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Old 12-15-2009, 02:07 PM   #1 (permalink)
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Buildin' a Dana 70 Front: Need some help

I'm building a front axle out of a Dana 70 that was a CJ10-A rear axle.

I'm building a CJ10 and I traded some stuff for another CJ10-A rear.
-link to my build thread:
https://www.pirate4x4.com/forum/showthread.php?t=730949

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It already has 4.88s and a powerlok and it matches the rear axle. So I thought it would be cheaper and stronger than finding a 60 and gearing it out to match.
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I came across a dana 60 without a carrier and hubs for a few hundred.
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I had a friend machine the tubes of the 60 c's to fit snugly in the 70s tubes.


As I'm getting ready to put it back together. I need help on the exact length I need the 70's tubes.

Here are some pics of approximately how far the short side shaft will fit into the carrier.




Is this good or should I shorten it tube more?

I'm not gonna weld it up today. So I'm in no rush. I just want to get it right before I do.
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Old 12-15-2009, 03:25 PM   #2 (permalink)
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what was the length from the inner C to carrier race on the chevy axle? Thats the length your 70 should be. I hope you measured before you cut.
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Old 12-15-2009, 04:03 PM   #3 (permalink)
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It's actually a Dodge 60.

I measured. I just wasn't sure if the different chunks would throw it off.
But I went and checked with width from one carrier bearing cap to the other in the 60 and they are the same as the 70.

It actually puts me right on the money.
......

The problem I now run into is if I use the jeeps 32" center pin to center pin setup. I'll have to do some crazy machining on the chunk to run to bolts on one side of the spring.

I plan to 3 link the front one day, but it's definitely not in the budget anytime soon, and I wanna go wheelin'.

Other options would be to either redo the jeeps spring hangers and widen 'em to like a 36" center pin width.

-or-

Have a custom inner shaft made for the long side and shorten it several inches. Which would give me a 64" or so WMS to WMS.

That wouldn't be a big deal because I'm already planning to narrow the rear and use the yukon cut to length 35 spline shafts.

This option would mainly just cost more. It would be inconvenient that I couldn't use a stock premade shaft as a replacement, but I don't see me breakin' and inner shaft with the stock SD33 N/A diesel and 42" SX's.

But there might be one day in the future when I throw a more power engine in there.

Ideas?
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Old 12-15-2009, 06:18 PM   #4 (permalink)
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Cool build.

Is that weld on the carrier of the power lock, near the cross pin? If so why did you need to build it up? If not dieregard

Jason.
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Old 12-15-2009, 06:29 PM   #5 (permalink)
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Just curious, but why don't you figure out the axle width you need (wms-wms) and then get some custom axles built? Or is this budget build?
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Old 12-15-2009, 06:35 PM   #6 (permalink)
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Whats the plan for axle seals?
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Old 12-15-2009, 06:42 PM   #7 (permalink)
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dodge uses the same long side but a 15.96" short side compared to a chevy which uses a 17.67" short side. dodges are roughly 67" wms where chevy is 69" wms. You could also run 78-79 for shafts which are 18.6? and 34.56". Best bet since you have it is run the long side dodge axle (only a little bit longer than the 78-79 ford long side) and use the 78-79 short side inner. Should give you plenty of room.
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Old 12-15-2009, 06:47 PM   #8 (permalink)
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Is that weld on the carrier of the power lock, near the cross pin? If so why did you need to build it up? If not dieregard.
Nope no weld.
.......
I was gonna go with the seals it axle seals. Like the 14 bolt front Xtreme built. Or I could machine some "pucks" out of some left over 60 tubes for axle seals and have them be a really tight hammer fit to go inside the the 70 tubes in the carrier.
.........

I was laid off from my day job 6 weeks ago. Before all the money I made from my audio/parts business was for building toys and funding all the travel expenses and junk that went along with wheelin'. Not dippin' into "our money" kept the wife really happy.

Now it goes to payin' bills.

So, I'm tryin' to build a capable crawler for not too much. I could have gone with dana 44s, leafs all around, no doubler, and 36" HMMWV tires...but if you look at the build thread, I'm skippin' the baby stage.

Oh, and I'm building my mud truck at the same time.

As I said, I'll have a custom inner shaft made for the long side it that's what I decide is my best option.
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Old 12-15-2009, 06:54 PM   #9 (permalink)
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dodge uses the same long side but a 15.96" short side compared to a chevy which uses a 17.67" short side. dodges are roughly 67" wms where chevy is 69" wms. You could also run 78-79 for shafts which are 18.6? and 34.56". Best bet since you have it is run the long side dodge axle (only a little bit longer than the 78-79 ford long side) and use the 78-79 short side inner. Should give you plenty of room.
Only problem with that option is that I already cut the short side of the 70 tube. And the tube coming off the 60 c isn't really long enough for me to feel comfortable sliding out of the 70 enough to account for the longer shaft.

