[skobydog]

I have a compact front end loader built in 1986. The reason I am posting here is because when I do a search on differentials I keep coming across this site. You guys here seem very knowledgeable about rear differentials so I hope someone can help.

The repair manual says the machine uses a Dana 70 front and rear (limited slip 4 wheel drive). The first number I got off the axle was c34835. I was able to read the tag that was bolted to the dif cover had the numbers 43.6 7.17 which I believe are the tooth count and gear ratio.


I've also come across the numbers 85 248. When I search the 248 people are saying 248 is the measurement of the ring gear in millimeters. 248 mm=9.75 inches. Which people are saying is the diameter of a Dana 60 ring gear. Dif main cap bearings have the numbers 0257 which probably means nothing but thought I would include.



I cannot see a BOM number anywhere on the axle.



Any thoughts on the extent of the damage done outside the sheared bolts (there are obvious metal pieces found that were not bolts).

Will a shop be able to identify the parts needed for this differential given the information provided by looking at this?

The only other thing I can do is spin the rear tires if that would help with any identification or damage done. Would doing this help with assessing damage?

Any other research I should do before calling a shop?


I have pictures but the forum site will not let me upload until I have more posts.

Thanks for any help.

 

[total newb]

Absolutley they will.

Bom# tend not to exist on specialty axles like van fronts, off hiway equip, and forklifts.

There are quite a few possible internal and beari,g sets that will fit it, put it infront of a diff mech and they will be able to get it handled

 

[Beat95YJ]

What is broken?

 

[skobydog]

Bolts sheared are the ones that attach the case or sometimes referred to carrier...it connects to the ring gear (limited knowledge here). Metal pieces also found inside which are not bolts.

Also found these numbers on the ring gear (1985 dana d 39159)

Searched "Dana 39159" came up with this:

706061-10X 7.17 (43 - 06) 70741-1X 39158 39159 706999-15X Industrial off highway: Model 70HD (with 34848 Differential Bearing Spacer, included in 706061X kit)


Listed as "Industrial Off Highway" (vehicle is a front end loader/backhoe)
7.17 (43 - 06) matches the tag that was bolted to the diff.

 

[skobydog]

I can't post pics.........says I don't have enough posts yet.

 

[Dr.Danger]

So you're saying the bolts that hold the ring gear to the carrier are sheared off?

You're not giving us much for details. Look up a diagram of the parts, and tell us exactly what is going on.

 

[skobydog]

The kit 706061-10X is showing the 70HD using pinion number 39158 which is .625 Offset Pinion so I guess I'm getting closer.

So this is what i have so far and I think it's right.

Dana 70 limited slip
Number off the axle c34835
Tooth Count 43.6
Ratio 7.17

Dana #39159 (stamped on existing ring gear). Searched #39159 and came up with kit 706061-10X

Kit shows
70HD
9159 Ring Gear
39158 Pinion (0.62 offset)

Any info besides the following needed?
Dana 70 limited slip
70HD
9159 Ring Gear
39158 Pinion (0.62 offset)
Tooth Count 43.6
Ratio 7.17

 

[Beat95YJ]

Look at a schematic so you know what to ask for. Ring gear bolts I think.

 

[skobydog]

So you're saying the bolts that hold the ring gear to the carrier are sheared off?

You're not giving us much for details. Look up a diagram of the parts, and tell us exactly what is going on.

The bolts run horizontal through the carrier and I think they are supposed to attach to the ring. I've tried looking them up but the only carrier bolts I see are short. These are appr 4 inches long.

 

[skobydog]

Finally

 

[skobydog]

Metal pieces inside

 

[bgaidan]

Appears to be a broken dickfer. Gonna be hard to find a replacement.

 

[skobydog]

Appears to be a broken dickfer. Gonna be hard to find a replacement.

Can you elaborate? Not sure what you mean. Thanks

 

[total newb]

You mean you dont know what a dickfer is?

 

[total newb]

Those are the case half bolts

That is a powerlock posi diff

They are blatantly obviously the tips of the ring gear teeth that are broken in the pic.

Possibly a spider gear tooth too.


Dont let the tires touch stupid.

 

[skobydog]

I believe the spider gears are toast also with all the metal inside.

I see these 70HD Power-Lok cases were used in older one ton and heavier trucks.

Can a case be pulled from these or do the spider gears come in different gear ratios? If the spider gears are all the same in 70HD what other information would I need to pull one from an old truck and be able to use it? Do i have any other options? Thanks

 

[Subybaja]

Spider gear ratios...ummm. Spider gears do the "differentiating" to let the axle go around corners. Limited slip will just have some friction plates under the spiders inside the carrier to limit that power transfer and make both sides go.

You can get a used carrier from a different axle. Since your R&P are toast, you (or a tech) will need to set up new gear clearances. It's not just drop-in. You can reuse gears, but it's not really worthwhile, especially if you're paying to have them done.

If DIY:
http://www.pirate4x4.com/forum/gene...antz-engineering-advanced-masters-course.html

 

[Dr.Danger]

If you have to ask what the part names are for the pieces inside a differential, you have zero business attempting to put a new carrier in and setting up gears in one.

I'm not being an ass, I'm dead serious. This is where you pay someone to put it back together. It requires some tools you probably don't have and more skill than the novice mechanic has.

 

[CDA 455]

I totally concur here.


Diffs are way too important to mess with.

 

[total newb]

The spiders are specific to the axle spline and power lock type diff. Regular open diff spiders will not work.

You can take a hd open diff and install that, but it has to be a 4.56-7.17 carrier and "hd".