Tenaci Torsendiff Dana 30 Fits Model : Volvo 140, 240, 740 and 940 Rear axle : 1030, 1031, 1041 and the aluminum axle (1030). Used with Tenaci upgraded 30 spline drive shafts. Splines : 30 splines NOTE 1 -  Fix the wreath on the diff. 2 - Check that the bolts for the crown wheel do not sink as there are both 20 and 25mm long original bolts. Oil : 80-90 oil or finer 80-140. Tightening torque Overrun : 50-70 Nm Crown wheel (Bolt without flange): 70-80 Nm Crown wheel (Bolt with flange) : 90-110 Nm Carrier M20x1.5 : 200-250 Nm