It would be a Phase 2 Salisbury 7HA axle.
Its quite a long lived unit capable of tolerating a lot of abuse! Spares other than bearings, gaskets and oil seals are a bit of an issue.
I've a championship winning competition car in my workshop at the moment having is axle rebuilt at 188,000 miles!
A good quality branded 75/90 oil would be best.
Drain through the bottom and fill through the one in the diff cover until you can't fill it any more! I don't know whats been added but by its location I'd guess its some kind of breather
A couple of pointers:
If possible, drain the old oil off into a white plastic container, if it comes out looking like gold or silver paint then you have a problem.
Make sure the breather hole in the axle tube is clear, this is an 2mm hole on the RH axle tube, make sure thus is clear as if it is blocked the axle will pressurise and leak past the seals onto the rear brake shoes
The fill/level plug sometimes works loose so a couple of turns of PTFE tape wouldn't go amiss here. I always drill the fill and drain plugs for lock wiring but thats just me!
Keep an eye on the front oil seal as they do leak and a bit of a pain to remove and replace with the axle in the car
Arwyn
