Can you use a Buick rear axle in a Pontiac?

In general, using a Buick rear axle in a Pontiac is possible if both vehicles share the same platform and have compatible specifications, such as axle width, gear ratiOS, and mounting points. However, modifications may be necessary to ensure proper fitment and function. It's important to consult both vehicles' service manuals or a knowledgeable mechanic to determine compatibility before proceeding with the swap.