Where can I get spline shafts?
There are three options: Use the OEM Audi output shafts, obtained from Audi or a salvage/junk yard. Manufacture your own to the spline specification given on the M021DHU General Fact PDF file (Older Differential) or the 012000 General Fact PDF file. When using OEM shafts, the rear output shaft is recommended due to its shorter length. Contact Paradigm Motorsports for already made shafts for the University Special. Click on the Torsen Splines button or Torsen Splined Bars hyperlink for more information. (Paradigm Motorsports is not affiliated with JTEKT Torsen North America, Inc.