I've been told that there is an oil pump in the gearbox that is driven off the input shaft so if the box is in neutral then the oil supply is compromised if the output shaft is turning. Not a problem for a short bit of coasting but if correct then could do damage if towed for any distance.
I'd heard that too but someone pointed out that it's fine to tow an MX-5 with the same gearbox so the oil pump theory doesn't really make sense - but then it is Morgan we're talking about........
