1938 Buick Dealer Service Manual set. This pair of Shop Manuals cover the Self-Shifting Transmission in Series 40 Buick Cars. These were used to educate Service Staff on the operation,service and repair of these Transmissions. It has information, troubleshooting, procedures and illustrations to help repair these Transmissions. They are in good condition for their age with normal wear, blemishing and soiling from use in a Dealership [see photos].