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Eaton HO72 Tech Thread

Do u no what the guys wants for it? I can’t get registered on that forum been trying for months and it won’t let me…
 
Going to pick it up this coming weekend if all goes well 😎
 
Does anyone have CAD files of a fabricated housing for the HO72?

I think blazerboy on the old site worked for ruffstuff and made some but I can’t get in contact with him
 
gtxracer2 had put in a lot of time on designing some Eaton stuff; however I believe part of that work is for his business doing CAD R&D so he may want some $ for his time. No idea, just going off what I've seen him up to over the interwebs outside of here.

06h3 said:
Does anyone have CAD files of a fabricated housing for the HO72?

I think blazerboy on the old site worked for ruffstuff and made some but I can’t get in contact with him
Click to expand...
 
Just an idea, but if the centerline distances are close enough, one could design a adapter ring that bolts into a 9" housing (think spidertrax or equivalent) and with the right thickness, make the HO center section bolt into said housing.

That way you run a standard, easy to get housing and / or could convert an existing setup from a 9" to a HO third.
 
Bebop said:
Just an idea, but if the centerline distances are close enough, one could design a adapter ring that bolts into a 9" housing (think spidertrax or equivalent) and with the right thickness, make the HO center section bolt into said housing.

That way you run a standard, easy to get housing and / or could convert an existing setup from a 9" to a HO third.
Click to expand...

And the adapter is a simple flat plate of a specific thinkness so easy and cheap to make...

You might need to clearance the 9" housing for the bigger ring gear.
 
arse_sidewards said:
And the adapter is a simple flat plate of a specific thinkness so easy and cheap to make...

You might need to clearance the 9" housing for the bigger ring gear.
Click to expand...
Correct on both accounts but that appeared to be easier to do than building a custom housing from scratch
 
Same concept on a H233B third in a Spidertrax housing

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Bebop said:
Just an idea, but if the centerline distances are close enough, one could design a adapter ring that bolts into a 9" housing (think spidertrax or equivalent) and with the right thickness, make the HO center section bolt into said housing.

That way you run a standard, easy to get housing and / or could convert an existing setup from a 9" to a HO third.
Click to expand...
I like the idea of a HO729 axle!
 
I do too. Sucks that the third has so limited aftermarket support.
 
I’m willing to pay for the files, I get it took a lot of work or if a 9in housing works I’d be open to that. I am considering widening the housing if I link my rear suspension but I figured if I’m gonna widen it, I should see if I can get a fab housing
 
I personally don't think trying to make a 9" housing work is really all that worth it. I mean, what is wrong with the factory housings anyways, aside from the width? And if they need to be widened or narrowed, the ID is pretty easily matched with decent size heavy wall tube. When I built my front, I had some minor machine work done on a set of '79 Ford D60 tubes and they slid right in, the alignment bar set it all up and bing bang boom welded it all together. I image the same could be done with any old 14 bolt tubes as well. I've never heard of a failed stock housing, or notched housing, etc. They aren't that heavy either in stock form.

I have a pair of steering axles to build for a friend later this year, maybe we'll go scratch housings too. I started gathering parts to build an IFS/ IRS setup for one too but ended up getting sidetracked with other things in life.
 
I built my front Dana 70 and did the inner machined slug trick. I may just do that on the rear of a housing
 
Blazerboy used a Ruffstuff housing for his custom Eaton housing. I have some files but never finalized them. Your best bet for a fab H072 housing is to call Ruffstuff or Spidertrax and plead to have it made/adapted. The centerline of the axles to the mounting face plane of the third member is your biggest concern.
 
gtxracer2 said:
Blazerboy used a Ruffstuff housing for his custom Eaton housing. I have some files but never finalized them. Your best bet for a fab H072 housing is to call Ruffstuff or Spidertrax and plead to have it made/adapted. The centerline of the axles to the mounting face plane of the third member is your biggest concern.
Click to expand...
Ruffstuff is not what they used to be.

I doubt I will get far with them. Last time I talked HO72 talk with them I was told they are not fans and they are irritated they made HO72 diff covers and nobody bought them.

I told them that’s because people begged for years. They never made them, everyone went out and bought diff covers off a guy on eBay or built their own. They were late to the game.

This wasn’t from Dan but not a regular sales guy either. He was a manager of some sort.
 
