Hey Stretch, You should get your hands on a manual that describes how to set up a crown wheel & pinion. It will show the polish (ware marks) I speak of.
You are correct about the 2 direction adjustment.
The pinion location (how far back it is) is critical. The crown wheel can then be moved sideways to give the correct backlash. If this is not done correct the crown wheel & pinion will not mesh properly as its hypoid gears.
You should also have a close look at the spider gears. You will probably need to re-shim them.
Best just play with diffs one at a time.
Crown wheels & pinions are put together as matched pairs.

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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
2001 jeep turbo diesel 130k miles
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1968 Ford F750 truck. 6-354 diesel conversion.
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