I actually don’t think many parts are interchangeable and there’s quite a few differences that have impacted the difference in reliability between the gm and ford trucks with gm having a rougher go at it.

 

Both brands developed their HD 10 speeds in-house. There have been plenty of tear down videos on YouTube showing how very different they are.

 

I agree.

I've only lost one 10-speed transmission in the fleet, it was 2019 F150 for drum failure.

None of my 2020 10 speeds up 250's or or larger either.

Admittedly, I didn't like the 10-speed in the 2020s, one in particular. Other than that they all been pretty flawless.

 

So if you look in your crystal ball, my daily driver is a 24 f550, towes something most day of week. It might be a 8000 pound generator to a 45ft gooseneck with a total weight of 50,000 lb go across country.

I'm at 55,000 mi now, No maintenance other than tire rotations, fuel filters every 15 and oil at every 7,500. Nothing on the transmission.

What is my life expectancy on the transmission.

 

The basic architecture of the HD 10 speeds is the same. There certainly are differences but many similarities.

The 6R140 was / is a great transmission. It holds up well even when worked hard.

We lost a 10R140 in a 2020 F550 diesel. Otherwise, none have outright failed but they are clunky. The newest ones do seem better. My own 2025 F-250 is mostly smooth.

 

you can call it architecture or whatever you like but the parts are different and in very meaningful ways.

our 10speeds have been solid in our fleet. Not something we’ve had to deal with.

 

I know this is long but hope this will give you better perspective on what you want. Understanding the requirements whether towing or reliability played a lot into the truck I decided on. Like you I spent countless hours reading countless number of forums. Be cautious about forums. Most people tend to not go into forums unless they are upset about the brand due to experiences they have had. I have tried to be as honest as possible providing the good and the bad. Good Luck.
I owned a 1996 ram 2500 with the Cummings. Great truck accept the ATX failure at 89k. Replaced with $6k Jasper. This transmission was shifting hard from the start. Went back to Jasper distributor and was told it was normal due to the updates. 1800 miles failed again and Jasper left me high and dry. Never again. Jasper is also Cr-p. Had a friend with Jeep Wrangler. Same story with Jasper. She had a Jasper engine put in and a couple months later the engine completely seized. It was weeks before a replacement engine was put in the Wrangler due to Jasper's games. 1996 superior diesel with no emission cr-p. Shame RAM had lousy ATX. Dumped it for 2018 ram 2500 with 6.4 liter and 6 speed for we were 8 hours from home. Night and day compared to 1996. Disappointed. 1996 diesel torque superior with my 6k camper. You would think after 20 years a 2500 with 6.4L, 6 speed ATX combo would be equally good as 1996 2500 with 3 speed overdrive ATX. Not even close. 21k miles ATX started to give me issues on the 2018 ram 2500. Traded in for a 2024 f250 with the 7.3 Gasser and 10R140. Towing same trailer wow this engine is fantastic with the transmission. The other two trucks towing same route both would shift every time going up a hill. Had to feather control the gas pedal up and down hills to avoid the constant shifting in cruise. The F250 with the 7.3l left in 9th, wow what a dream. Will not shift until fairly steep grade towing the same 6k camper. Could not use cruise with other 2 Dodges. The F250 no issues using the cruise towing the 6 k trailer. All vehicles used tow haul mode if it had one. The 1996 did not. Had to shift it out of overdrive.
Bottom line the 1996 was a really good diesel with reliable mechanical high pressure fuel pump. Shame ATX was garbage. The 6.4L Hemi is a good engine but again the ATX on this truck was cr-p. So far the F250 with 7.3L and 10 speed is my new love. I was partial to Dodge but never again. Had dodge done the right thing and used a good ATX like the Cummings engine I would still be driving Ram. Supposedly they have moved on to German 8 speed but the damage is done for me. I would say for anything less then 10k lbs I would go with the 7.3L F250 Gasser. Mine has a little over 19k towing maximum. Earlier on 2021 and 2022 both engine and ATX issues which have been addressed. The engine was lifters going bad on box trucks that would sit and idle all day. Supposedly Ford increased the speed of the oil pump via computer program. I don't let mine sit there and idle. If I did I would push gas peddle every couple minutes. The ATX issues were addressed. 2023 and 2024 seem to have those issues fixed.
As for cost to operate. I get about 12 MPG towing 6k trailer. I am very good with that. Today's diesels require periodic expensive maintenance and does not make sense to use diesel with the price of diesel and requirements to run DEF. The emission systems have killed gas mpg on diesels and added unreliability. The couple of miles per gallons more you get on the diesel is not worth it unless your going to be pulling a house. I am not trying to offend any diesel owners out there but for my situation the F250 with 7.3L Gasser is simply outstanding to drive when towing less than 10K lbs. It will tow 19K but towing at less than 50% of capacity makes for a smooth and comfortable drive using cruise and fueling with Gas. The 7.3L natural aspirated (Non Turbo) engine is simplistic and should provide better reliability and reduced maintenance cost as compared to a diesel.

