OER Parts offers a wide selection of Manual Transmissions & Parts for your 1973 Buick Estate Wagon. OER Parts offers 1973 Buick Estate Wagon Bearings, 1973 Buick Estate Wagon Boots, 1973 Buick Estate Wagon Complete Transmissions, 1973 Buick Estate Wagon Flywheel, 1973 Buick Estate Wagon Gaskets, Seals & Filters, 1973 Buick Estate Wagon Gears, 1973 Buick Estate Wagon Hardware, 1973 Buick Estate Wagon Shift Knobs, 1973 Buick Estate Wagon Shift Linkage, 1973 Buick Estate Wagon OE Shifters, and 1973 Buick Estate Wagon Performance Shifters.