Fantastic information. Not sure which type of gearbox my ‘93 Plus 8 has, Someone told me it’s likely the LT77. The model number is 8A0179326.

https://flic.kr/p/2peH7vx

It looks like my filler nut is square - see photo below. The drain nut appears to be the one with the splash of yellow paint on it. Please correct me if this is incorrect.

https://flic.kr/p/2peGuLv

I was planning on using Castrol Transmax (meets requirements for ATF+3, Dextron III H and prior).

Thanks again for all your support.

Morgan Plus 8, 1993.