Spacer for cardan extension.
Easy and quick to install.
At BMW x5 common problem with front splined shaft and splined part of the transfer case. If a standing machine when the D or when switching from D to R in a characteristic ringing “ding” of a machine or a small crunch means Slotted part worn. Slotted shaft part enters the spline transfer case only 1.2 inches and this part and account for the bulk load. As a result of the spline wear out.
Thanks to the spacer, the slot part goes deeper and this eliminates excessive backlash in the slot connection.