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very HD d70 HD

I have to point out a couple of things from posts in this thread...

The ring gear in a 70HD is not any bigger in diameter than a non HD 70, they're all 10.54". The pinion stem is thicker on the HD than non HD. The HD uses larger inner pinion and carrier bearings (like a D80).

While I'm not positive, I am pretty sure the 70 used in Dodge trucks is a non HD axle.

Even though the Power Lock is a limited slip diff it can be rebuilt to almost locker status. The difference is the way the clutches & steels are stacked, the sequence can be manipulated to make the characteristics more aggressive or passive with respect to slippage. You might consider pm'ing TARussell, he knows the way to stack it so that it's practically locked all the time. (fyi, TARussell hasn't been online much lately so his response may be a slow).


As for building a front D70, I would consider using this axle in the rear and you "normal" D70HD for a front project. The center section on this motorhome axle looks like it might be wider which could be a problem locating the right spring pad.

I still think you need to drop in those 5.86's and do a disc swap and let 'er rip! (that's what I did :D )
 
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That's a neat thread on Pirate, I hadn't seen it. I wonder how it would work out if you put the pass. spring pad on the tube instead of the center, would the diff be so far off it wouldn't work? Either way it'd be a cool front end.

I've got another HD housing with the ends already cut off, might make a neat project some day. :thinking:
 
Upon further review...

The pinions are the same, I was thinking it was bigger since the inner bearing is much bigger but the pinion shaft is still the same size. Sorry for the sour tech. :doah:
 
The biggest difference between a 70 and a 70HD is the housing itself. There are differences in the carrier because the HD carrier bearings are wider than those found in a standard 70. Because of the extra width of the bearings for the HD the carrier is actually slightly narrower. The pinion bearings are the same as a standard 70 and the inners are larger than those found on a 70U. The 70U inner piinion bearings are the same od as a Dana 60 but the ID is the same as the rest of the 70s. There things should be clear as mud except that there are variations of the 70HD that use different pinion offsets, the most common is the .625".

Gus
 
obijuan said:
thanks! thats what i would love to do with the powerlock, real agressive but still LS.
for the front 70, id probably use one of the rears that come in our trucks.
have you seen this? its just too easy!!


http://www.pirate4x4.com/forum/showthread.php?t=785371
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Is a D70 that much stronger than a D60 that it'd be worth it? :thinking: It is gearhead cool though... and you know, I have a spare 12bolt and some assorted D44 bits, almost enough to make a 12-bolt front :haha:

-- A
 
dremu said:
Is a D70 that much stronger than a D60 that it'd be worth it? :thinking: It is gearhead cool though... and you know, I have a spare 12bolt and some assorted D44 bits, almost enough to make a 12-bolt front :haha:

-- A
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well what are you waiting for! you know how rare those are:haha:
 
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