TM 9-2520-246-34-1 d. Shifter Shaft and Top Cover. FRAME 1 1. Slide shifter shaft (1) into place in shifter fork (2). Aline setscrew hole in shifter fork with setscrew hole in shifter shaft. 2. Put in setscrew (3) and tighten setscrew to 90 to 118 pound-feet. 3. Put on safety wire (4). GO TO FRAME 2 2-260