As a dealer of Wavetrac LSDs, we get asked what gear oil is recommended for use with a Wavetrac limited slip differential. Below are the recommendations from Wavetrac:
Your new Wavetrac® differential is incredibly durable and will withstand the harshest environment… as long as suitable oil is used.
Many customers ask what oil we recommend for use with the Wavetrac® differential. We feel the best answer is: Use the “factory fill.”