What size nut on rear companion flange?

[JoelMartin]

I'm trying to change the rear diff seal on an 04. I took the driveshaft off and now am trying to find a socket to fit that big nut in there. 1 3/8 is to small and 1 7/16 is pretty loose. Must be metric but I don't know what it is. I think its either 35 or 36 mm. ??? And where would you find one? tried a couple rental stores but no luck.

 

[dieselpowered]

It's a 36mm 12 point. http://http://buy1.snapon.com/catalog/item.asp?P65=&tool=hand&item_ID=647060&group_ID=676037&store=snapon-store&dir=catalog

 

[JoelMartin]

Confirms what I thought. Appreciate it.

 

[Joseph Donnelly]

You can find some tips in TDR Issue 67, p. 80.

 

[BDaugherty]

It is indeed a 36mm 12 point which is slightly smaller than 1 7/16". If you can't find one locally or borrow one, you might be able to pick up a Lisle 22100 at any or your local parts stores. It comes with a couple tools you might not use unless you work on Duramax engines. Another option is to just buy one:



http://www.amazon.com/Sunex-236zm-2...41980126&sr=1-1&keywords=36mm+12+point+socket



or the 3/4" drive version:



http://www.amazon.com/Sunex-436mzt-...1980126&sr=1-16&keywords=36mm+12+point+socket