Stock Replacement Seal Replaces lower Shaft Seal On Original Steering Boxes Picture In 1959-60 Steering Box Rebuild Parts Diagram In Catalog As Number 6 This stock replacement steering box lower shaft seal is manufactured by GM or by one of its authorized suppliers for use as a factory replacement part. You will find the fit, finish and function meets all GM specifications. Using stock replacement parts from the El Camino Store, such as this steering box lower shaft seal, is a sound investment in the restoration or repair of your vehicle.