving is quiet instead of wondering if a window is open. The exhaust note of the 7.3 is perfect, not weird. The window frames don't squeak. Getting in and out of the bed does not require a weird step. My armrest feels like a vault. The seats could not be more comfortable. The heated steering wheel gets hot. The seats + wheel warm up when I remote start, and the engine does not shut off when I open the door. I do not have to get a subscription to lock or start my truck by phone a year from now. The bed doesn't sag when I add 15 bags of Sakrete. I'm still smitten with this thing.
Sure, I miss the full, power rear window of the Tundra some days, as well as the tailgate release on the side of the brake light, but I'm having a hard time thinking of much else I miss. Maybe the fuel consumption in town. Tundra was 18-19 L/100 km, versus the 25-28 L/100 I get now, but cost of fuel is not high on my priorities. Remarkably, the 7.3L can get 13 L /100 km on the highway at 100 km/h. I know it's not a fair comparison, going from a 1/2 to 3/4 ton. I had lived with Tundra's lesser capability only because of its reliability, but when the reliability part disappeared, I was done.
No doubt the F-250 will have issues or recalls at some point, but for now it feels like the right decision on a way better truck.
Engine was replaced on the '22 under recall even though the TT-V6 was still OK, if a little noisy, at 30,000 kms. A friend who had a 2022 Tundra was so frustrated with it, he traded it for a brand new 2024, thinking many of the early problems with the new 3rd gen would have been ironed out, most notably the engine failures. They were not. The same problems, even the same window rattles were present, and he traded that truck too. 2024s are now subject to the engine recall.
I have been a Toyota customer, and big fan of the brand, for a long, long time. I still own a 1983 Land Cruiser FJ60. But with no changes to the 2026 Tundra (the fifth model year of the third gen), with no changes to the problematic engine, no interior changes and no evidence of the many quality problems being addressed — and with a big increase in price from my 2022 LTD with TRD — it was time to try something else, at least for a few years until the Tundra gets its **** together.
Having recently factory ordered (what a concept: ordering what you want on a truck instead of being told what you're getting) and taken delivery of a 2026 F-250 Lariat crewcab with the 7.3L, I can honestly say the 250 is a vastly superior truck in terms of build quality, fit and finish, noise, vibration, harshness — and with almost three times the payload and towing capability of the Tundra — for only about $10k more. Even the ride quality, from a 3/4 ton no less, is infinitely better — the smoothness is unreal, hard to comprehend really.
Stepping on the throttle is now an exercise in pleasure instead of laggy and delayed frustration from the TT-V6, even with the replacement engine. Highway driving is quiet instead of wondering if a window is open. The exhaust note of the 7.3 is perfect, not weird. The window frames don't squeak. Getting in and out of the bed does not require a weird step. My armrest feels like a vault. The seats could not be more comfortable. The heated steering wheel gets hot. The seats + wheel warm up when I remote start, and the engine does not shut off when I open the door. I do not have to get a subscription to lock or start my truck by phone a year from now. The bed doesn't sag when I add 15 bags of Sakrete. I'm still smitten with this thing.
Sure, I miss the full, power rear window of the Tundra some days, as well as the tailgate release on the side of the brake light, but I'm having a hard time thinking of much else I miss. Maybe the fuel consumption in town. Tundra was 18-19 L/100 km, versus the 25-28 L/100 I get now, but cost of fuel is not high on my priorities. Remarkably, the 7.3L can get 13 L /100 km on the highway at 100 km/h. I know it's not a fair comparison, going from a 1/2 to 3/4 ton. I had lived with Tundra's lesser capability only because of its reliability, but when the reliability part disappeared, I was done.
No doubt the F-250 will have issues or recalls at some point, but for now it feels like the right decision on a way better truck.
If I had confidence that a 6.7 PS with a disaster prevention kit would give me 200K with just routine/preventative maintenance, I'd consider it. But the fact that there are these ongoing conversations about the 10R140's reliability, I'm back at square one.
More Turbo
Joined: Aug 2025
Posts: 664
Likes: 371
They are not the same. The 10R140 handles higher torque from the diesel and 7.3 gasser, while the 10R100 does not. If they were the "same", Ford would just use one in every truck. They don't.
I have two sisters. They are twins, but are fraternal twins, not identical twins. They are not the same - they are different, even though they share some things.
I have two sisters. They are twins, but are fraternal twins, not identical twins. They are not the same - they are different, even though they share some things.
And where do you get an option? You don't.
A t56 would be a nice different trans to get back. With a nice console that fit around it well.
Last edited by Midwest87; Jan 1, 2026 at 12:38 PM.
Banned
Joined: Jul 2025
Posts: 74
Likes: 45
Since this is a Ford enthusiast site, I will just stick to Ford 10R100/140 transmissions.
https://nextgendiesel.com/blogs/tran...lems-solutions
https://nextgendiesel.com/collection...smission-parts
You can get this information off various sites/sources.
For the general person towing lighter weight (under 12k) and doing proper maintenance intervals, these transmissions should take you outside the warranty period.
I will probably do the valve body kit, deep pan, and be happy by 10k miles. I'm at 2k miles now.
https://nextgendiesel.com/blogs/tran...lems-solutions
https://nextgendiesel.com/collection...smission-parts
You can get this information off various sites/sources.
