-Fresh o-rings, seals and gaskets wouldn't be a bad idea prior to installation. Mounting studs, nuts and lock washers on front gasket flange have been removed prior to shipment to prevent damage, but are included and easily reinstalled. O-rings and gaskets are available new. The piston o-rings still function, but have some flat spotting and should probably be replaced soon while the unit is out. They air check well with the solenoid energized and the input shaft installed in the unit, solenoid works well, though o-rings inside and out are used otherwise and can be serviced with the OD unit installed in the car (pan comes off the bottom, solenoid is removable for its O-rings). I only buy OE o-rings, I''ve had some problems with aftermarket versions.
-Run as-is or freshen up some o-rings and inspect it, see photos in detail.
Pictured is what you will receive.