Dana 70 questions

[Davadactyl]

First off, I've been doing some research, and I even tried putting numbers in the dana website that's linked here: https://www.pirate4x4.com/forum/chevy...70-thread.html

anyhow, I obtained a 70 that I would like to put 5.86 gears into, and from what I read on the link above, I think it may be a 70-3HD based on those being later models, and the ABS stuff it has. According to that thread the main difference as far as I'm concerned was a different offset. It wasn't too specific, but below I will explain why I think another carrier I have will work.




here are the two carriers. The one on the right is 35 spline, and I don't know which style of 70 it's from, but what I can see is that without the ABS ring that the one on the left has, the ring gear is thicker. as far as I can tell, that's the only difference. Does anyone see any reason I can't run regular 70 gears with the 35 spline carrier in this housing? both carriers seem to drop into the housing the same.



this is the gearset I have in mind, and I would like to verify that it will work with my 35 spline carrier with my housing (the one on the right)

https://www.summitracing.com/parts/m...-586/overview/


If this is a stupid question, then I suck at using the internet. Hopefully that isn't the case.

[mj]

post the bom

[Davadactyl]

Originally Posted by mj

post the bom

only problem is that it's very difficult to read. I just cleaned it up a bit, and it's still real bad



from what I've researched, that should be the number

[mj]

you are looking for a 6 digit number, possibly beginning with 60, may have a suffix - ?

603285-1 Standard 4.10 706048-2X 706081X 706083X 706085X 35091-1 35091-1
603285-2 Standard 4.10 706048-2X 706081X 706083X 706085X 35091-1 35091-1
603285-3 Standard 4.56 706048-3X 706082X 706084X 706085X 35091-1 35091-1
603285-4 Standard 4.56 706048-3X 706082X 706084X 706085X 35091-1 35091-1
603285-5 Powr-Lok 4.56 706048-3X 706050X 706054X 706057X 35091-1 35091-1
603285-6 Powr-Lok 4.56 706048-3X 706050X 706054X 706057X 35091-1 35091-1
603285-7 Standard 4.88 706048-4X 706082X 706084X 706085X 35091-1 35091-1
603285-8 Powr-Lok 4.88 706048-4X 706050X 706054X 706057X 35091-1 35091-1
603285-9 Standard 5.86 706048-6X 706082X 706084X 706085X 35091-1 35091-1
603285-10 Powr-Lok 5.86 706048-6X 706050X 706054X 706057X 35091-1 35091-1
603285-12 Standard 4.10 706048-2X 706081X 706083X 706085X 35091-1 35091-1
603285-14 Standard 4.56 706048-3X 706052X 706056X 706058X 35091-1 35091-1
603285-15 Standard 4.88 706048-4X 706052X 706056X 706058X 35091-1 35091-1
603285-16 Standard 8.86 706048-6X 706052X 706056X 706058X 35091-1 35091-1
603285-17 No Spin 4.88 706048-4X — — — 35091-1 35091-1

[mj]

wait. you have the gears you want to try? you will know instantly when you try and set it up if the carrier offset is wrong

[Davadactyl]

Originally Posted by mj

wait. you have the gears you want to try? you will know instantly when you try and set it up if the carrier offset is wrong

not yet, trying to figure all this out before buying the gears that potentially won't work.


also, thank you for those numbers, I will have to further look into those and see if I can figure out one piece of the puzzle.

[Davadactyl]

yea, can't read those numbers to save my life. Oh well, I will figure something out.

[By-Tor]

Lightly run over the BOM numbers with sandpaper or a file. They'll show up much better.

[Davadactyl]

Originally Posted by By-Tor

Lightly run over the BOM numbers with sandpaper or a file. They'll show up much better.

I will give that a whirl, thank you.

[69DieselLover]

If I remember correctly the tone ring is not a "spacer". The ring is lightly pressed on the carrier before the gear is installed, there are some tabs on the ring that the fit in notches in the carrier and the gear keeps it from falling off the carrier. I would guess there is no difference in those gears. You should remove them and check the carriers again for offset.

[Valley Rock]

What is the rear end out of ?

What spline is the carrier out of that rear end ?


and Yes, a 70 carrier will fit in your 70 housing, and yes 70 gears will fit on your 70 carrier .


The question would be, do you gave 35 spline axles (you should if its a 70) and is it the correct break carrier for those gears you want to install .

[Mutt]

70-3HD i've only ever seen under a few select chevy trucks. The center section should have the model cast into one of the ribs.

I played hell getting the right detroit for my dually. Had to stand OE carrier on desk and give measurements to randy's parts guy to get the right locker. They only sent 3 wrong ones to the shop doing the work.

Also looks too smooth to me, more like a 70-U

[DEER TICK]

There are 70s that came with 32 spline. What gears came in the axle?

[Davadactyl]

Originally Posted by Mutt

70-3HD i've only ever seen under a few select chevy trucks. The center section should have the model cast into one of the ribs.

I played hell getting the right detroit for my dually. Had to stand OE carrier on desk and give measurements to randy's parts guy to get the right locker. They only sent 3 wrong ones to the shop doing the work.

Also looks too smooth to me, more like a 70-U

good to know, hopefully that's what it is. I will post pics of the numbers on the center section soon, thank you.

Originally Posted by Valley Rock

What is the rear end out of ?

What spline is the carrier out of that rear end ?


and Yes, a 70 carrier will fit in your 70 housing, and yes 70 gears will fit on your 70 carrier .


