The T-18's are not new at all. Here is a link to some info on the T-18. Borg Warner T-18

Hope this sheds some light on your situation. And the transfer case you speak of...if it is an 18 would be the Spicer 18. Spicer 18

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1981 CJ5,258,T-176,D300,AMC 20,Dana 30,Trxus M/T 31x10.50, Rancho 5000's, GroundPounderFab front bumper, polyethylene gas tank, aluminum dash, AutoMeter gauges

What this country needs is unemployed politicians.