Eaton HO72/HO52 vs. 14 Bolt FF

[Getter-Done]

Has anyone swapped a H072 from a 1965 C-30 to a 1967 C-30 Cab and Chassis?

[abig84]

Originally Posted by Getter-Done

Has anyone swapped a H072 from a 1965 C-30 to a 1967 C-30 Cab and Chassis?

I would think they would be pretty close in width, I kicked out the ho72 from under my 52 for a 80s 14 bolt. Have to move perches and shock mounts, u-joints look different too but haven't got that far

[Getter-Done]

Originally Posted by abig84

I would think they would be pretty close in width, I kicked out the ho72 from under my 52 for a 80s 14 bolt. Have to move perches and shock mounts, u-joints look different too but haven't got that far

Thanks for the info.
I have a 14 bolt waiting in the wing.
It is funny how this stuff happens.
I was walking thru the pick a part and this one jumped out in front of me.
I will probably just get the pumpkin out of it.
The whole thing may follow me home

[Captainfab]

I would think it should be a direct swap. Personally I would go with either a 14 bolt or a Dana 60 or 70 before I would bother with a Eaton HO52/72.

Originally Posted by Getter-Done

Has anyone swapped a H072 from a 1965 C-30 to a 1967 C-30 Cab and Chassis?

[Getter-Done]

Just got a measurement on both.
It’s 47” plate to plate on my 67 and 46” on the other.

[Captainfab]

That is not an accurate to measure a differential's width. You must measure WMS to WMS (Wheel mounting surface). That is the dimension that matters. Not all brakes are the same width and not all backing plates are the same.

Originally Posted by Getter-Done

Just got a measurement on both.
It’s 47” plate to plate on my 67 and 46” on the other.

[Getter-Done]

Originally Posted by Captainfab

That is not an accurate to measure a differential's width. You must measure WMS to WMS (Wheel mounting surface). That is the dimension that matters. Not all brakes are the same width and not all backing plates are the same.

Thanks
After Re measuring the backing plates they are the same.
Yes I need to pull the wheels off mine to get a good measure.
I think I will just get the pumpkin out and let the rest go.
Thanks for your help.

[Getter-Done]

Originally Posted by Getter-Done

Has anyone swapped a H072 from a 1965 C-30 to a 1967 C-30 Cab and Chassis?

Thanks CaptinFab and abig84 for the info.
I came home with just the chunk.

Here is my Numbers I have to share maybe some helpful info someone could use later.
The H072 rear axle I pulled the chuck from today was a 36/8 tooth (4.5 ratio).
It is anybody's guess if it was original.

The vin tag was Gone so No id but(from what I had to go by) it was 64-66 Chevy C-30 with 6 cyl. and sm465 with parking brake on the rear of the trans.
The main info I found out is that the axle housing would be a direct swap to my 67 cab and chassis C-30.
The measurement to the center of each spring perch is 40".
Both trucks have 2 1/2" wide springs.

From the same Pick a part 6 months ago.
There was a 71 GMC 2wd V8 Fleet-side truck (Flint plant).
I pulled the chunk from it was 32/8 tooth (4.0 ratio). this is the one I will use in my truck.

I also bought the doors from this truck. It still had the Blue I.D. sticker on the door.
In the 5th spot was an O or 0. I looked at the Vin decoder that bruceman1968 has on this site.



This makes me think that the O was maybe for that 4:11 ratio rear chuck.
Hope this info helps someone.