My nitro truck doesn’t run right. I really have to rev it to get it going, and then it seems as if something’s slipping. I checked all the axle nuts and tightened the slipper clutch, but it didn’t make a difference.
Good call on making sure that all your spinning stuff is properly secured, but you didn’t follow the drivetrain back far enough. The engine’s clutch is the likely culprit—or, to be more precise, the clutch shoes. The clutch shoes are attached to posts pressed into the flywheel. As the flywheel spins, centrifugal force swings the shoes outward to contact the clutch bell and engage the drivetrain. The shoes wear with use and also deposit material inside the clutch bell. Shoe wear, clutch-bell glazing, or a combination of both will eventually allow any nitro vehicle's clutch to slip. The fix is to buy a new pair of clutch shoes. Traxxas sells the pair complete with clutch spring, and you should always replace the spring along with the shoes. Before installing the clutch bell over the shoes, clean the inside of the clutch bell and use a scouring pad to remove any glazing. For a complete how-to on clutch care, check out our September 2012 issue.
Clutch shoes wear with use. When replacing them, install a new clutch spring as well.
Even new shoes will slip if the clutch bell is glazed or greasy inside. Give it a good cleaning before you reinstall it.