For the general person towing lighter weight (under 12k) and doing proper maintenance intervals, these transmissions should take you outside the warranty period.
I will probably do the valve body kit, deep pan, and be happy by 10k miles. I'm at 2k miles now.
You should probably click and read the links before just typing out dribble....I'm not the one that sounds drunk at 10am.
Fleet Mechanic
Joined: Mar 2017
Posts: 1,304
Likes: 177
From: Vancouver, BC
IMO any vehicle now will have longevity issues due to all the electronics and emissions. They didn't have power seat or heated seat issues in 1972....lol
How many miles a year are you planning on doing? I looked at it this way, my 2025 Platinum Tremor with the 6.7 is getting just shy of 16mpg as a mix of city and highway over the first 3000 miles. This is as my daily driver, not sure what the 7.3 Tremor is getting (it has the heavier transmission I believe). I haven't had a long haul heavy tow yet as it's winter now but I figure I should get 3-4mpg better towing heavy than the 7.3. Over an 8000 mile trip that's a decent savings plus an easier tow. If I trade the truck in 5-7 years the powertrain will still be in or just out of warranty and will have hopefully a higher trade-in value. Warranty is a good thing, that's why I traded in my 2017 6.7. The truck was fantastic for 8 years of use and hauling heavy but the risk of a significant repair pushed me to trading it in.
If the big issue for you is the transmission, just get the truck with the heavier transmission.
How many miles a year are you planning on doing? I looked at it this way, my 2025 Platinum Tremor with the 6.7 is getting just shy of 16mpg as a mix of city and highway over the first 3000 miles. This is as my daily driver, not sure what the 7.3 Tremor is getting (it has the heavier transmission I believe). I haven't had a long haul heavy tow yet as it's winter now but I figure I should get 3-4mpg better towing heavy than the 7.3. Over an 8000 mile trip that's a decent savings plus an easier tow. If I trade the truck in 5-7 years the powertrain will still be in or just out of warranty and will have hopefully a higher trade-in value. Warranty is a good thing, that's why I traded in my 2017 6.7. The truck was fantastic for 8 years of use and hauling heavy but the risk of a significant repair pushed me to trading it in.
If the big issue for you is the transmission, just get the truck with the heavier transmission.
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Lead Driver
Joined: Jan 2002
Posts: 8,628
Likes: 4,711
From: Itinerant
I put in bold what I think and what other experts have said. With just proper maintenance intervals and a stock truck 100-150k mile transmissions. If you do a valve body kit, larger pan, and 25k intervals I'm willing to bet a lot longer.
You should probably click and read the links before just typing out dribble....I'm not the one that sounds drunk at 10am.
You should probably click and read the links before just typing out dribble....I'm not the one that sounds drunk at 10am.
I guess it's a good time to own a transmission shop with all the 25k lemons rolling down the road.
Always enjoy the fresh knowledge coming to the board to teach us drooling window lickers how to get our trucks beyond the 25k mile mark.
Banned
Joined: Jul 2025
Posts: 74
Likes: 45
I'm not a GM transplant spouting his Ford knowledge from "experts" or internet sites selling "upgrades".
I guess it's a good time to own a transmission shop with all the 25k lemons rolling down the road.
Always enjoy the fresh knowledge coming to the board to teach us drooling window lickers how to get our trucks beyond the 25k mile mark.
I guess it's a good time to own a transmission shop with all the 25k lemons rolling down the road.
Always enjoy the fresh knowledge coming to the board to teach us drooling window lickers how to get our trucks beyond the 25k mile mark.
Time will tell. Oil is cheap...
Lead Driver
Joined: Jan 2002
Posts: 8,628
Likes: 4,711
From: Itinerant
Thats not what I said and I can see now that reading comprehension is difficult for you. I choose to do 25k mile service intervals. Do whatever you want with your truck. If you honestly believe that doing service on these transmissions over 100k miles is acceptable I have some beach front property in Colorado for ya.
Time will tell. Oil is cheap...
Time will tell. Oil is cheap...
..."10R140 is pretty good after 2023 (internal strengthening) and you have some options. 1) do nothing but service every 25K miles. 2) Valve body upgrade and service every 25K miles, swap out plastic trans pan 3) buy a fully built 10R140 when yours ****s the bed. I have chosen to do option 2."
If only I owned a truck with over 100 k miles on the first transmission. LOL
Last edited by scraprat; Jan 1, 2026 at 02:23 PM.
Logistics Pro
Joined: May 2021
Posts: 3,986
Likes: 2,324
Ford still offers XL and STX trim SD gas trucks with no emissions, manual seats, no sensors in bumpers, no cylinder deactivation, no start-stop, and in 2026 no electronic driving nannies. From a practical perspective my 26 is as simple as my 22 with the exception of the electronic parking brake. Current(not sure about 2027s) SDs are probably the last of the 20 year vehicle out there.
Last edited by twobelugas; Jan 1, 2026 at 02:03 PM.
Fleet Mechanic
Joined: Jan 2015
Posts: 1,377
Likes: 293
From: SE Michigan
Again, if the 10R100 and 10R140 were identical (aka the same), there would only be one. There isn't.
And where do you get an option? You don't.
Laughing Gas
Joined: Jun 2023
Posts: 1,134
Likes: 627
From: McKinney, TX
I have one of each... they are 2 very different transmissions in the way they behave. About the only commonality is they both have 10 speeds.