TM 9-2520-246-34 Figure 3-36. Removal Second-Speed Gear, Second- and Third-Speed Synchronizer and Synchronizer Sleeve. 3-10. Assembly of Subassemblies. a. Shifter Shaft Cover. (1) Using a new oil seal, install the first and reverse shifter shaft oil seal. (See fig. 3-45.) NOTE Soak felt seal in universal gear lubricant (GO 90), MIL-L-2105, before assembly. (2) Slide the lower shift lever into cover at fulcrum pivot pins. Install lower shift lever, cup, spring, and lockring. (See fig. 3-46.) (3) Place the interlock plate into position and install the springs and plate spring washers. Plate spring washers are installed between the springs and the shifter shaft cover. (See fig. 3-44.) Install the safety nuts and bolts. (See fig. 3-41.) Figure 3-37. Removal of Second-Speed Gear, Second- and Third-Speed Synchronizer and Synchronizer Sleeve. Figure 3-38. Removal of Countershaft Drive Gear (Fifth-Speed Gear). (4) Turn shifter shaft cover upside down, and insert the springs and poppet balls into the shifter shaft cover holes. (See fig. 3-43) Depress the spring and ball with a punch and slide the shaft through the shifter fork cover. Use the same procedure for installing the remaining two poppet springs and balls. Figure 3-39. Removal of Countershaft Fourth- Speed Gear. Figure 3-40. Removal of Mainshaft Rear Bearing Cap Oil Seal 3-17