I want to change the oil in my gearbox and final drive.I've bought some Shell Spirax 80w-90 oil. It says 'axle oil' on the bottle and high quality/heavy duty.The specs looks ok at SAE 80w90. API GL-5 , but is this likely to be ok. Bits of says just put it in,but I want to check with you ,more knowledgable members of the forum. Ta.
Marcus.
Marcus.

