Your expansion valve should sit between the drier and the evaporator.It should be right in the firewall '''connected''' to the evaporator. [http://www.keepandshare.com/doc/2972060/automatic-air-conditioner-pdf-july-10-2011-12-00-pm-3-4-meg?da=y|Here is] the part of the service manual that deals with the AC. This is for an automatic transmission. Let me know if you need the manual transmission version. Good Luck