Re: spigot bush
thats the problem, auto dont have one cos the input shaft is in the torque convertor.
every manual in the world should have one in some shape or form. If you dont have one your input shaft will not be supported and under heavy load could put stress on the bearings in the gearbox and 4th gear.
At idle with your foot off the clutch it will usually clatter like mad without one, like the release bearing is knackered. i put an isuzu in a 300 disco and our adapter fir the spigot bush was too short and didnt reach, it drove ok but made a hell of a racket and would have probably killed the box soon.
Is it a dual mass flywheel?