Right I'm going to change the gearbox oil again as a last resort before the box comes off again. I've got the propshaft out of the box and the front of the car jacked up to drain out the oil.

Ive read a few various threads online about which oil to use. Comma Sx75W-90 GL4 is what's going in. Anybody have any objections to this oil before I put it in 😂 ?