Gear Diff oil

[Bosscat]

I have a gear diff with 100k oil in it but want to change it with the oil being best described as gloopy is there a quick way to get it out?

[mattr]

Brake cleaner.

Rag,

Patience.

[szymanski2oo1]

You can wipe out the worts of it with a tissue , then pour in some shock oil and twist the gears until it blends together , then tip it upside down and it should run out easily... Saw this trick somewhere online.