I was bounceing around on different web sites so I can't remember where I heard it. but this one site said that GM is dumping the 10 speed Ford -GM 10 speed Allison trans as they are having alot of failures. and that their going to switch to a 8 speed trans anybody else heard anything about that are the 10 speeds blowing up are what?
krh
There was a thread on here recently where a couple members were debating about the new trans, and GM's official word was that the 10sp collaboration with Ford is on the half ton trucks and is a different platform than the one in the Duramax platform. So maybe they're referring to the trans in the half tons?
Just the opposite actually. I go to the biggest Chevy dealer in the country and last month when I asked last month if any of the new 10 speeds were coming back with issues. The service director and my SA who I have had for over 20 years said no not at all. Taking my 2020 in next week--already time for a tranny oil change. The internet is a funny place for information--lots of garbage out there. 
Here is a link to a GM Video with the "Assistant Chief Engineer" talking about the 10L1000 Transmission, not to be confused with the 1/2 ton 10 speeds that were built in collaboration with Ford. He talks about this at 2:20 into the video.
And additional information on both Ford and GM / Allison 10 speeds used in 3/4 and 1 ton applications and it says in both of these links that GM and Ford did not collaborate on these transmissions.
www.dieselhub.com
GM/Allison 10L1000 10 Speed Automatic Transmission Specs & Ratios
Allison 10 speed automatic transmission specs and gear ratios. The Allison 10L1000, manufactured by GM, was introduced for the 2020 Chevrolet Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD. It features 10 forward speeds, sophisticated powertrain integration, and a chain driven PTO system.
www.dieselhub.com
Ford 10R140 TorqShift 10 Speed Automatic Transmission Specs & Ratios
Ford 10R140 TorqShift transmission specifications, gear ratios, and operational features. The 10R140 TorqShift is a 10 speed automatic transmission developed for and introduced to the Ford Super Duty platform (F-250, F-350, F-450, F-550, F-600) for the 2020 model year. The 10R140 10 speed...
www.dieselhub.com
@Millsrv ,
Do you realize that @Mike L. is the Mike L of inglewood transmissions? The guy wrote the book on "built" Allison transmissions. He is also the same gentlemen who was first to tear apart the new 10 speed.
From the beginning of your tenure here, you've been very hard on people saying the new 10 speed is a cooperative design with Ford. Mike has provided the community inside information that it is.
I've sat on the sidelines now for a bit, and I'm calling you out now respectfully. Posting marketing Youtube videos is not the same as the inside info Mike has given us.
If Mike says stock transmissions under stock power levels have failed, then consider him an expert in the field.
I challenge you to provide expert info the new 10 speed is a unique GM design. Until that time, I'll take Mike for his word.
Do you realize that @Mike L. is the Mike L of inglewood transmissions? The guy wrote the book on "built" Allison transmissions. He is also the same gentlemen who was first to tear apart the new 10 speed.
From the beginning of your tenure here, you've been very hard on people saying the new 10 speed is a cooperative design with Ford. Mike has provided the community inside information that it is.
I've sat on the sidelines now for a bit, and I'm calling you out now respectfully. Posting marketing Youtube videos is not the same as the inside info Mike has given us.
If Mike says stock transmissions under stock power levels have failed, then consider him an expert in the field.
I challenge you to provide expert info the new 10 speed is a unique GM design. Until that time, I'll take Mike for his word.
You are certainly entitled to your opinion and good for you on taking Mike's word. If being hard on people by pointing out my sources for information then I suppose you are right. I do not have to prove anything nor do I care if you or anyone else believes what I post or not. I am simply showing my sources of information and what I believe to be true. Just because I have never heard of Mike L. or Inglewood Transmissions is fine I will take his "expert information" as valued also, this is how I do my research. This is not a game of who is right or wrong, it is simply information.
Ok, fair enough. I think I also read too much into your last post as well. Too much coffee. My apologies...
All and all, it is unfortunate as to some of the design decisions of this new transmission. Performing a fluid change is no longer a straightforward process. I know they had to make a new one at some point, but give us the ability to service it.
All and all, it is unfortunate as to some of the design decisions of this new transmission. Performing a fluid change is no longer a straightforward process. I know they had to make a new one at some point, but give us the ability to service it.
