Quote:
Originally Posted by Classic rally
Hi
I have just rebuilt my diff. I have changed the bearings, seal but could not get new pinion shims so used the old ones. There were 3 shims on the pinion.
I am having a real problem torquing down the pinion nut. I have watched the video on amazon cars which is helpful. It gives a torque value of 280 to 300 newton meters (nm). The facebook group gave me figures from the haynes manual of 220 to 240 nm I believe.
The issue is that when I torque the nut to 130 nm which is the maximum my torque bar goes to the pinion is so tight that I can no longer turn it by hand. If I torque it to 280 or 300nm it will be so much tighter it may ruin the bearing. From my understanding you should be able to turn the pinion by hand and using feel, feel if there is too much or too little play but it should turn by hand.
Has anyone done this job before? I would be grateful for some guidance please as I don't understand how the haynes manual and other sources quote such high torque settings.
Thanks
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You would need a thicker shim then... the nut torque shouldn't be used to "adjust " the force used to turn the pinion.. just do it up to the correct torque... and use thicker shims until the turning torque is correct with the nut torqued to the correct figure. ( 200-220 Lb/Ft ) I suspect you have grossly overtightened the nut however...