The Motive Gear Performance Ring and Pinion Set 490084-1 is designed for compatible GM 12-bolt passenger-car differentials, offering a 3.90:1 final drive ratio for performance-oriented street cars and classic American vehicle builds.
A shorter 3.90:1 gear ratio can provide stronger acceleration and improved response compared with a taller ratio, making this set a popular choice for performance upgrades and restoration projects. It is suitable for applications where the existing differential specification and intended driving use match the gear ratio.
£395.00
Only 1 left in stock
UK delivery £13.60 · Dispatched from Essex
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The Motive Gear Performance Ring and Pinion Set 490084-1 is designed for compatible GM 12-bolt passenger-car differentials, offering a 3.90:1 final drive ratio for performance-oriented street cars and classic American vehicle builds.
A shorter 3.90:1 gear ratio can provide stronger acceleration and improved response compared with a taller ratio, making this set a popular choice for performance upgrades and restoration projects. It is suitable for applications where the existing differential specification and intended driving use match the gear ratio.
Designed for compatible GM 8.875-inch (12-bolt) passenger-car differentials. Confirm the axle and differential specification before ordering, as not all GM 12-bolt axles use the same ring and pinion gears.
A 3.90:1 ratio can increase engine RPM at cruising speeds compared with a numerically lower ratio. Check compatibility with your differential, intended use and transmission before installation. Professional setup is recommended to ensure correct gear backlash, contact pattern and bearing preload.
With decades of experience supplying American vehicle parts to UK enthusiasts, Customville American stocks quality restoration and performance components locally, helping you keep your classic American vehicle in top condition.
