CK5
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One Piece at a Time: My 1985 Diesel Suburban

Yeah Dodge runs the 10.5 in lighter duty early common rail trucks and then switched to the 11.5 I was not sure what GM ran in what trucks as far as 10.5 vs 11.5
I think they still use in 10.5 in vans. But the truck stuff changed along time ago.
I think the Early stuff, was 10.5 in the gas with 11.5 in the 8.1 trucks and dmax stuff.
I plucked my 11.5 out of a 6.0 one ton truck if I recall correctly.

So I'm not 100% sure how all the cookies crumble with 3/4- 1 ton stuff vs the 6.0/8.1/6.6 stuff.
 
2001 is when they made the switch to aam.
I assume this is a 11.5 otherwise I am not sure the point of the upgrade? Unless your after the fact-tree disks.
This is the 10.5, and you're exactly right. I want the factory discs and parking brake, and that's just not easily backwards-compatible to my '81 14FF. It just made more sense to find and build another good axle.

David
 
This is the 10.5, and you're exactly right. I want the factory discs and parking brake, and that's just not easily backwards-compatible to my '81 14FF. It just made more sense to find and build another good axle.

David
I did the same.
By dumb chance I ended up with the 11.5. I was after the brakes. Not the axle directly.
 
This is the 10.5, and you're exactly right. I want the factory discs and parking brake, and that's just not easily backwards-compatible to my '81 14FF. It just made more sense to find and build another good axle.

David
So was this out of a van or truck?
 
At one time Cut Bros made an adapter to put those factory disc brakes on older 14 bolts. They were having internal problems and splitting up but one of them was going to make another small run of parts a few months ago.
 
At one time Cut Bros made an adapter to put those factory disc brakes on older 14 bolts. They were having internal problems and splitting up but one of them was going to make another small run of parts a few months ago.
How much were they? I can't speak for David but I bought my factory disk brake rear end for 75 bucks.
 
They were expensive, $200ish for a couple of dual bolt pattern adapters. It’s a lot over a $75 bolt in axle but if the new axle needed to be regeared, etc it might not be too bad.

Cut Bros are also the ones that pioneered the D60 to big Dodge brake conversion.
 
They were expensive, $200ish for a couple of dual bolt pattern adapters. It’s a lot over a $75 bolt in axle but if the new axle needed to be regeared, etc it might not be too bad.
To your point I have to regear mine. But in fairness I didn't have a 14 bolt before. I was going from 1/2 ton 12 bolt to 14.
So a rear was needing a regear regardless of the brakes or not.
I assume these disk brake 14 bolts being in production for 20 years now that it doesn't make a whole lot of sense to even mess with a older one.
IMO.
 
So was this out of a van or truck?
Truck, but my understanding is that they’re all the same now - 69” wide. That’s 1/2” off from the 60 front.
At one time Cut Bros made an adapter to put those factory disc brakes on older 14 bolts. They were having internal problems and splitting up but one of them was going to make another small run of parts a few months ago.
I remember seeing those a while back, and it was of some interest, but they were something like $250 a pair and the mating GM parts added up quickly such that I could be into that brake project for the same/similar cost of just changing gears in a newer axle.

Fortunately, these axles are plentiful, now, and you can pick and choose to find a good deal.

David
 
FYI: the 10.5" 14 bolt only came in the 6.0L equipped 2500 trucks. 8.1's and dirtymax engines got the 11.5" axle.

I don't think transmission choice had any influence on the rear axle, just the engine.
 
Truck, but my understanding is that they’re all the same now - 69” wide. That’s 1/2” off from the 60 front.

I remember seeing those a while back, and it was of some interest, but they were something like $250 a pair and the mating GM parts added up quickly such that I could be into that brake project for the same/similar cost of just changing gears in a newer axle.

Fortunately, these axles are plentiful, now, and you can pick and choose to find a good deal.

David
Hmm... So they did still put a 10.5 rear in trucks. At least up to 07. Interesting. Guess I was wrong Luke. I'm not sure how gm did it then.
 
FYI: the 10.5" 14 bolt only came in the 6.0L equipped 2500 trucks. 8.1's and dirtymax engines got the 11.5" axle.

I don't think transmission choice had any influence on the rear axle, just the engine.
Is that true for all years? Obviously the 8.1 died off. So the Duramax only was getting the 11.5 from then on?

What about the base engine 1 tons?
 
Is that true for all years? Obviously the 8.1 died off. So the Duramax only was getting the 11.5 from then on?

What about the base engine 1 tons?
One tons got the 11.5" I believe even with the 6.0 due the weight rating they carry. I can say a 1 ton with a 6.0 is a pretty rare bird for a gmt800 truck , gmt900 or the K2xx generation. Most one tons are dirtymax trucks up to when the 6.6 gassers hit this year. We've already sold two of those.
 
One tons got the 11.5" I believe even with the 6.0 due the weight rating they carry. I can say a 1 ton with a 6.0 is a pretty rare bird for a gmt800 truck , gmt900 or the K2xx generation. Most one tons are dirtymax trucks up to when the 6.6 gassers hit this year. We've already sold two of those.
I think they might be less of a rare bird here. I could find you any number of 6.0 one tons running around. Guessing thats due to the flat land here. A Heavy duty truck without that whistle maker is pretty useless in the mountains.
 
I think they might be less of a rare bird here. I could find you any number of 6.0 one tons running around. Guessing thats due to the flat land here. A Heavy duty truck without that whistle maker is pretty useless in the mountains.
I'd agree. I'll adjust my statement, most of the one tons we see here in Colorado are dirtymax trucks.

The 10.5 axle does not have the increased weight capacity of the bigger brother 11.5. So it is the main axle for all one tons from the gmt800 trucks and up. I'm not remembering any Dana 70/80's on the dedicated chassis çab trucks either.
 
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