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I can get a rear axle out of a '74 D300 dually. Assuming that it is a 35 spline Dana 70, will the axle shafts fit a '78 SRW Dana 60 rear with 30 spline shafts?

And yes, I am aware that the spindles will need to be bored larger and the differential side gears must be changed out. But is the axle flange and shaft length the same?
 

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I think the dually axle housings are wider than the single wheels. I have been wondering about motor home 70s, they are narrower track than the pickup dually rears. I picked up 2 recently cheap just to have around for parts.
 

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txs said:
I think the dually axle housings are wider than the single wheels. I have been wondering about motor home 70s, they are narrower track than the pickup dually rears. I picked up 2 recently cheap just to have around for parts.
I have a motorhome D70 in the rear of mine(99% sure it is) and it is the same width as my Chevy 60 front. Mine is 1.5" 35 spline also. Never actually measured the width though. ???
 

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Makes sense, I was just hoping the shafts were the same length.
 

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The stock dana 60 shafts should be 34 1/4 inches to the inside edge of the flange. I have pulled a ton of 70 shafts out of duallys all were at least 1/2 inch long. The flange is the same. 74 may still be 23 1.5 spline also. If you have the correct dana 60hd housing everything will slide right in. The 60hd has the spindles already bored. I have a 35 spline powerloc, I built using a 16 spline dana 60 powerloc and internal parts(35 spline) from a 70 powerloc. I just need the axle shafts.

If you find some that are the correct length, let me know. Thanks Mike
 

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1/2" isn't much. If there were enough extra spline on the shaft, you could cut the 1/2" off and run them.
 

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True, but I think I can find the correct ones. I suspect the 89-93 cummins srw 250 trucks used 34 1/4 inch 35 spline shafts. I was going to confirm this by purchasing a 90 dana 70 3.54 posi. However this deal did not come through. I have not been looking too hard lately. Guess I should go and pull some axle shafts. If I find anything that works, I will report back.
 

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trailduster440 said:
True, but I think I can find the correct ones. I suspect the 89-93 cummins srw 250 trucks used 34 1/4 inch 35 spline shafts. I was going to confirm this by purchasing a 90 dana 70 3.54 posi. However this deal did not come through. I have not been looking too hard lately. Guess I should go and pull some axle shafts. If I find anything that works, I will report back.
`92&`93 250's have an oddball 1.41" or something, 32 spline D70.
 

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If you have a good 4x4 wrecker near you, there is a Ford 35 spline axle that is only longer by 3/16". I used these ones when I switched my 60 to 35 spline.
 

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Which Ford application? There are several 70's fords around in local yards. In fact there are two with dana 70s and srw. I have not pulled the shafts yet. I suspected that ford used them in some dana 70s. I called a local full-service yard awhile back and they had some that were very close and they are ford specialist. I know the sterling rear I pulled a shaft on would not work do to the design of the seal. Thanks
 

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I would guess pre `80, that is when they went to the 10.25 Sterling rear wasn't it?
 
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