Nearly 30 years of obsessively cataloging, photographing, and taking video of each part means it will fit your 1975 Buick Riviera USA Standard Ring and Pinion Gear Set - GM 8.5" - 3.42 Ratio - Rear Differential Ring and Pinion Set.

Period. No Hassle. GUARANTEED.

We cover round trip shipping if we make a mistake.

Check out the video below to view the Guaranteed Exact Fit process from start to finish!