30-05-2023, 08:50 AM
Your first port of call would be a full gearbox oil flush, not just a drain and refill but a full flush with good decent oil like Amsoil. This could take up to 14 litres of oil before it runs true clear colour IIRC. THose more knowledgable will be along to show.
I recall my low mileage Legnum when I first bought it had a tendency to slip slightly and then gear hang before eventually changing into gear with a 'slap'
A full flush with Amsoil sorted this out and went on to survive to this...