It looks like this Part has been superseded by LEGO Part 9244 Technic Universal Joint 4L [Complete Assembly].
There are three functional versions of this part:
9244a Technic Universal Joint - Old Style
This is the oldest version, used from 1972 to 1974. It is four studs long, and only known in Red.
9244 Technic Universal Joint 4L [Complete Assembly]
This is a modernized version, used from 1973 to 2009. It is four studs long and known in Light Gray and Light Bluish Gray.
61903 Technic Universal Joint 3L [Complete Assembly]
This is the modern version, introduced in 2008. It is three studs long and only known in Light Bluish Gray.
LDraw mapping 575c01 enabled. It is showing incorrect color, which will be corrected shortly.