The Stovebolt Site Forums The Parking Lot Tons 'o Fun 1 ton rear axle, same for Single and Dual wheel trucks?

Can someone please help interpret and confirm if the Eaton H-072 rear axle as used in the single and the dual wheel 1 ton AD trucks (47-54) are the same or not?
Specs from shop manual on this (and other) axles.

I'm thinking same because if any difference it'd likely be in hub, drum, and overall width. Excepting a possible difference in stud length for one or two wheels.
The 1 ton GMC is approximately model 250.. I haven't yet made sense of the model numbers, adaptations, preceding letters, following numbers, and how to interpret all that in the parts book.

Rear drums, 14x2.5" parts catalog PICTURE I don't see any differentiation for single or dual wheel truck?
Rear hubs parts catalog PICTURE part 2059324 note says "with standard axle & dual wheels".

Finally, complete axle listing in the parts book PICTURE
Axle part number 3693825 fits 18 X 5.00" 8 stud wheel "same as STD axle except wheel bolts".
Standard axle is 3693800.

So if I'm reading all that correctly if the AD 1 ton truck had single or dual wheels the rear axle complete including brakes and hubs are all the very same parts with exception of the wheel stud length?

To add to the above I had measured my old 52 1 ton single wheel axle to be 62-5/8" wide and the 51 GMC dual wheel axle recently measured at 62-7/8" So pretty much the same Wheel Mounting Surface to "WMS" measurements.

Grigg

Pick a year, Grigg, and then look at the info in that year's Specification Manual (I think it will be in there):

http://chevy.oldcarmanualproject.com/chevyresto/index.htm

Grigg,

Probably no help, but as you know, my 53 HO72 Dually rear is out of the truck and easy to measure if you need anything. Complete, drum to drum, minus the carrier.

Larry W.

Thanks Tim, that also looks like they're the same but less detail, less conclusive, than the parts book.

I think I have presented enough pertinent information in those parts book pages/pictures linked already? But I'm not fully confident I'm reading it right.

Some day at a Stovebolt gathering we should have a classroom lesson on how to use and understand the old GM parts books. I'd sign up for that real quick!

Larry, what I don't have on hand is a single wheel axle to compare side by side with my dual.

Grigg

Grigg,

Gotcha, I was thinking you had one in the red truck.
Disregard.

Larry W.

Gave it away years ago..

DOH!!

Well I wish we would have had this conversation 3 months ago when I had a 1-ton Single wheel axle laying on the ground behind my shop. I have some pictures of the 5.14 gears with PN# and some of the axle itself but not too may measurements.

Again, DOH!!!

Um, I *do* have an HO72 sitting on jack stands in my shop at this very moment. And it is the one Grigg gave away. If someone would coach me through the measurements to take, I will gladly make the attempt...

Thanks John,
Not sure what to have you measure. We've already confirmed the axle width from WMS to WMS is the same, and spring perch locations too.
I was more thinking looking at them side by side might notice any difference.

Again though, pretty sure I have posted the necessary information in the first post. Various pages from the parts catalog, is there a better source to reference?
What I really need help with, and or a second opinion on, is do these pages and part listings confirm that they're the same axle except stud length? I think so but I could also be wrong.

Grigg

wouldn't this mean if you had a dually truck you could just put SRW small offset wheels on it and it's then a SRW truck? thought there was more too it than that...

Saw truck, what's that?

Are on asking is can you put single wheels on the rear of your Dually truck and is it same as a factory single wheel truck? I believe so, studs will be a tad bit longer but that's no problem, nothing to worry about.

interesting to stumble across this thread today.......

My 46-72 GM parts book does not list either housing or hub for HO72. But I can say that dual and single studs are different part numbers. Axle shafts carry the same part number for 3/4 and 1 ton single or dual wheels.

I may be in need of a 5:13 carrier assembly or at least a pinion bearing if they are available. I looked up the bearing number but of course it's been superseded. It's a unique bearing and I suspect only made for Eaton. I haven't tried NAPA. My FLAPS closed up last Thursday and the parts man is retiring. He is a gem and will be sorely missed.

oops! auto correct. now a saw truck! SRW truck