How hard/expensive is it to switch out gearing on an A-body?

abodyjoe said

If running moser or from what dr diff says his axles the thrust button does not get removed. Have had multiple sets of moser axles with green bearings and never had to remove the thrust button an any center sections.

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Well, I did say "should not have". I recall having an issue using green bearings, with the thrust button. I was not happy having to remove the pig to remove the button after one of the axles bottomed out before the bearing was all the way into the axle tube. It happened.