Is it true that my 1953 eaton w the slip on drums, won’t work w the disc brake kites because the hub won’t be spaced correctly? I’m going to pick up another this weekend, hopefully is has the stud retained hubs I guess. Anyone have experience w this issue? Looks like the one I have is a good candidate to turn into a front then…
 
From my understanding the ones w press on style drums like mine have a shorter spindle or shorter spacing in the spindle between the flange and where the hub sits not leaving enough room for the rotor to fit? I’m not sure tho hoping sumone else knows exactly
 
TurboYJ said:
From my understanding the ones w press on style drums like mine have a shorter spindle or shorter spacing in the spindle between the flange and we’re the hub sits bit leaving a ouch room for the rotor to fit? I’m not sure tho hoping sumone else knows exactly
Click to expand...
If that's the case could you just run a slip on rotor and a weld on caliper bracket?
 
I beleive the issue is there isn’t enough room for the rotor to fit between the hub and the flange, it will slide right on but then the hub won’t seat in fully. I’m assuming the spindle is shorter in the older ones but I don’t know. As I don’t yet have the other in my hands yet. Could try to find a skinnier rotor from a diff vehicle too but I was hoping sumone out there might no already. I haven’t been able to find an answer anything other than they don’t fit on the earlier axles w the slip on drum.
 
06h3 said:
Ruffstuff is not what they used to be.

I doubt I will get far with them. Last time I talked HO72 talk with them I was told they are not fans and they are irritated they made HO72 diff covers and nobody bought them.

I told them that’s because people begged for years. They never made them, everyone went out and bought diff covers off a guy on eBay or built their own. They were late to the game.

This wasn’t from Dan but not a regular sales guy either. He was a manager of some sort.
Click to expand...
If they did it once, it should be easy to do again. Call until you find someone who will make it happen. :smokin:
 
Hey guys, not a 4x4 guy here but I do use these rears in the demolition derby world. For a couple of reasons actually.

Low ground clearance
Natural deep gear ratio
and most of all an all steel housing to weld suspension brackets on especially for a 4 link car suspension.
The one 4.57 is a factory detroit and works well
The second one is a 5.14 that i put a 14b mjni spool in. Here are my questions

Did dude who went to 14b shafts to compare against the factory 17 spline continue to break shafts?

Is there an alternative larger shaft a guy can use with a mini or full spool without changing spindles?

Can a 14b full spool be modified to fit an eaton?

Thanks
 
Demoman said:
Hey guys, not a 4x4 guy here but I do use these rears in the demolition derby world. For a couple of reasons actually.

Low ground clearance
Natural deep gear ratio
and most of all an all steel housing to weld suspension brackets on especially for a 4 link car suspension.
The one 4.57 is a factory detroit and works well
The second one is a 5.14 that i put a 14b mjni spool in. Here are my questions

Did dude who went to 14b shafts to compare against the factory 17 spline continue to break shafts?

Is there an alternative larger shaft a guy can use with a mini or full spool without changing spindles?

Can a 14b full spool be modified to fit an eaton?

Thanks
Click to expand...
I ran the Eaton shafts and now 14b shafts. Still haven’t broken one but it usually took a year or two. So I’d say still in process.

A 14b mini spool can be used in an eaton. A regular spool I would imagine could but needs
modification like a 14b arb
 
06h3 said:
I ran the Eaton shafts and now 14b shafts. Still haven’t broken one but it usually took a year or two. So I’d say still in process.

A 14b mini spool can be used in an eaton. A regular spool I would imagine could but needs
modification like a 14b arb
Click to expand...
Any idea on the modifications to the spool? I imagine just different ring gear pattern, what about spacer for the gear?
 
Demoman said:
Any idea on the modifications to the spool? I imagine just different ring gear pattern, what about spacer for the gear?
Click to expand...
Yes on the ring gear pattern, I don’t think they did any spacer modifications on the arb
 
Demoman said:
Hey guys, not a 4x4 guy here but I do use these rears in the demolition derby world. For a couple of reasons actually.

Low ground clearance
Natural deep gear ratio
and most of all an all steel housing to weld suspension brackets on especially for a 4 link car suspension.
The one 4.57 is a factory detroit and works well
The second one is a 5.14 that i put a 14b mjni spool in. Here are my questions

Did dude who went to 14b shafts to compare against the factory 17 spline continue to break shafts?

Is there an alternative larger shaft a guy can use with a mini or full spool without changing spindles?

Can a 14b full spool be modified to fit an eaton?

Thanks
Click to expand...

I know derby cars are a different world, but are guys breaking Eaton and 14b shafts?
 
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