I need some schooling on my new A833!!!

Thanks for the info, never occurred to me parts swapping between 23 and 18 spline gear sets was possible.
Are parts available to convert to any of these optional ratios?
AFAIK, it's not possible to swap those, because;
The helix angles are different , like the Muncie "Rock Crusher" stuff, versus regular Muncie.

But amongst the regular 23spl stuff, AFAIK, the M/S low-gear will swap amongst the three ratios I know about. And I think the m/s second might, between the 2.47 and the 2.66
But each of the three front ends are otherwise different.

Here are the only regular street ratios I know about, with 1x23 inputs; not including the od boxes.

24-29-34-35, ratios are 2.66-1.91-1.39-1.00
31-27-23-17, the standard "wide" ratio

25-29-34-35, ratios are 2.47-1.77-1.34-1.00
30-26-23-17, the T/A "close" ratio

22-27-32-35. ratios are 3.09-1.92-1.40-1.00
33-29-25-17, the Commando "deep-low" ratio

Whether or not it is possible to swap inputs, among the "coarse-angle" boxes I don't know.