I had a rattle emanating from the gear box in my 94 +8 which turned out to be grub screw coming loose on the remote gear shifter. Certainly make sure you have eliminated all the easy fixes before you start taking the engine and gearbox out.
Bruce 1964 4/4 Series V Comp (Megan) 1994 +8 (Maurice) tis no more 2013 M3W (Olga)
