Everet,

Thanks again!!! Unfortunately the KIA dealer installed them when my OEM auto hubs failed. But I've got a Warn Red Letter dealer 2 miles from my house and I'll contact them to see if I can get them warranted through them.

The OEM units used 1 diaphragm and vacuum to actuate the hubs. The Warn Auto hubs upgraded the number of diaphragms to 2 to get a better seal. Basically the first diaphragm acts as the seal and the second diaphragm acts like the OEM unit but is made of a more pliable material.

This is a much better design than the OEMs and if you are an occasional wheeler the Warn autos are a great way to go. They are almost as strong as the manuals, but you don't have to get out to lock them in. However if you live in a cold environment and have lots of salt or sand that gets put down in the winter there is the change you can get some up in-between the diaphragms and keep them from operating until you wash them out or it worms up enough to have it work its own way out.

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