My son has an Audi A4 in which the gearbox has started to become noisy and he was reccomended a product called "Lucas Heavy Duty Oil Stabiliser" to quieten it down.
Please see the link below:-
http://lucasoil.com/products/engine-oil-additives/heavy-duty-oil-stabilizer This product is made in the USA but is readily available in the UK.
It is stated as suitable for both engines and gearboxes and apart from increasing the lubrication qualities of the existing oil, it is also claimed to make gearboxes and differentials considerably quieter. On the bottle it states that it is also recommended for high performance motor cycle engines, such as Harley Davidson. It is also claimed to cling better to cylinder walls and prevent dry starting.
I immediately thought of noisy bevel boxes as a possible use for this product and although mine is tolerable, I know it is a common problem among us owners of 5 speeders.
The fact that it states that it is suitable for H.D.s, it would probably be OK in our X-Wedge engines.
What do you other guys think?
