Steve Hannes: The mainshaft has no visible means of bearing load adjustment. It is fixed by the inner case dimensions. The tapered bearing races at either end are fitted to the case housings. That means then, load is set by bearing positions on the shaft. Those are pressed on. There are standards in the industry for endplay on a shaft assembly like this, so in the instance of a transfer case rebuild (where this posting is going), an endplay tolerance of .001" or less is probably acceptable. For the countershaft, it first uses a "thickness" thrust washer to "ballpark" fit into the case. Then there is an external nut with a crush collar threaded on to the countershaft end that is torqued (to an unknown spec) to achieve proper load on the tapered bearings. ***** more info: http://jagmotorproject.blogspot.com/2007/02/motor-project-17-transfer-time.html *****