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Started By
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re: As of Dec 31, 2025 Allison and GM are divorcing.
Posted on 11/25/25 at 7:54 am to Gulf Coast Tiger
Posted on 11/25/25 at 7:54 am to Gulf Coast Tiger
Im on my third Silverado. Won't ever buy another one.
0
Posted on 11/25/25 at 8:09 am to WhiskeyThrottle
Well, the Aisin was always great behind the Cummins other than a brief manufacturing snafu. The ZF 8 speed they have now is spectacular but of course, they fricked up the engine post-2018 and what you get now is not worth the premium price they charge.
Pre-2018, you got (for the most part) a commercial cummins ISB6.7 school bus / garbage truck engine in the pickups. Solid lifters, CP3 fuel pump, cast iron everything. A heavy, noisy, dead nuts reliable engine. This was how Ram kept the cost of a diesel pickup comparatively low to Ford and GM for decades and developed a reputation for a piece of shite truck wrapped around the best engine. All of the RFE transmissions were shite heaps behind the diesel and require loads of torque management to live even a brief life of hard work which makes the truck feel like a complete turd compared to a ford or GM diesel.
Post 2018, because the old engine was too noisy, the engine turned into a hydraulic lifter GCI block CP4 fuel pump heap of shite. For a while there you could get a heap of shite engine with a heap of shite transmission behind it in a HD pickup truck for a $13k premium over a gas burner. Cool!
A 2014 to 2018 cummins (the best diesel ever put in a pickup truck) engine with the new ZF8 transmission would be the best driveline ever put in a pickup truck but alas, that would be too good of a good thing and would never exist.
Pre-2018, you got (for the most part) a commercial cummins ISB6.7 school bus / garbage truck engine in the pickups. Solid lifters, CP3 fuel pump, cast iron everything. A heavy, noisy, dead nuts reliable engine. This was how Ram kept the cost of a diesel pickup comparatively low to Ford and GM for decades and developed a reputation for a piece of shite truck wrapped around the best engine. All of the RFE transmissions were shite heaps behind the diesel and require loads of torque management to live even a brief life of hard work which makes the truck feel like a complete turd compared to a ford or GM diesel.
Post 2018, because the old engine was too noisy, the engine turned into a hydraulic lifter GCI block CP4 fuel pump heap of shite. For a while there you could get a heap of shite engine with a heap of shite transmission behind it in a HD pickup truck for a $13k premium over a gas burner. Cool!
A 2014 to 2018 cummins (the best diesel ever put in a pickup truck) engine with the new ZF8 transmission would be the best driveline ever put in a pickup truck but alas, that would be too good of a good thing and would never exist.
Posted on 11/25/25 at 8:12 am to Crappieman
So now is the time to buy a GM truck with a real Allison transmission and put it storage?
Grandson could profit
Grandson could profit
Posted on 11/25/25 at 8:18 am to Drew Peanuts
quote:
Amazing how many folks don't realize what they own. They just trust the badges.
serious question, how are you supposed to figure this out? If the badge is on the vehicle, is the physical part also not branded as allison?
I am not flaming you here, it's a legit question.
Thanks
Posted on 11/25/25 at 8:37 am to BabyTac
quote:
Toyota Tundra - 240,000 miles, never an issue.
Too bad Toyota didn't stick to their own guns. Our Toyota service dept is busier than ever...
Posted on 11/25/25 at 8:51 am to RichJ
my friend who has a 23 tundra just had the engine blow up on him at 23k miles. his vin didnt fall under the recall. toyota still fixed it for free though.
Posted on 11/25/25 at 9:20 am to soccerfüt
I’d rather watch the detectives.
Posted on 11/25/25 at 10:10 am to NorCali
quote:
how are you supposed to figure this out? If the badge is on the vehicle, is the physical part also not branded as allison?
You don't without some serious detective work, and it ultimately doesn't matter anyway. The builder/supplier relationships are super difficult for the average dude to decipher when it comes to passenger vehicles because everything is so minutely specialized to mass production that virtually no components are off the shelf items.
IE you can buy a Cummins-powered ram truck, but the engine in that truck is so specialized to that particular truck that just about the only thing it has in common with the rest of Cummins' product catalog is the name. Now that's probably the least true for the Cummins engine relative to all of the other components in a vehicle but you get the idea. The primes (GM, Ford, etc) have so much direct involvement in the design of the major components that it doesn't really matter what brand product it is or what their reliability / value / etc really are in other markets, you're getting a product of the company who's badge is on the grille and that's all that really matters to the end buyer.
There's no use in nerding out what will last the longest or what has the most power or whatever it is. It's a hunk of metal to haul your arse and your stuff from point A to point B and the manufactures have succeeded in masking every pertinent piece of information there is on how much money it will cost you to do that for 20 years with a given vehicle.
So, just buy what you like, drive it till you don't like it anymore, then get something else. No matter how much someone prides themselves on researching shite to the Nth degree and figuring out every detail and patting themselves on the back for making some genius vehicle purchase, they really didn't. Reliability and repair data is the second most closely guarded secret a vehicle company keeps, and you really don't know shite no matter how hard you worry about it, so don't bother.
Posted on 11/25/25 at 10:38 am to BHM
quote:
If I understand this correctly, starting back in 2020, GM stopped using the Allison transmissions and began using their own HD 10 speed codeveloped with Ford.
I thought that 10 speed was for light duty trucks. They been putting that in the diesels?
If so, there is now zero reason to buy a GM diesel. The duramax is shite and hard to work on. And now the transmission is shite if it’s that 10 speed.
Posted on 11/25/25 at 10:41 am to Crappieman
quote:
I'd really love to see Allison design a HD transmission for Ram Trucks with Cummins engines.
Could you imagine the people that would be demanding Toyota take their money if a good Cummins was mated to a good Allison Transmission in a Toyota 3/4 and one ton? Huuuuge potential. Toyota would end Ford, GM, and Dodge heavy duty trucks.
This post was edited on 11/25/25 at 10:43 am
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