When I rebuilt my drive shaft I noticed that the large nut was actually a collet type arrangement that clamped the driveshaft at one specific length and not allowing extension of the spline coupling like on a rear wheel drive American car. The differential of the SL is fixed so extension is not necessary. Therfore I tightened my nut with all other shaft hardware installed and tight and the engine and transmission mounted in place. Slight axial extension of the drive shaft due to engine torquing will be taken up by the flex couplings.

I have no whine.

John Roncallo