The question would be, do you gave 35 spline axles (you should if its a 70) and is it the correct break carrier for those gears you want to install .

I don't know what the axle is out of unfortunately. something dually I think based on the narrow width, long wheel studs and the flat lug nuts it currently has. It came with 32 spline nonsense. the carrier I want to put in is 35 spline.

Originally Posted by DEER TICK

There are 70s that came with 32 spline. What gears came in the axle?

I will get that figured out and get back to this thread. haven't checked that yet.



thanks everyone for all the input!

[u2slow]

What's the wms width? Do the drums slide off, or are they behind the hubs? FWIW, there's aren't many possibilities for a D70 with a speed sensor.

Dodge tends to be narrower (SRW and C&C anyways), and a conventional yoke was used. 1stgens don't have shock mounts on the housing.

Ford E-series ones tend to be wider, offset pumpkin, and a flange instead of a yoke.

[DEER TICK]

Don't know if this helps,but I think I have the same axle in my rig.I had all this figured out about 6 years ago,but can't find where I wrote it down.I think mine was out of 93ish Dodge D250.Anyway, this is the part # of the gears that I am running.Maybe this will help,maybe not. My WMS is 65", came stock with 3.54 gears,and 32 spline axles..

[cperry]

What are the part numbers on the ring gear and pinion. Ring gear number should be stamped onto the outside of the ring gear and the pinion gear part number should be stamped onto the outside of the shaft on the pinion. Not the ones cut into the pinion head. You can't get the bom from the r/p part numbers but we can decode them and give you the offset on the housing.

[another Lance]

Those numbers aren't the bom. The bom should be on the other tube, passenger side to the right of the cover if looking at it from the rear.

[Davadactyl]

Originally Posted by DEER TICK

Don't know if this helps,but I think I have the same axle in my rig.I had all this figured out about 6 years ago,but can't find where I wrote it down.I think mine was out of 93ish Dodge D250.Anyway, this is the part # of the gears that I am running.Maybe this will help,maybe not. My WMS is 65", came stock with 3.54 gears,and 32 spline axles.Attachment 2332489.

my wheel mounting surfaces are about 65" apart, the gears are 3.54, and it is 32 spline. Thank you for that number, hopefully it will help.

Originally Posted by another Lance

Those numbers aren't the bom. The bom should be on the other tube, passenger side to the right of the cover if looking at it from the rear.

Thank you, I will look closer.

Originally Posted by cperry

What are the part numbers on the ring gear and pinion. Ring gear number should be stamped onto the outside of the ring gear and the pinion gear part number should be stamped onto the outside of the shaft on the pinion. Not the ones cut into the pinion head. You can't get the bom from the r/p part numbers but we can decode them and give you the offset on the housing.

I will look that up, thank you.

Originally Posted by u2slow

What's the wms width? Do the drums slide off, or are they behind the hubs? FWIW, there's aren't many possibilities for a D70 with a speed sensor.

Dodge tends to be narrower (SRW and C&C anyways), and a conventional yoke was used. 1stgens don't have shock mounts on the housing.

Ford E-series ones tend to be wider, offset pumpkin, and a flange instead of a yoke.

drums are behind the hubs, the other info is replied to a quote above. Looks to be a 1st gen ram axle from all this info I've been gathering.

[Davadactyl]

Originally Posted by DEER TICK

Don't know if this helps,but I think I have the same axle in my rig.I had all this figured out about 6 years ago,but can't find where I wrote it down.I think mine was out of 93ish Dodge D250.Anyway, this is the part # of the gears that I am running.Maybe this will help,maybe not. My WMS is 65", came stock with 3.54 gears,and 32 spline axles.Attachment 2332489.

looks like it's a 70-U based on your number:

Motive Gear 72162-5X | Buy at JEGS


So I guess the only concern I will have now is if my 35 spline carrier out of... something else will be compatible with a standard 70-u gearset. What did you use for a carrier?

[DEER TICK]

My carrier is stock ,welded.I am really suprised I haven't destroyed these 32 spline axles.I am probably going to put a 35 spline locker and axles in it next year.I don't set up my own gears,so it cuts out the guess work for me. Trevor at WFO is the one who does my axle work.He is very knowledgeable. Maybe give him a call if you can't come up with the answers you need.Im sure he can answer any questions you have

[Valley Rock]

If that thing is a 32 spline, then it's probably a 60 or 70 U .

I never did see anything telling me it was a 70 other than the OP, but I may have missed something .....

[Davadactyl]

Originally Posted by DEER TICK

My carrier is stock ,welded.I am really suprised I haven't destroyed these 32 spline axles.I am probably going to put a 35 spline locker and axles in it next year.I don't set up my own gears,so it cuts out the guess work for me. Trevor at WFO is the one who does my axle work.He is very knowledgeable. Maybe give him a call if you can't come up with the answers you need.Im sure he can answer any questions you have

thank you!

so you still have the abs ring on the carrier?

Originally Posted by Valley Rock

If that thing is a 32 spline, then it's probably a 60 or 70 U .

I never did see anything telling me it was a 70 other than the OP, but I may have missed something .....

it's definitely a 70. the pumpkin is bigger than my front and rear 60's. Probably a U like you say.

[DEER TICK]

Originally Posted by Davadactyl

thank you!

so you still have the abs ring on the carrier?.

Yes.The abs sensor hole is blocked of with a little steal plate.