I'm actually having to extend the 70's tube on the long side by throwing a 2" piece that I cut off what became the short side, but the tube on that c is longer. We couldn't have it longer on the short side cuz that's all that was stickin' out of the 60 on the short side.
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Old 12-15-2009, 08:21 PM   #10 (permalink)
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This may sound dumb, but because it was originally a rear axle, wouldnt you need to flip it upside down for the wheels to turn the correct way, or am i way fucking off?
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Old 12-15-2009, 08:24 PM   #11 (permalink)
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or am i way fucking off?
Go with this.
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Old 12-15-2009, 08:29 PM   #12 (permalink)
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No, you don't need to turn flip it. Only if you were running a rear engine setup.
.......

The cool thing is the 70's chunk is nodular iron, so I can weld on it.

I could possibly have a perch machined and then I can cut a wedge out of a chunk and weld in the perch or something.

I just don't want to have to make a perch that's gonna make the spring sit 2" higher. I'm trying not to end up crazy high.
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Old 12-15-2009, 08:30 PM   #13 (permalink)
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Go with this.
Thanks.
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Old 12-15-2009, 08:38 PM   #14 (permalink)
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If i remember when i get home i'll measure my dodge dana 70 front but here is a pick of the short side when were narrowing it. We never cut the short side, just the long side.

A before pic

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Old 12-15-2009, 08:44 PM   #15 (permalink)
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If you look up in my first post, my short side looks way shorter than that axle.

I found the measurements I took.
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Old 12-15-2009, 09:18 PM   #16 (permalink)
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Here's what I'm talkin' about. Kinda like the stock chunk was. I'll have to see if my friend has the capacity to machine it like that.

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Old 12-15-2009, 09:55 PM   #17 (permalink)
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Here's what I'm talkin' about. Kinda like the stock chunk was. I'll have to see if my friend has the capacity to machine it like that.

aas long as you have 1inch or more of spline engagement is ideal, I wouldnt machine that chunk like a stock d60f gm, Id run long perches, cutting enough of the perch to still be strong, and then match it to the pumpkin so you can use ubolts, the longer perch just has to be slightly longer than the cast of the pumkin to catch on the ubolts.
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Old 12-15-2009, 10:07 PM   #18 (permalink)
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The problem I now run into is if I use the jeeps 32" center pin to center pin setup. I'll have to do some crazy machining on the chunk to run to bolts on one side of the spring.

I plan to 3 link the front one day, but it's definitely not in the budget anytime soon, and I wanna go wheelin'.
First: Don't cut your diff housing up.

I'd suggest running this axle shaft in the long side: 660182-26
That will get you near 65" WMS, then just run the axle off set until you can get your 3-link.

Don't like that idea, then outboard your springs.
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Old 12-16-2009, 09:48 AM   #19 (permalink)
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I'd suggest running this axle shaft in the long side: 660182-26
That will get you near 65" WMS, then just run the axle off set until you can get your 3-link.
This is a great idea. I think the stock long side inner is 35.1" or so.

I need to measure and see where that would put my center pins on the axle housing. It'll definitely be better.

I actually like the idea of it being narrower without having to go to a custom shaft. I plan to run H1s with pressed centers. So I believe I'll be at 3.5" backspacing or so.

The rear axle can be whatever I want it to be since I was planning to narrow it anyway. I'm gonna make it where I can have equal length shafts on each side so I can have carry one spare(though I doubt I'll need it with the stock engine).
.......
Where the best place to get the 32" inner?
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Old 12-16-2009, 12:00 PM   #20 (permalink)
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The 32" shaft would work perfect, but it looks like you can't get one off the shelf anywhere any more.

Anybody have an idea?
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Old 12-16-2009, 06:03 PM   #21 (permalink)
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Anybody have a source on the 32" spicer shaft?

If I can't find that I'm just gonna move the hangers out an inch on each side, and that'll solve my problem.
It's not that hard on a CJ10 since the shackle has it own hanger that I can just move over and box and brace it.
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Old 12-16-2009, 06:50 PM   #22 (permalink)
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Anybody have a source on the 32" spicer shaft?

If I can't find that I'm just gonna move the hangers out an inch on each side, and that'll solve my problem.
It's not that hard on a CJ10 since the shackle has it own hanger that I can just move over and box and brace it.

you are right that shaft was long discontinued....

with that said I have at least three leaning against the wall
I used to have several more I acquired back around 1996,probably at least 10. PM me if you are interested. And no they do not neck down. If my memory serves me right without consulting the spicer book, 660182-26 shaft were made for OPEN KNUCKLE KING PIN dana 70 fronts that are made for "off highway equipment."

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Old 12-16-2009, 07:35 PM   #23 (permalink)
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ok, i got the measurement, its 8" from the edge of the housing to the edge of the C. I wasnt thinking about how much narrower your pic showed, my bad.
The axle i posted came out of a front wheel drive dodge bus, so a place that deals with med duty trucks might have some differnt shaft options.
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Old 12-16-2009, 07:52 PM   #24 (permalink)
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Thanks though.
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Old 12-16-2009, 08:12 PM   #25 (permalink)
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Whats the plan for axle seals?
Yea, i what'a see the tube seals?
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