Eaton HO72 rear axle

[RPOZ11]

I'll get there.
Had a few expenses slow me up.

When we installed the Timken Bearings,
The 388 race was miss-boxed.
It had a 382-A 14 Bolt race inside the 388 box.
Luckily I had new Timken Bearings present to cross reference this.

So good to check and double check these things

[RPOZ11]

Finally getting ready to order up axles for this.
Below in the image are the numbers I determined for the factory dimensions.
I did measure the depth that the 17 spline axles have.
Installed, taking into account the 17 spline locker, you are left with a maximum 5/8" clearance before the axles actually touch.
I compared my 14 Bolt axles at where they are splined to the original 17 splined axles and both appear to have similar diameters.
The HO72 axles were about .025 larger.
I went with the 14 Bolt size because I am using an Eaton 30 spline locker designed for the 14 Bolt axles.
The 14 Bolt axles were 1.500.
Add:
Axle flange thickness : .390
Axle bearing landing where hub bearing rides : 1.440
I hope these are all correct.
To be splined for 30 teeth.

[RPOZ11]

Axles arriving today
I'll post pics of these asap

[RPOZ11]

Done

[bry593]

I know this thread is a few years old, but just wanted to say thanks! You did a great job documenting what has become increasing obscure knowledge of the HO52/72.

My plans are to transplant an original Eaton no spin / Detroit Locker into my HO52. Which leads to my question, if you had an original no-spin to begin with, why bother converting it to a 14-bolt no-spin?

Again, this is the best documentation I have found. Thanks!

EDIT:
Anyone know if the 1966 and older trailing arm HO52/72 axles share the same perch spacing as 1967 - 1972 trailing arms?

[RPOZ11]

Increasing to the 30 tooth count from the 17.
Stronger and the 14 bolt locker is readily available.
Although the costs to make the axles were a factor, I felt doing this allowed me piece of mind driving with this setup.
I cant imagine trying to locate the inner locker gears mating to the stock spline axles.
Piece of mind I suppose by preserving the original unit.
Ive got one more housing to do a correct rebuild.

[bry593]

I thought you were going to use the Escalade hub seals? I know you had pics of them, but in your "hub test fit" pic above, I'm seeing the old style seal. Was there a problem with the Escalade seals? I ask because I am ordering parts for my HO52 and had planned on the new style seals.