Dana 70HD...

[dakotajeep]

Well, I swapped out my 10.25 with 4.10's for a Dana 70HD with 3.55's. Its super rusty and I need to take the drums off but they are frozen on the hub. Might have to get a puller. Who knew that these ad reverse threads on them? Took me about 5 minutes of pulling, twisting and staring at the stud to realize its reverse threaded....not cool.

Any suggestions of what things I should do to prep for installation?

What size U bolts do I need?

thanks

Thad

 

[bghnkinf350]

If it still has reverse threads, likely early to mid 80's. The whole hub comes off and the drum attached to the back of the hub.

 

[dakotajeep]

I already almost beat the crap out of it. Guess I should have asked first. Now I know.

I also need new brake lines on the axle. Both of them are rusted on the axle I got. Any suggestions? Is there any difference between them and the sterling?

What should I do since there is no speed sensor?

Thad

 

[bghnkinf350]

Big advantage of the later axles..... No need to remove axle shafts and hubs to get to the drums! With that in mind, I have heard the hubs and brake set up can be changed between the two so wou could get the brakes off the sterling. I do not know if it will actually work.

Now would also be a good time to get rid of the LH threaded studs.

 

[IDIDieselJohn]

1987 Dana70 16U with slide off drums

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[dakotajeep]

What were the gear options on the 70HD? I was told this one has 3.55's but I just am curious.

The only things I can read on the tag are 41A ANO on the top left and -5 LS on the bottom left. Maybe that helps?

Thad

 

[IDIDieselJohn]

Technically Dana gears are 3.54 and 4.11 for the D70.

Ford gears are 3.55 and 4.10, silly yes but that's what it is.

 

[dakotajeep]

Thats what I figured. I am curious if it actually is a LS.

Thad

 

[bghnkinf350]

You can check the bill of material on the Dana website, of course the gears could have also been changed at some time.

 

[Diesel_brad]

Usually the head of one of the bolts covers the part of the gear ratio.
Like if it was a 3:55 Limited slip you would see the bolt head then L55. The bolt would be covering the 3

As for swapping the outers of a sterling onto a D70. Its not gonna happen. different bearings.

And like other have said, you need to remove the axle shaft(8 bolts), the wheel bearing nut(possibly a locking mechanism), inner wheel bearing, then the drum and hub assem