Looks like Allison is really mad at GM

[Homer1959]

Anyone know how many 10L1000 are on the road ? Let say since 2022 Are those numbers available somewhere ? 

[Chuck FB]

1 minute ago, Homer1959 said:

Anyone know how many 10L1000 are on the road ? Let say since 2022 Are those numbers available somewhere ? 

2020 was I believe the first year for them behind the Duramax and as you may know a lot of the HD trucks GM builds are Duramax as the gas version takes second fiddle and by a long shot at some dealerships. 2024 being the first year for that "similar" 10L1000 trans for the gas and here we are with 2026 models having been out for a few months now. That should add up to one whack of 10 speed Allision branded transmissions out there. 

[Homer1959]

12 minutes ago, Chuck FB said:

2020 was I believe the first year for them behind the Duramax and as you may know a lot of the HD trucks GM builds are Duramax as the gas version takes second fiddle and by a long shot at some dealerships. 2024 being the first year for that "similar" 10L1000 trans for the gas and here we are with 2026 models having been out for a few months now. That should add up to one whack of 10 speed Allision branded transmissions out there. 

A grain of salt is always the best way too go with the internet. I had a f150 2014 and despite what one can read on the internet, my phasers and chain never failed, nor the turbos

[Chuck FB]

3 minutes ago, Homer1959 said:

A grain of salt is always the best way too go with the internet. I had a f150 2014 and despite what one can read on the internet, my phasers and chain never failed, nor the turbos

I am not sure how many km you had on your truck but a mechanic that runs his own shop in town gets all sorts of Ford 5 and 3.5 engine trucks falling into his lap and often as a last ditch effort to somehow magically repair the mess because in some cases its already just been to the dealer where they spent many thousands on doing a timing chain job and for "some reason" things are still not working right and I believe its come down often to one factor, they simply did not change the engine oil often enough for the type of use they were giving their truck and ruined their engine as he figures out that the bottom end is shot on the engine that they had all this recent prior work done on. 

[Capt Bob]

8 hours ago, Silverado4x4 said:

Not going to hurt their sales at all. I bet 98% of the people who buy these trucks with the Allison don't even know what an Allison transmission is.

Well I knew, but then I had been following the 10 speed rumors in the gas model HD for several years and pulled the trigger in 2024. This has been around the internet for a while but…

When we were camping last January the family’s tow vehicle next to us was a Chevy 2500HD. We commented on each others choice of vehicles and the biggest selling point for the guy was in fact the “ Allison transmission”. I didn’t try and correct him but I’m inclined to think the percentage, while maybe not 98%, is still rather high. 

[Homer1959]

2 hours ago, Chuck FB said:

I am not sure how many km you had on your truck 

Low mileage at 125,000 km, but 90% of that was pulling my travel trailer weighing close to 8,000 lbs. I didn’t baby it either. That truck was maxed out in every corners but never above the spec sheet. Oil changes were once a year or whenever the OLM indicator signaled. It rattled only once, three years ago—maybe just a coincidence? At the time, I had installed a FRAM Ultra, the first time I didn’t use an OEM filter. I immediately replaced the filter, and it never rattled again. Coincidence?

[Chuck FB]

19 minutes ago, Homer1959 said:

Low mileage at 125,000 km, but 90% of that was pulling my travel trailer weighing close to 8,000 lbs. I didn’t baby it either. That truck was maxed out in every corners but never above the spec sheet. Oil changes were once a year or whenever the OLM indicator signaled. It rattled only once, three years ago—maybe just a coincidence? At the time, I had installed a FRAM Ultra, the first time I didn’t use an OEM filter. I immediately replaced the filter, and it never rattled again. Coincidence?

You will never know but eventually those engines do have turbo failures ( certainly have heard of that around here with past 3.5 owners when the truck was still on warranty ) and valve train or should say valve drive train issues as that long long chain wears and sooner or later becomes an item that needs replacing and its a very expensive process to have a shop replace it. You got a lot of heavy towing use out of it, count yourself lucky and hope that your new truck does as well as it did. And your new truck is without a doubt or at least in my mind the more capable unit due to its weight in a bad weather/wind situation. 

[BuckWallace]

4 hours ago, Capt Bob said:

Well I knew, but then I had been following the 10 speed rumors in the gas model HD for several years and pulled the trigger in 2024. This has been around the internet for a while but…

When we were camping last January the family’s tow vehicle next to us was a Chevy 2500HD. We commented on each others choice of vehicles and the biggest selling point for the guy was in fact the “ Allison transmission”. I didn’t try and correct him but I’m inclined to think the percentage, while maybe not 98%, is still rather high. 

I think the 98% is accurate if you're describing people who think they actually have an Allison transmission. Most people don't research everything to death on the internet and probably think if a manufacturer says "Allison transmission" then it's an Allison transmission rather than "hey, I better go research this to make sure it's actually an Allison".

Edited November 4, 2025 by BuckWallace

[Z45]

One of the Duramax forums used to have an Allison engineer on there (aprox. 10 yrs back) and he had lots of info. But as always happens, keyboard experts (in their own minds) drove him away and he never came back. 

Edited November 4, 2025 by Z45

[Homer1959]

16 hours ago, Chuck FB said:

You will never know but eventually those engines do have turbo failures ( certainly have heard of that around here with past 3.5 owners when the truck was still on warranty ) and valve train or should say valve drive train issues as that long long chain wears and sooner or later becomes an item that needs replacing and its a very expensive process to have a shop replace it. You got a lot of heavy towing use out of it, count yourself lucky and hope that your new truck does as well as it did. And your new truck is without a doubt or at least in my mind the more capable unit due to its weight in a bad weather/wind situation. 

The new truck is a complete game-changer compared to the old one, much better in every aspect. The only slight disappointment is the engine power. Yes, the truck is heavier and all that, but the little 3.5, in terms of power alone, can hold its own against the 6.6. Not talking about long-term longevity or reliability, just pure power for power. I love my new truck and I have no regrets 

[newdude]

21 hours ago, Homer1959 said:

Anyone know how many 10L1000 are on the road ? Let say since 2022 Are those numbers available somewhere ? 

 

 

N242454440 recall which was the 2020-2022 reprogram the TCM to detect valve body failure.

 

Per that recall, it covered 461,839 total trucks (LD and HD with 10 speed and diesel) for 2020-2022 model years. 

 

HD specific, that was 166,541 Silverado HD and 135,323 Sierra HD.  So just for those three model years, 2020, 2021 and until January 11, 2022 (past that date they have the updated software) they produced 301,864 Duramax 10L1000 powered HD trucks.  

Edited November 4, 2025 by newdude