Hi there, iv got a 1994 sammy 1.3i. Got a weird noise when i accelerate hard, had it a while and a friend says his does it too but its just bec its prop driven. Anyway i thought i'd try engaging the freewheeling hubs and see if it goes or anything changes. Is it normal to have a noticable vibration around 40mph+ or is it normal? Thanks in Advance.