TM 9-2520-246-34-1 b. Countershaft Assembly. NOTE If working on transmission transfer model T-136-27, do frame 1. If working on transmission transfer model T-136-21, go to frame 2. FRAME 1 1. Bend ears on retainer lock assembly (1) away from two capscrews (2). 2. Take out two capscrews (2). 3. Take off retainer lock assembly (1) and retainer 4. Take off sleeve (4). GO TO FRAME 2 plate (3). 2-134