I have a 1500 Spit gearbox and overdrive in my 13/60. The box is noisy in 1st, 2nd, and 3rd but is (relatively) quiet in top gear. I suspected that worn layshaft bearings were to blame, so I've pulled the gearbox out. I have removed the bellhousing and find that the 3 springs retained by the bellhousing to apply pressure to something? in the gearbox , are missing. What are these springs for, and could they be the reason the box is noisy, . All suggestions gratefully received. Cheers, Dave.