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Old 05-31-2015, 05:35 PM   #1
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help to ID what Rear End this is

Hi Folks

I want to change my differential fluid but not sure what type it is.
The Cover shows its a Dana with the following numbers..
42815 2
0 856
Rev T
05 13 94
It s on a 96 E350 Chassis.

Not sure if its Dana 60, 70 or 80?
More importunity.. What is the proper fluid to put in unit. Do I need any special friction modifiers?.
See attached photos from rear end.

Thank You
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Old 05-31-2015, 05:41 PM   #2
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I do not see anything indicating that it is limited slip, so a std gear oil should be fine. No special additives required if not limited slip. A synthetic would be good, like 75W-140 or similar, because you will generate some heat with the load.

If you have an overall picture of the housing, especially the cover that can help tell what model it is. May also have a stamp on the axle tube.
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Old 05-31-2015, 06:02 PM   #3
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I believe the VIN will Id the rear end.

Look for a VIN code chart on the net.
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Old 05-31-2015, 10:55 PM   #4
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Tag #605848 1 is a Dana 70HD Standard Diff. 4.10 ratio (#605848 2 would be Power Loc Diff.) Tag # 42812 2 is the part number for the Diff. Cover also for a Dana 70 YOU can google the 605848 1 number and find the Dana/Spicer Axle parts catalog and using this number tells you all the parts in the axle. the shop manual for this if you ever want to change a seal can be found at: http://spicerparts.com/sites/default...ary/5312-9.pdf
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Old 05-31-2015, 11:09 PM   #5
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Thanks All

Pathfinder.
Thanks for the link to the service manual. Recommended is a 80W-90. You say I have a Power Lock diff. Does that mean I need to add the Friction Modifier?
Also, I will be doing most my driving in the south west area. Temps can be in the 90-100's when I am climbing some fairly steep grades (5-9% for 5-10 miles ). Should I consider a 80W-140?

Thanks again;
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Old 05-31-2015, 11:54 PM   #6
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Yours was the 605848 1. (1) was STD. Diff. It would have a (2) if it had the Power Loc. No additive needed in yours. I've always used the 80W140. The 80W is the cold spec so they are the same thickness in cold weather. You are gain a higher temp protection with 140.
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Old 06-01-2015, 12:45 PM   #7
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Thanks Pathfinder. I did see you mentioned I have a 605848 1 which is standard and Friction Modifier is not needed. I will use the 80W-140 too.
Also, for others interest, I found the following link has good info on the Dana 70 including links to more resources.

The Dana 70 Bible

Happy Trails!
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