TM 9-2320-209-10-3 CHAPTER 20 REAR WINCH TROUBLESHOOTING PROCEDURES, TRUCK M756A2 20-1. GENERAL. Detailed troubleshooting procedures for the rear winch, truck M756A2 are given in this chapter. 20-2. PROCEDURES. These troubleshooting procedures are used the same way as the sample troubleshooting procedure given in chapter 7. 20-1