10/43 Crownwheel and pinion wanted

Hard to find with this gear ratio...

Coppola Old Timer close to Napoli did fix my brother's 365 diff. He also fixed my cracked cylinder head (previous repair by my machinist had failed). So good experiences with him.

 

For whatever reason that ratio is very difficult to find and if you do its frightfully expensive. Id concentrate my search to finding a used complete differential from a car being parted out.
If you must, it would be less expensive to get new gears made by one of the few who specialize in fabricating differential gears.

 

These diffs are much more fragile than the ones on the auto, probably due to the smaller bevel gear that "bites" the crown wheel at a more agressive angle. The main axle does also turn significantly faster (Overdrive gearbox), which probanly makes things worse.

Needless to say used diffs are almost impossible to find.

Cutting a set of gears was close to €3600. Fixing the existing diff in Italy was a third of that. Not sure how the diff will hold in the long term, but after two years it still works. At that price level, that's good value for money.