[Mark66]

I own a 1966 Pontiac GP with an original standard differential rear axle. I also have an original 1966 Pontiac GP safe-t-track differential rear axle. I would like to swap the safe-t-track differential into the GP rear axle and ideally do so without removing the rear axle from the GP. Both differentials are in good working order.

The 1966 Pontiac Chassis Shop Manual states "The Safe-T-Track differential is similar to and interchangeable with the standard differential case assembly (the ring gear and side bearings are identical)".

From a practical standpoint are there any issues of which I should be aware before attempting to swap the differentials? I could of course simply swap the rear axles but would prefer not to do so unless there are good reasons.

Axle ratio not an issue for this swap.