Trans lube fill question

[Ben Swann]

Q-heads!

 

After finding the jammed slave cylinder that caused me to pull the trans out
again, I decided to give the trans a good going over - again.

 

I just checked and topped off my trans from '87 5ktq - it needed a good fill
after sitting on end for awhile.  I have it filled to proper level and that is
straight-forward.  The question pertains to the diff.  I notices that there is
a separate drain plug at the bottom of the center diff. in the rear of the
trans but no obvious fill hole.  I don't recall every seeing anything about
filling the center diff. and assume the fill is when you do the trans.  I
found no procedure for this or capacity specs.  I just want to make sure I'm
not overlooking anything, since it would be better to address this now than
finding I've neglected something once I get the car on the road.

 

I think I should do the rear diff now too - stock UrQ.  Any caveats?

 

Ben