I have a 2001 ezgo with a posi from BU and I works great easy to install with great directions.
I have a 01 ezgo txt with 700 amp controller and speed and torque motor and 8 six volt battteries and the posi helps allot climbing out of holes and over rocks.
the first picture is of stock spyder gears, the second shows posi unit installed. third is a better shot with differential out of housing.
http://www.buggiesgonewild.com/extre...-rear-end.html