With unmodified components the 1350 series CV will flex between 20 & 30 degrees prior to binding. This variable will be due to inconsistencies in the castings, the design and manufacturer of the components.
https://www.aulro.com/afvb/images/im...012/01/965.jpgIn order to achieve greater flexibility in the drive shaft, we can do some machine work to the CV components. Maximum flexibility requires removing the sealing element in the center.
With most manufacturers components, the 1310 series will flex to about 30 degrees before experiencing the bind. With some tough off grinding to the CV components prior to assembly, this we can usually attain a nominal 35 degrees of flexibility.
The center pivot point on all our1310 CV’s will have the grease fitting, allowing for periodic re-lubrication. Some 1350 CV’s will have the grease fitting and others will not.