Differential level plug

[Reckless Rat]

If you don't check the level with the axle hanging on the rear springs, you'll end up with too much oil in the diff, which will eventually escape via the rear brakes. The level plug will be below the tank if you check it this way. Put the jack/axle stands under the rear cross member. After filling, let it drip overnight before replacing the plug.

For the 'D' type axle, no more than 250ml from empty. 140 grade oil.