If the pinion nut isnt done up with a bucket load of torque then there is something wrong with your calcs of how to do up the pinion nut.

I am very skeptical of the suggestion of doing it up to the same number of turns.

The preload on a pinion is set by the thickness of the spacer shims between the bearings.

How much torque did it take to loosen it? Basic machine design tells you that you will need to torque it to a larger amount than that.

If you have it anything but real tight, expect a diff failure very soon.

The configuration of the pinion bearings is nothing like front wheel bearings.

I strongly suggest you go and talk to a diff re-builder who is doing this sort of work all the time.

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1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
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