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Discussion Starter · #1 · (Edited)
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.
 

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Discussion Starter · #4 · (Edited)
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.
 

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Discussion Starter · #7 ·
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
 

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Discussion Starter · #9 ·
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.
 

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Discussion Starter · #16 · (Edited)
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
 

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Discussion Starter · #21 · (Edited)
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.
I was asking because I know someone that has a 70HD for sale. Obviously I'll need to do more research but I wasn't planning on doing this myself. I'm just trying to determine if it's worth buying. :)
 
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