Which side?

Black side

Green side

 

Look closely at your first photo: the word "OUTSIDE" is molded into the rubber.

 

Thanks Steve. I should have put my reading glasses on.

 

You can use your phone's camera for that, too.

 

Took the extension housing off. Got the bushing out. Waiting for the part to come in the mail. I got the bushing out using this.

A couple of brackets i put together and rounded off the edges to fit. Used an 8 pound sledge. Worked perfectly. No damage to the housing at all.

 

Update. Got the bushing. Hammered it in with a 2×4 then used my tool I made to pound it flush. Then put the seal in and put a new gasket on the extension house. Put the drive shaft back on using the Markings I painted to make sure it all lined up. I bolted it back together at the differential. Earlier I put the new pinion seal and tightened down the pinion nut until the measurement of the threads back to where I measured before I took it off. I then lined up the Markings on the nut and the differential. Filled the differential with gear oil and filled the transfer case with tranny fluid. Took it for a test drive, no leaks, no vibrations. Once again thank you guys for your help. God bless.