Thank you very much to all for their inputs. Ref. below, only thing I wonder is if there can be a malfunction of the LSD even if there is no noise from it?
Track rods and front wheel bearings are OK
I havent checked the internal of the LSD, and I do not know how it works. But as I understand my readings on the internet, things should be fine if there is no noise – and there aren´t. Axle location, oil quality and tyres are OK.
Crosshead is true, and there is no movement.
Tracking has been checked again and is OK.
Engine and gear box mounting are OK.
All wheels are checked and no play anywhere.
Car has a collapsable steering column and a steering box, and to my knowledge no preload adjuster. There is very little play in the steering system at all – 7-9 mm measured on the rim of the steering wheel.
Thank you again to all.