TM 9-2320-209-20-3-1 9-7. TRANSMISS1ON TRANSFER OUTPUT COVER SEAL AND AIR VENT REMOVAL AND REPLACEMENT. TOOLS: Cross-tip screwdriver (Phillips type) 9/16-inch wrench 7/16-inch wrench SUPPLIES: Seal, transfer output cover Solvent, dry cleaning, type II (SD-2) , Fed. Spec P-D-680 PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. Preliminary Procedure. Remove intermediate and rear tunnel. Refer to Part 3, para 18-5. b. Removal. CAUTION Cover holds down poppet ball for shifter shaft and will spring up when bolts are loosened. Do not let spring fall into transmission transfer case. 1. Using 9/16-inch wrench, unscrew four bolts (1) and take off four locknuts (2). 2. Lift off cover (3) and take off seal (4). Throw seal away. 3. Using 7/16-inch wrench, unscrew air vent valve (5) from cover (3). END OF TASK 9-51