How hard are they both to change and what do I need? I have a 96 disco with a 5 speed if that matters/

 

diffs are easy. transfer case is more difficult and you will need a pump to get the fluid in. the fill plug is to the left of the parking brake drum. youll need about 2 quarts of fluid for each diff and i think 3 quarts for the transfer case. i put red line heavy shockproof gear oil in the t-case to keep it quiet and cheap conventional gear oil in the diffs changed often.

 

When you say conventional, does that mean 90W? How about the oil in the swivel *****, will thatdrain and fill with the diff oil?

 

I think Arsell means non-synthetic (conventional) oil in the diffs since he changes it often, synthetic is more expensive. You'll want this for the swivel housing.

 

Now I needmore clarification. Are you saying the swivel housing contains grease like the hub bearings? According to that Atalntic British link, theyrecommend using grease instead of oil, because the grease will not leak around the seal like oil. Regardless if you use grease or oil, is the swivel housingself contained like the hub bearings?

 

The swivel is self contained,, it has 3 plugs on it drain plug level plug (when housing was full it would
drain from the plug so you would know it was full) and the fill plug.
Most have been changed to the grease.

 

Does it require disassembly of the swivel housing to change to grease? Or can you drain the oil, and squeeze in the grease?

 

Candiman and Sdilevre-All you need to do is take your grease gun and stick the nozzle into the top (Fill) plug on the swivel ball, 20 pumps with the grease gun on each side. I do this every 10,000 miles which is every other oil change.
As for the differentials and the transfer case, you can use any good gear lube, I use 85W-140 and it helps to quiet things down. The hardest part of that is refilling the transfer case. You will need a hand pump.

 

To see if you have gear oil in you can pull the fill plug and drain plug if you get oil coming out
get the grease one for each side then drain the oil.
If nothing comes out you have the grease,, your done nothing else to do.

Its easier to turn the wheels to get the grease in once the fill plug is out you will see which way
to turn the wheels I can't remember.

You can over fill the swivel housing and it will push the grease in to the diff passed the inner seal
so when you check the gear oil in the diff it will be gray ( don't ask how I know).

 

any grease will work?? also what coupler for the grease gun??