WK2 Quadra Trac1 Transfer Case Fluid

Any idea what is equivalent to ATF 3353? I’m having trouble understanding what is what or if the online search “suggestions” are correct.
Also, should I try to flush my transmission at 165k miles or just be easy on it until it blows? Starting to get hard shifts that are very very seldom. Could be 2 a day or once a month, just varies. 90% Texas highway driving.

Thanks as always
 
Welcome to the forum... Why don't you head on over to the "give us a wave" thread and introduce yourself
 
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