Windshield wiper pivot mounting

In a mounting for a windshield wiper pivot shaft on a vehicle body panel for rotation about an axis of the panel, the combination comprising:

• a transmission housing adapted to be rotatably seated on a first side of the panel for limited rotation in a first direction to a mounting position and having
• a base defining a base surface adapted to seat against the panel,
• a tower projecting from the base surface,
• means defining a pivot shaft support bore through the tower on the axis of the housing,
• means defining a first pilot surface proximate to the base surface and
• a key projecting from at least one of the base surface and the tower and proximate to both and having means defining
• an indexing surface radiating beyond the first pilot surface normal to the base surface and approximately parallel to the axis of the housing and
• a retention surface opposite the base surface adapted for disposition over the panel when the transmission housing is in the mounting position thereby limiting axial movement between the transmission housing and the panel,
• means on the panel defining an aperture having
• a second pilot surface adapted to rotatably receive the first pilot surface and
• a keyway intersecting the second pilot surface adapted to receive the key and having means defining an abutment surface adapted to stop rotation of the transmission housing in the first direction beyond the mounting position by contact with the index surface, and
• a plurality of fastener means adapted to rigidly fix the transmission housing base to the panel in the mounting position distributed about the tower and to be installed from a second side of the panel opposite the first side.