The last true Allison "built" transmission was the 6spd in the GMT-800 platform that ended in 2007. The GMT-900 platform (2007.5+) are Allison 1000's built by GM at their transmission factory under license by Allison.
The new 10spd is Allison branded only. Nothing in the 10spd was built or designed by Allison per
Mike L....
The new 10spd is Allison branded only. Nothing in the 10spd was built or designed by Allison per
Mike L....
My 2023 GMC Duramax AT4 with 19k miles the transmission went out while I was on a vacation about 300 miles from home. They had to replace it. It took 3 weeks to get the truck done. I pay for the onstar service as well. While they replaced it they didn't provide a rental at all. We had to get a rental car on our own and then get a rental to go back and pick it up. Totally not impressed. Bought a 100k truck never thought I would be stuck while out on the road.
That’s unacceptable in my opinion…! I have heard from friends that purchased a newer truck with the 10 speed with pros and cons. I have a 2019 with the last year of the 6- speed Allison. Tried and true. Im sticking with it.
I hope the dealership makes it right with you. That’s just shameful in my opinion….
I hope the dealership makes it right with you. That’s just shameful in my opinion….
22 L5P w/10spd. I am starting to wonder if changing the ATF on an earlier schedule would be a good thing. Maybe 40K? I cannot see how it could hurt. Would the valve body have a longer life with an earlier ATF change or does it not care? From driving less than robust trucks over the previous years I made a habit of early ATF changes, keeping cooling stack clean and letting them idle down a bit if I was towing heavy. Most all my trucks had an accessory cooling fan but I don't see the need on these.
Love it when a newbie posts his first post to a 2+ year old thread flaming a brand because he happened to have an issue. Hope he gets it worked out and if he is smart at all he has a case opened with GMC.
Anywho, will be interesting to see how these trans and valve bodies hold up. We haven't really heard of many issues on here, some here and there.
I had two sets of clutches and a torque converter replaced at 7k ish, in the shop for 3 months waiting on national back ordered parts, GMC case worker took care of me. It sucked, truck runs like a charm now. We also know professional drivers on here with 200k + on there trucks towing heavier and harder than most ever will and have no trans issues.
Lugging?? what lugging?? I wish they would lug a bit, especially not towing, keeping the rpms in peak torque all the time is part of what kills the fuel economy in my opinion.
Anywho, will be interesting to see how these trans and valve bodies hold up. We haven't really heard of many issues on here, some here and there.
I had two sets of clutches and a torque converter replaced at 7k ish, in the shop for 3 months waiting on national back ordered parts, GMC case worker took care of me. It sucked, truck runs like a charm now. We also know professional drivers on here with 200k + on there trucks towing heavier and harder than most ever will and have no trans issues.
Lugging?? what lugging?? I wish they would lug a bit, especially not towing, keeping the rpms in peak torque all the time is part of what kills the fuel economy in my opinion.
10R140 and 10L1000 info .....
10R140 Transmission Identification
The 10R140 is often confused with the Ford model 10R80 transmission and is commonly misquoted as being a relative of the Allison 10L1000 ten speed automatic transmission employed behind GM's 6.6L Duramax diesel. The light duty Ford 10R80 and GM 10L80 ten speed automatic transmissions are indeed the result of a joint venture between GM and Ford Motor Company, and thus there is significant parts commonality between the two transmissions. The GM-Allison 10L1000 and Ford 10R140 are two entirely different 10 speed automatic transmissions with zero parts commonality, alternative gear ratios, and separate transmission features.
The 10R140 is quickly identified by its composite fluid pan, which secures to the bottom of the transmission with 20 metric bolts (see figures 3 and 4 below). Additionally, the 10R140 oil cooler is uniquely mounted beneath the bellhousing of the transmission (see figure 6 below). A heat shield protects the passenger side the transmission pan from heat radiating off the exhaust aftertreatment system. The fluid pan features a large, serviceable o-ring type gasket (figure 5 below) secured within a integral groove in the fluid pan mounting flange.
A 10R140 logo is also cast into the transmission case near the range selection shift lever on the driver side of the transmission. Additionally, the transmission part number and shift solenoid information labels are visible in this general region (see figure 7 below). A large connector travels through the case near the rear of the transmission on the driver side and attaches to the chassis wiring harness (see figure 8 below).
