I just purchased a 1998 2.0L automatic Beetle for my daughter. I knew it had many problems when I purchased it and have been working through most of them. The speedometer is not working and there is a code P0501 for the VSS. Through searching on this site I have been able to narrow down the issue. It seems it is not being driven by the transmission. When the actual VSS is driven a drill, the speedometer will work. I pulled the piece below the senor out of the transmission and it seems OK. When this piece is installed in the transmission, it can be turned easily so it seems the gear is not engaged inside the transmission. What would be the next step? Can the cover on the back of the transmission differential case be removed to repair the issue? I know I need a service manual but have not bought one yet. Any help would be greatly appreciated.