Transfer case extension housing replacement

[BentGear]

I am replacing the transfer case housing extention and it appears rtv gasket material may have been between them from the outside but the surfaces look really clean. Do I need to put rtv between them or cut a gasket or something else? 

[scaleless]

Gray RTV, or any RTV that says it is rated for gear oil.

[zomeizter]

Use a gasket if you can get one at the local parts house. RTV is acceptable, what you saw on the mating surfaces is due to the "squeeze out" of the RTV upon tightening, that is no issue though as long as no leaks exist.

[scaleless]

3 minutes ago, zomeizter said:

that is no issue though as long as no leaks exist

To a point.  If you use way to much RTV, there will be free chunks that get detached on the inside and they'll be floating around in the case!

[zomeizter]

Just now, scaleless said:

To a point.  If you use way to much RTV, there will be free chunks that get detached on the inside and they'll be floating around in the case!

no one could possibly dab more RTV than required! LOL

[BentGear]

Thanks for the feedback. I went with the gray rtv.  It is setting up now. If it leaks I'll switch to a gasket. The hardest part of this task was the oil seal, getting that seal in was ridiculously hard.

[mjeff87]

14 hours ago, zomeizter said:

no one could possibly dab more RTV than required! LOL

 

You should have seen the diff cover on the 8.25 in my KJ.  It had never been opened up by me or the PO (it had that OEM orange colored sealant from the assembly line).  When I was able to *finally* pry it loose and get it off, I almost had a heart attack.  The amount of RTV inside the cover was laughable, and I don't know how much actually fell off and got ground up in the r&p.  I'm not sure who actually did it, the axle manufacturer or Chrysler.

[zomeizter]

20 hours ago, mjeff87 said:

 

You should have seen the diff cover on the 8.25 in my KJ.  It had never been opened up by me or the PO (it had that OEM orange colored sealant from the assembly line).  When I was able to *finally* pry it loose and get it off, I almost had a heart attack.  The amount of RTV inside the cover was laughable, and I don't know how much actually fell off and got ground up in the r&p.  I'm not sure who actually did it, the axle manufacturer or Chrysler.

Yeah dude, seen a fair share of "more is better" engineering...