Eaton Truetrac seems to have a lot better reputation for durability. Been very pleased with mine and it sees dragstrip duty.
The unit was basically destroyed inside. Pieces everywhere, took an act of congress to get the axles out. Wavetrac has agree to give me a refund after inspecting the left overs which I requested. Atleast they are standing behind it.
I talked to a guy last night that has been through two of these and ended up putting a fac carbon fiber diff it temporarily till he decides what to do. He told me that these units are made buy another company for Moser and that after the second one failed they had him send it strait to the company that manufactured it. I cant remember the name of the company though. They did refund him though and told him the are aware of the issues and have a stonger unit coming very soon.
For $1,000 they should have been strong to begin with