Short Summary: The C887391E Ring and Pinion Gear Set from Motive Gear delivers a gear ratio of 3.91 for Chrysler 8.75" (742 case) rear differentials.
It’s designed for vintage Mopar muscle and classic street machines, serving as a direct-fit solution for restoration or performance applications.
Key Features Gear Ratio: 3.91 Differential Model: Chrysler 8.75" (742 Housing) Ring Gear OD: 8.75 Inches Ring Gear Tooth Count: 43 Pinion Gear Tooth Count: 11 Pinion Shaft Diameter: 1.75 Inches Pinion Spline Count: 10 (Verify before ordering) Ring Gear Bolt Quantity: 12 Material: 8620 Steel Rotation: Standard Warranty: 2 Years or 100,000 Miles Vehicle Compatibility Chrysler 1957–1968 300, Imperial, New Yorker, Newport, Town & Country Dodge 1967–1968 A100 1966–1970 Charger 1965–1970 Coronet 1963–1968 D100 Pickup Series 1968 Dart 1965–1970 Monaco 1964, 1967–1968 P100, P200, P300 Vans 1962–1970 Polara Plymouth 1968 Barracuda 1962–1970 Fury, Fury I, II, III 1967–1970 GTX 1968–1970 Road Runner 1965–1970 Satellite 1968 Valiant 1967 VIP Replaces OEM & Aftermarket Part Numbers Yukon Gear & Axle: 24009, YG C8.42-390 Richmond Gear: 69-0375-1, 690375-1 Nitro Gear & Axle: C8.42-390-NG Warranty & Quality Assurance Motive Gear backs this gear set with a Warranty of 2 Years or 100,000 Miles.
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.
