Does 1969 Buick Riviera have positraction?

The 1969 Buick Riviera could be equipped with a positraction rear axle, which was an optional feature at the time. Positraction, or limited-slip differential, helps provide better traction by distributing power to both rear wheels, especially during slippery conditions. If a specific vehicle has this feature, it would typically be indicated on the build sheet or by examining the rear axle assembly.