Permatex Oranage,Blue,Black all work!
I have changed my 95 5sp, rear diff. 5 times, and several other Dodge trucks numerous times. Summertime and wintertime.
I have used the hightemp orange Permatex, the Cool Blue Permatex and the plain old Black Permatex.
I clean with brake cleaner, add a bead to the cover (factory), install imediately. Wait 30 - 50 minutes. Then add oil and drive away. I would guess the waiting could be shorten even more.
Never a leak, simple, fast, and very easy the second time around.
jjw
ND