Hello,

When i was painting my diff all the oil leaked out. Now that wasn't a problem but i'm now at the stage of mounting the rear axles and i don't now how much oil the diff needs. It's a standard Sierra diff. And what kind of oil does it need. Is Transmission oil also oké ?
Marco Tuinenburg

it will take about 1 litre of ep80/90 oil,when it,s mounted just fill till it comes out the filler plug and thats it

0.8 or 0.9ltr depending on model from dry or 10mm below filler hole otherwise. Oil grade is hypoid sae90ep.

[Edited on 16/4/04 by Peteff]

just did mine - took 0.9 litres before it started to dribble out of the filler hole.

incidently, I drained my diff of the old oil using a marine oil change pump I bought from the local marina supplies. Easiest way I have ever found of removing the oil from a diff or gearbox. Pump was £7, image below.
Rescued attachment oil pump.jpg

Oké, and the fillerhole is that the big bold on the diff or is it the small pipe at the top of the diff ?

its the plug on the back of the diff,small hose is breather