Ok, what range of dial wrench iam looking for, is it the same as a digital torque wrench? Is it accurate the metod you made? Iam just thinking about when you do a little at the time torque on the nut to get the correct torque, its maybe easy to do a little to much and thats it..And maybe not so easy doing this when diff is still boltet on car.

How about cut some new slots for the old nut in the pinion so it will be possible to lock?