Ive had my 93 tdl fieldman since june and its always had this noise - in fact it had it for the 3 years the previous owner had it too and before (he only did about 8k in 3 years though) - hard to describe, the box functions ok but you can hear a scraping noise for want of a better description - a bit like a chisel on an oilstone - its more pronounced on load of accelleration and overrun - and you can almost lose it with a sweet spot with the slightest of press of the gas pedal. obviously its only when in gear and moving!!
leave it till it goes? well known problem? easy fix?? search for a box now??
any help appreciated
might be able to record it if it helps lol!