Arrangement of a vehicle door with extendable window

An arrangement for a vehicle hard-top door having an extendable window comprising:

• a door body forming an envelope having an inner panel spaced from an outer panel with a top opening;
• a window pane positioned within the door body between the inner and outer panels, the window pane being extendable through the top opening, the window pane having a bore along its lower end extending therethrough;
• a channel member vertically extending within the door body for vertically guiding the window pane;
• a guide block slidably mounted on the channel by bearings wherein the channel member is inserted within the bearing, the guide block having a bore in general alignment with the bore in the window pane, the guide block having at least one contact surface and the guide block having a projecting ledge with an alignment aperture;
• a polymeric insulator, the insulator having a first inner member joined to a second outer member by a bottom wall, the first member, bottom wall and second member generally forming a U-shaped opening for receipt of a lower end of the window pane, the first and second insulator members having a bore generally aligned with the window pane bore, the first member having a cylindrical portion for extending through the window pane bore and the cylindrical portion having a snap fit connection with the second insulator member, thereby retaining the insulator to the window pane, the insulator member further along its bottom wall having a tab for alignment in the alignment aperture of the guide block;
• a retainer plate having a first surface joined to a cylindrical projection for protruding within the cylindrical portion of the insulator, the retainer plate cylindrical portion having a threaded interior;
• means to hold the retainer plate from rotating with respect to the second member of the insulator;
• snap-in retention means projecting through an aperture in the retainer plate to join the retainer plate with the insulator and pocket means aiding in the retention of the retainer plate second member of the insulator;
• and
• a fastener joining the guide block with the insulator, the window pane and the retainer plate, the fastener having a threaded shank for engagement with the cylindrical projection of the retainer plate and a head portion abutting a side of the guide block generally opposite the window pane contact surface, thereby allowing an assembly of the window pane, insulator and retainer plate, to be joined to the guide block through the top opening of the door body subsequent to the guide block being mounted on the channel.