I have the D-80 on my dually and need to know what size socket to use to get the seal out. I hate it when my rear leaks, but I guess it could be worst if my front was leaking.

From what I understand it is I only have to change the seal?

 

IIRC it is a 1 7/8" 6 point. The outside wall may have to be ground down to fit inside though.

 

Thanks Jim. Man, it's bigger then I thought.

 

Your welcome Rick. It is a good sized one. Do you need the torque specs? I can try and look them up for you.

 

That would be great Jim. I was told to crank down on it pretty hard to make sure things line up right.

 

Here you go Rick:

Torque Specifications
Description Nm lb-ft
Pinion shaft lock nut 637 470
Driveshaft bolts 136 100
Differential bearing cap bolts 108 80
Ring gear bolts — grade 9 298 220
Oil filler plug — 1/4-inch recess drive 34 25
Differential housing cover bolts (F350) 47 35
Differential housing cover bolts (F450-F550) 61 45
Sensor (ABS) bolt 40 30

 

When we talked about this a couple of weeks ago, I wasn't sure. I hadn't removed one on a Dana 80. The last ones, I tackled, were the Sterling 10.25 & 10.5 differentials. Jim is definitely right on the size. Snap 0n even sells a special socket for them: http://image.snapon.com/international/pdf/M3586.pdf
You'll need a 'big tool' to get the job done.

 

Thanks Jim and Roland. That is a big tool, I know my tool is not that big. . Guess I will ask some of the farmers around here to see if they have that size socket I can use. Bet that socket cost major bucks. I know anything with the word SPECIAL with it will cost.

 

Wow, Jim, 470 ft-lb. Looks like I will have to get my fat neighbor to come and sit on the cheater pipe to get that much on the nut. Maybe I should have said BIG PERSON.

 

I did a little more research on it last night. Some guys buy a crartsman socket and turn the edge down in a lathe.

 

Darn Jim. I have a grinder, no lathe. Seems like ford would had made it where a regular socket would fit.

 

A manufacturer make it easy?? I guess you'll have to do some precision grinding!

 

I'd recommend borrowing a torque wrench to properly torque down the pinion nut vs. just using a cheater pipe or a big impact.

 

I agree with this. I have customers that own large equip. companys. So I hope I can find something big enough. I try to torque what I can.

 

you can also use a torque multiplier,makes life a little easier