Changing front diff oil in 99 Jackaroo

Spud- it need’s to be sucked out the filler hole half way up the diff; you can probably buy a hand pump from an auto parts store to suck it out.

The additive is probably a friction modifier. Is it a rear LSD?

Hi Spud, have just gone through the same excercise.
There is a drain hole, you actually have to remove the lowest bolt on the rear of the housing. I did it and nothing came out, I then had a little jingle with a piece of wire and whammo out came the oil. I think it was just a little bit of sealer filling the gap.
As for the LSD addittive it is to eliminate "chatter" in the LSD diff friction plates.
Some oils have no need for the additive, check manufactorers web sites for info.
Will

Spud09,The additive I got from Holden was Penrite Limslip Additive.Cost about $35.I made enquires at an auto parts place later and the price was about $14.Holden ripoff at it again

Indeed re the above - the lowest rear bolt - its a manufacturer's compromise of course - the hole is small and the oil is thick - best to drain it overnight, after arun with the hubs locked ON to warm the oil up - of course, don't select 4WD if on the blacktop :-) ....... I have been filling mine up to the hole (instead of the 1.4 L specified, but the rear holds about 3 L if you keep going ! That only leads to weeping and a wet diff housing in the case of the rear - the front seems ok if full.

Thanks for all your help. I'll get in and change that front diff oil.

Cheers