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The Yukon USA Standard 8.5‑inch GM ring and pinion set in a 5.38:1 ratio supplies a direct replacement gearset, but requires a notched X/P for installation. It fits GM 8.5‑ and 8.6‑inch axles with an 8.50‑inch ring gear diameter, 10 ring‑gear bolts and a 30‑spline pinion. Yukon states these sets exceed OEM specs and are inspected through rigorous in‑house dimensional, material and fitment testing.
USA Standard 8.5in GM 5.38 Ring & Pinion (Needs Notched X/P)
