The Yukon crush sleeve for 1966‑1979 Corvette (fine spline) is a dedicated replacement sleeve for 30‑spline pinions in late‑60s to late‑70s Corvette applications. It is approximately 2.450 inches long and intended to restore proper pinion spacing during differential service. Yukon supplies this as part of its small parts range for ring gear bolts, pinion nuts and related differential hardware.
Yukon Gear 66+ Ci Corvette Crush Sleeve / (Fine Spline)