The vechile speed sensor on 2000 Ford Explorer 4L is located on the bottom left side of your transmission.
On a 1999 Ford Explorer Sport : If the 8th " character " of the VIN is an " E " it's the 4.0 liter Single Over Head Cam , V6 engine ( SOHC ) If the 8th " character " of the VIN is an " X " it's the 4.0 liter Over Head Valve V6 engine ( OHV ) which is a pushrod design engine
Single Overhead Valve Engine
I believe it is on the backside of the engine air intake tube ( between the engine air filter and the engine throttle body )
The 2008 Ford Explorer has single overhead cam (SOHC).
The 2002 Ford Explorer has single overhead cam (SOHC).
The 2007 Ford Explorer has single overhead cam (SOHC).
The 2001 Ford Explorer has single overhead cam (SOHC).
The 2004 Ford Explorer has single overhead cam (SOHC).
The 2003 Ford Explorer has single overhead cam (SOHC).
The 2006 Ford Explorer has single overhead cam (SOHC).
The 2010 Ford Explorer has single overhead cam (SOHC).