Here, you can see the detents that control the fore-and-aft movement of the slider over the synchronizer hub. The T-56 design (right) used a crude but effective hoop-style retainer to hold three stamped-steel keys in place. The self-contained, ball-and-spring-loaded detents in the TR-6060 and Magnum (left) are far superior at locating the slider and controlling the motion between shifts. This translates in to greater durability and noticeably improved shift feel.
Here, you can see the detents that control the fore-and-aft movement of the slider over the synchronizer hub. The T-56 design (right) used a crude but effective hoop-style retainer to hold three stamped-steel keys in place. The self-contained, ball-and-spring-loaded detents in the TR-6060 and Magnum (left) are far superior at locating the slider and controlling the motion between shifts. This translates in to greater durability and noticeably improved shift feel.