Motive Gear C887391E Differential Ring & Pinion, For Chrysler 8.75" Gear Ratio 3.91, 12-Bolt 10 Spline 11 Pinion & 43 Ring Tooth - Fits Chrysler/Dodge/Plymouth, Replaces 69-0375-1, Yukon YG C8.42-390

Short Summary: The Motive Gear C887391E Ring and Pinion Gear Set delivers a 3.91 gear ratio for Chrysler 8.75" (742 case) rear differentials. Designed for vintage Mopar muscle and classic street machines, it’s a direct-fit solution for performance or restoration applications. Key FeaturesGear Ratio: 3.91Differential Model: Chrysler 8.75" (742 Housing)Ring Gear OD: 8.75 InchesRing Gear Tooth Count: 43Pinion Gear Tooth Count: 11Pinion Shaft Diameter: 1.75 InchesPinion Spline Count: 10 (Verify before ordering)Ring Gear Bolt Quantity: 12Material: 8620 SteelRotation: StandardWarranty: 2 Years or 100,000 MilesVehicle CompatibilityChrysler1957–1968 300, Imperial, New Yorker, Newport, Town & CountryDodge1967–1968 A1001966–1970 Charger1965–1970 Coronet1963–1968 D100 Pickup Series1968 Dart1965–1970 Monaco1964, 1967–1968 P100, P200, P300 Vans1962–1970 PolaraPlymouth1968 Barracuda1962–1970 Fury, Fury I, II, III1967–1970 GTX1968–1970 Road Runner1965–1970 Satellite1968 Valiant1967 VIPReplaces OEM & Aftermarket Part NumbersYukon Gear & Axle: 24009, YG C8.42-390Richmond Gear: 69-0375-1, 690375-1Nitro Gear & Axle: C8.42-390-NGWarranty & Quality Assurance Motive Gear backs this gear set with a 2-Year or 100,000-Mile Warranty. Crafted from premium 8620 steel and engineered for classic Mopar rear axles, it ensures quiet operation, excellent load handling, and long-lasting performance on the street or strip.

• Motive Gear 3.91 ratio performance ring and pinion gear set for Chrysler 8.75" 742-case rear ends; built for muscle cars and vintage Mopar applications.
• Gear Specs: 3.91 Ratio | Ring OD: 8.75" | Ring Teeth: 43 | Pinion Teeth: 11 | Pinion Spline: 10 | Shaft Dia: 1.75" | Material: 8620 Steel | Standard Rotation.
• Direct fit for 742-case dropout-style axles in Dodge, Plymouth, and Chrysler models; verify pinion spline count before ordering.
• Ideal for high-performance street builds and vintage restoration; precision-cut and heat-treated for strength and durability.
• Includes 1x Ring Gear & 1x Pinion Gear. Backed by a 2-Year / 100,000-Mile Warranty. Proposition 65 compliant.