![10r140 transmission logo embossed in case]( "10r140 transmission logo embossed in case")
Figure 7 - 10R140 transmission designation and logo cast into the transmission case
Ratios are different:
Allison 10L1000 10 Speed Automatic Transmission Ratios
10R140 TorqShift 10 Speed Gear Ratios
10R140 Transmission Identification
The 10R140 is often confused with the Ford model 10R80 transmission and is commonly misquoted as being a relative of the Allison 10L1000 ten speed automatic transmission employed behind GM's 6.6L Duramax diesel. The light duty Ford 10R80 and GM 10L80 ten speed automatic transmissions are indeed the result of a joint venture between GM and Ford Motor Company, and thus there is significant parts commonality between the two transmissions. The GM-Allison 10L1000 and Ford 10R140 are two entirely different 10 speed automatic transmissions with zero parts commonality, alternative gear ratios, and separate transmission features.
The 10R140 is quickly identified by its composite fluid pan, which secures to the bottom of the transmission with 20 metric bolts (see figures 3 and 4 below). Additionally, the 10R140 oil cooler is uniquely mounted beneath the bellhousing of the transmission (see figure 6 below). A heat shield protects the passenger side the transmission pan from heat radiating off the exhaust aftertreatment system. The fluid pan features a large, serviceable o-ring type gasket (figure 5 below) secured within a integral groove in the fluid pan mounting flange.
A 10R140 logo is also cast into the transmission case near the range selection shift lever on the driver side of the transmission. Additionally, the transmission part number and shift solenoid information labels are visible in this general region (see figure 7 below). A large connector travels through the case near the rear of the transmission on the driver side and attaches to the chassis wiring harness (see figure 8 below).
Figure 7 - 10R140 transmission designation and logo cast into the transmission case
Ratios are different:
Allison 10L1000 10 Speed Automatic Transmission Ratios
1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | R |
4.54 : 1 | 2.86 : 1 | 2.06 : 1 | 1.72 : 1 | 1.48 : 1 | 1.26 : 1 | 1.00 : 1 | 0.85 : 1 | 0.68 : 1 | 0.63 : 1 | 4.54 : 1 |
10R140 TorqShift 10 Speed Gear Ratios
Gear | Ratio |
1st | 4.615 : 1 |
2nd | 2.919 : 1 |
3rd | 2.132 : 1 |
4th | 1.773 : 1 |
5th | 1.519 : 1 |
6th | 1.277 : 1 |
7th | 1.00 : 1 |
8th | 0.85 : 1 |
9th | 0.687 : 1 |
10th | 0.632 : 1 |
Reverse | 4.695 : 1 |
Ford 10R80, GM 10L80 10 Speed Transmission
10R80, 10L80 10 Speed Automatic Transmission Specs
The 10R80/10L80 10 speed automatic transmission is the result of a collaboration between Ford Motor Company and General Motors. Ford refers to the transmission as the "10R80", while GM has designated it the Hydra-Matic 10L80 (Hydra-Matic being GM's long running trademark). Looking at the big picture, the GM and Ford versions of the transmissions are physically identical; the primary differences between the two variants lies in the electronic controls, which are closely integrated with each manufacturer's respective powertrain options.
Ford 10R80/GM 10L80 Transmission Ratios
*Note - GM and Ford report slightly different gear ratios as a result of preferences in rounding
10R80, 10L80 10 Speed Automatic Transmission Specs
The 10R80/10L80 10 speed automatic transmission is the result of a collaboration between Ford Motor Company and General Motors. Ford refers to the transmission as the "10R80", while GM has designated it the Hydra-Matic 10L80 (Hydra-Matic being GM's long running trademark). Looking at the big picture, the GM and Ford versions of the transmissions are physically identical; the primary differences between the two variants lies in the electronic controls, which are closely integrated with each manufacturer's respective powertrain options.
Ford 10R80/GM 10L80 Transmission Ratios
1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | R |
4.70 : 1 | 2.99 : 1 | 2.15 : 1 | 1.80 : 1 | 1.52 : 1 | 1.28 : 1 | 1.00 : 1 | 0.85 : 1 | 0.69 : 1 | 0.64 : 1 | 4.87 : 1 |
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