Ashcroft Transmissions new generation of Heavy Duty halfshafts are made from "4340" Alloy Steel and are supplied with a FIVE YEAR replacement warranty against breakage.
These shafts are made to fit the later "slim" hub driver (15mm) as fitted to the 300 TDI vehicles.
Ashcroft Transmissions rear shafts will need a pair of separate outer drive flanges if you don"t already have them. Halfshafts for the 90 rear up to Vin No LA930456 have separate flanges so it will not be necessary to replace your existing flanges unless you wish to upgrade to Ashcroft Transmissions heavy duty flanges. Halfshafts after this Vin no have integral flanges so it will be necessary to purchase both the halfshafts and the Ashcroft Transmissions drive flanges.
The half shafts and drive members Ashcroft Transmissions provide are warranted against BREAKAGE, not against wear caused by 'fretting corrosion' of the spline/drive member interface. This 'fretting corrosion' is a direct result of lack of lubrication, a design fault, and is common on grease filled hubs, we therefore recommend removing the half shaft seal to allow oil to migrate along the half shaft to keep the spline lubricated.