Everything to replace and upgrade your counter shaft drive gear seal.
- Original equipment oil seal and (2) O-rings
- Dirt Tricks tool steel dome washer in either orange, blue or black
Why a Dirt Tricks Dome Washer?
Our testing has determined that the OEM dome washer is made of mildly heat treated material. When that component is installed under a tightened countershaft bolt, it is taken well beyond it’s “yield” or “elastic” limit and permanently deforms. In that condition in cannot maintain the thrust pressure necessary to keep the sprocket tight to the splined shaft. That leads to two different failures. First, as described above, the O-ring is allowed enough clearance that is begins seeping. Secondly, the backlash between the splined shaft and sprocket is allowed to more freely pound in each direction, as the torque of power verses compression reverses itself.
Dirt Tricks has developed a tool steel, heat-treated dome washer that develops two to three times the preload force without reaching it’s elastic limit and without overstressing the mating components. This solves O-ring leakage as well as extending the life of both the countershaft and sprocket splines.
Also consider replacing the sprocket bolt with this upgrade, snapping them off is a pretty common occurrence when the bolts are used more than once.
Torqe spec 44.3 foot pounds