Wally, this is the order number out of the zf-trading catalog. The original 915 spline size comes in @ 20,1x22,3-20N. Did lot's of research in the catalog to find this. Got one on ebay for 20€ and found out that it really fits firmly on the 915
shaft. Believe this will make life easier for those crazy enough to force this gearbox into a beetles arse.
SACHS 1862 256 131 Kupplungsscheibe
* ab Fahrgestellnummer : 6156485
* Kenngröße: 228TPB
* Durchmesser [mm]: 228
* Nabenprofil: 20,1x23,1-20N
* Zähnezahl: 20