 

@thibodet , you missed the boat on your gas HD RAM by one year. The 2019 and newer RAM HD came with the ZF 8 speed and same Hemi 6.4L…that transmission absolutely transforms how those trucks drive. So smooth and responsive. Still works harder than a 7.3L Zilla from Ford but the transmission shifts absolutely flawlessly, with perfect logic logic and shift execution, every single time. I love my Ford and for the most part the 10-speed shifts well, but every now and then it still clunks at low speed or picks the wrong gear for a second and needs to abruptly shift again. The RAM never did that, ever.

 

Shoot... GM can't build a reliable 6-speed truck transmission... been there, got the invoice.

 

From 1998 to 2024 for over a quarter of century I drove two Dodges. Diesel and Gasser both ended up with ATX failure and other major issues. The newer Dodge in addition to ATX issues at 10k miles started to exhibit breaking issues. ABS failure resulting from ABS module and or Hydraulic Control Unit. It took over a year to get Dodge to fix it only after I paid diagnostics an spent countless letters and many hours via email communicating directly with RAM. Initially they told me it was going to cost me to fix. The truck would not stay in cruise due the ABS issue constant faulting. A recall was finally established for this. I have two friends with 20217 and 2018 Rams.They had the same brake issue. These vehicles are very expensive and for the amount of money I spent on a new 2018 I would expect much better. For me that was the nail that sealed the coffin. 90% of my mileage is towing. Maybe if Dodge had spent the effort prior to 2019 to address the well known fact that their ATX are lousy, and do something about it, I would still be driving a Dodge. I did like the 1996 diesel because of its simplicity. The 7.3L however is a vast improvement over the 2018 6.4 Ram Hemi and I would say performs better than the 1996 Ram Diesel. Ford at least for the model I purchased seems to have gotten it right and the gas mileage when I am towing is within 1 mile of the 2018 Ram. Time will tell. 1996 Ram diesel had significantly better MPG than both the Ram and Ford gas of today. The emission additions on the new diesels has done a number on MPG. I have had no issues with the 10R140 for my 2024. I know 2021 and 2022 had serious issues which were addressed in later years. So far, tow or no tow the transmission has been flawless. Maybe I have found a vehicle that will finally prove to be reliable and easy on the wallet when it comes to maintenance.

 

ffs. 3 posts up you said youve no interst in gm or ram.
your a koolaide drinker and dont even realize it

 

Loyalty isn't the opposite of dislike. Not being loyal to Ford doesn't mean im open to a brand I know has issues.

Growing up, my father's employer used GM and Ford trucks and their fleets the Ford trucks always outlasted the GM trucks. I grew up as a GM kid; so I was actually disappointed when I saw this. And their reliability today isn't great. So why would I consider them?

I also will not buy a Stellantis truck. Their products stink and are plagued with issues - all of them. God knows if they'll be in business in 5 years.

If a Tundra met my needs, I'd consider it. Right now im looking at a Ford because it is the only one that meets my size criteria. But if I find something else that works, ill look at it.

 

My 2016 RAM 2500 was a fantastic truck. I only switched to Ford because I wanted a wide track front end and RAM does not offer a pickup version of the 4500 like Ford does with the 450. I also have a 2017 Chrysler Pacifica that is in great shape, and a 2013 Town and Country before that.

I have owned plenty of vehicles, from trucks to cars and SUVs, from GM, Ford, and Chrysler - and none of them stunk or were plagued with issues.

 

I have a 23 F350 Platinum CCLB SRW 6.7HO with 3.31 gear. It currently has 72,000 miles. Probably 30,000 of that towing. The rest are commute miles

At 53,000-55,000 miles, I had numerous really harsh downshifts when towing up 6-7% grades at 50mph. I mean really harsh, Shake the whole truck like you ran over a 4x4 on the road.
Took it into the dealer and he basically said. No Codes, Can't reproduce, So drive it until it fails.
I got on the internet and folks were telling me it was the fluid in the TQ So I had the fluid replaced and a new filter put on. ( ford doesn't show that on maintenace untul 150,000 miles. ( Don't beleive that)
I've had Absolutely no problems with tanny after changing the fluid. I'm due to change it again, Since you only get about 1/2 of the fluid out when you drop the pan, So planned maintenace will be changing the fluid every 30,000 miles for me.

I've had a 2011, 2015, 2017, 2020 and now 2023 trucks with 6.7L engines. No CP4 failures. I typically run 100,000 to 150,000 miles on my trucks. But Ford has gotten awful proud of their new trucks and I think my 23 will have to run 300,000+ miles.

Just got home last night from hauling horses from Northern Utah to Southern Nevada for a New Years ride. Roughly 900 miles round trip and average 12.4 mpg towing a 13,000 lbs trailer. I'm vary happy with my 2023 truck.

 

How many miles did you put on each of them?