Seal NAK 36x47x7 gearbox output and final drive input seal

This seals the gearbox output shaft. If this seal leaks, you’ll see gear out dripping from the back of the gearbox. Note that there is a larger seal for the output yoke, but that one should never contact any oil if this seal is doing its job.

This also seals the final drive's input shaft. Or more precisely, it seals the pinion bearing nut and pinion gear shaft. Note that the bearing nut also gets an o-ring during installation.