USA Standard Gear

AMC Model 20 4.88 Ring and Pinion Gear Set

$222.09

SKU: ZG M20-488

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The USA Standard Gear ZG M20-488 ring and pinion set is engineered for reliability and precision in drivetrain applications, specifically for the AMC Model 20 axle. This set is a robust choice for classic American muscle cars and off-road vehicles, promising enhanced performance and durability. Key specifications include an 8.875-inch ring gear diameter, 28 pinion splines, and 8 ring gear bolts. The 4.88 gear ratio is designed to strike an optimal balance between street drivability and off-road capability, improving acceleration and throttle response without compromising highway performance. The ZG M20-488 is compatible with a range of American Motors vehicles, including the AMX (1968-1970), Concord (1978-1979), Hornet (1970-1977), Javelin (1968-1974), Matador (1971-1978), and Pacer (1975-1980). It also fits Hummer H1 models (2002-2004 & 2006) and various Jeep models such as the CJ5 (1976-1983), CJ7 (1976-1986), J10 (1976-1986), Scrambler (1981-1986), and Wagoneer (1979-1986).

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandUSA Standard Gear
Part NumberZG M20-488
CategoryDrivetrain

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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