>>Does it not apply to modern stuff?
That's partially what I was getting at with my question about the diff coming out of the front or back of the axle housing.
If it comes out of the front, it's a simple unbolt the old one, remove and replace job - the preload of the pinion and crown wheel, and the backlash between them remain undisturbed.
However, if the axle is a Salisbury type, and the crown wheel comes out of the back of the axle housing, you can't do anything without disturbing these settings - and you also need to "spread" the axle to release the preload on the crown wheel - pita - OR, replace the entire axle.
I'm assuming here that the axle is a beam axle - it's all much simpler if the rear suspension is independent, and the diff housing bolts to the body via some rubber mountings.
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