Only values I can find refer to rear axle - flange, cap, crown wheel etc - even then it depends upon type, and the wheel nuts. Also, can find some on rear brakes, and plenty of info on front end but not rear suspension it seems. It would appear that there might be different tightening procedures that apply depending upon which type of rear shocks are fitted. Saloon and Estate are not the same. If you haven't got the old ones off yet, have a very careful look at how things are put together. There is a Volvo 120/130 Haynes manual on E-bay right now. Item number is 190134977482 Might be worth a look! Good luck Jack