8.75 axle flange — damage or casting flaw?

[Righty Tighty]

I pulled my axles today to replace the seals, and on the driver side I noticed this “rift” for lack of better terms. It’s a split, and to me it looks like a casting flaw. First question is, do you guys agree that it’s been there from the beginning, and that it’s from the casting process? Second question, should I be concerned? I really don’t want to have to replace the flange….but I’ll do what I need to do.

 

[Dana67Dart]

Manufacturing flaw.

I have a housing with a similar flaw on the outside
It could be welded up and machined if it bothers you.

Cass at Dr diff said manufacturing flaw. Nothing to worry about.

 

[MoparMike1974]

I agree, as long as your race still fits tight I wouldnt worry about it.

 

[Righty Tighty]

Thanks guys. That's really what it looked like to me when I saw it, just wanted some expert opinions.

 

[Righty Tighty]

Another question, this one regarding replacing the axle seals, I didn't think silicone was typically used, but you can see that whoever did these the last time used quite a bit. Do I need RTV when I replace the seals?

 

[Dana67Dart]

Many people put a thin film around the outside of the seal before putting it in.

Technically it should not be needed but 50+ years can take it's tole on things.

 

[MoparMike1974]

You shouldnt need anything to seal the outside of the seal to the housing. It might be necessary if the housing is pitted. Otherwise, I just put a thin coat of grease on them to make it easier to push in.