F 355 clutch shaft broken photo

Any parts i have to change
Help.......me

OK, you have broken the driveshaft (the inner shaft) not the clutch shaft (the outer one).

Can you tell us under what kind of driving circumstances the shaft breaks?

Can you give us a picture of the end of the shaft so we can see the surface texture on the metal where it broke (both ends prefered) and can make some kind of statement as to what kind of stress the shaft was under when it broke (tension, compression, shear, torque).

I suspect a flywheel problem. You see, Ferrari designed the driveshaft on the 348/355 to have a particular set of strength specifications. The distance between the crankshaft and the flywheel, the stiffness of this shaft, and the mass of the flywheel are used to control engine vibrations. Something has moved out of spec, either the flywheel or the engine, and the new kind of vibrations are causing large torque moments in the driveshaft. The driveshaft is mearly the victim of a different problem.

The other possibility is that the transmission is no longer square to the engine or that the transmission is no longer square to the clutch. (and I have no reason to suspect this)

Is the engine in stock condition? Running smoothly? Starts immediately?

Does the transmission shift smoothly and snick between gears?

Is the clutch smooth in engagement and in release? At idle and at high power levels? Ever hear a clunk associated with clutch release?

Based on these pics, I'm going to surmise you have a Flywheel/Flywheel Bearing/Clutch-Flywheel Balance issue and possibly a combination of 2 or more..

The Large Bearing that supports the rear side of the Flywheel may well be bad, or the Flywheel/Clutch Assembly very badly out of Balance. Could be a combination of both problems.

Has the Flywheel ever been repacked?? If so, then the possibility exists that it was somehow packed wrong or reassembled wrong. The rear freeplay adjustment should also be carefully scrutinized upon reassembly.