TM 9-2320-209-20-3-3 18-5. CAB TUNNEL REMOVAL AND REPLACEMENT. TOOLS: 7/16-inch wrench 11/16-inch open end wrench 5/8-inch open end wrench SUPPLIES: None PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Removal (Front, Intermediate, and Rear Tunnels). FRAME 1 1. Slide rubber boot (1) up gear shift lever (2) as shown. 2. Using 11/16-inch and 5/8-inch wrenches, unscrew nut with flat washer (3) from bolt (4). Take out bolt and lift off gear shift lever (2). GO TO FRAME 2 18-10