All 2024 GM HDS get the 10 speed Allison.
According to a sales guy, so take it with a grain of salt, the price will go up across the board by $3K to $5K for the 24 models. With the current state of the economy he is probably corre...
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Interestingly enough, whoever "Motorbiscuit" is, they think that Ford and GM did co-design the HD tranny, not the cars and 1/2 tons. I don't really know who designed what.....But what I know is before the Allison 1000 appeared all the overdrive automatic trannies whether behind a diesel or a strong gasser, they're(their?) days were numbered. They all caved in if you put much load on them. So Allison or not, at least now-a-days, you can get from coast to coast and not worry so much about the tranny grenade-ing in all the big three. Also, I've read that the 10 speeds tend to hunt a bit when you get into hills...hunting bugs the heck out of me and I'm glad mine just stays in 6th going up and down hills.
