OER Parts offers a wide selection of Manual Transmissions & Parts for your 1964 GMC 2500 Series. OER Parts offers 1964 GMC 2500 Series Bearings, 1964 GMC 2500 Series Boots, 1964 GMC 2500 Series Complete Transmissions, 1964 GMC 2500 Series Flywheel, 1964 GMC 2500 Series Gaskets, Seals & Filters, 1964 GMC 2500 Series Gears, 1964 GMC 2500 Series Hardware, 1964 GMC 2500 Series Shift Knobs, 1964 GMC 2500 Series Shift Linkage, 1964 GMC 2500 Series OE Shifters, and 1964 GMC 2500 Series Performance Shifters.