We are about to change the lubricants in our 4 speed Rover gearbox and the LSD differential. While I've been browsing around, it's not totally clear what to chose. The Morgan Handbook says 75W/80 gear oil for the 4 speed box, but doesn't mention GL4 or 5..? And for the rear LSD diff, it says Hypoid SAE 90 LS. Hence, are there consensus about what to use and are there any prefenential brands to go for? Cheers /Finn
