# USA Standard Gear ZGC8.0-390 Ring and Pinion Set, 3.90 Ratio

USA Standard Gear ZGC8.0-390 is a standard-rotation ring and pinion set listed for a Chrysler 8-inch differential with a 3.90 axle ratio. Confirm the differential and axle application before ordering, since fitment depends on the specific vehicle setup.

- [Original product page](https://best-deals.pro/product/usa-standard-gear-zgc8-0-390-ring-pinion-set)
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- Market: US
- Language: en-US
- Currency: USD
- Brand: USA Standard Gear
- Model: ZGC8.0-390
- Category: Cars & Motorcycles > Auto Parts & Maintenance > Mechanical Parts
- Price: 219.90 USD
- Previous price: 532.89 USD
- Discount: 59%
- Price checked: 2026-11-14T05:36:12.835Z

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Listed for a Chrysler 8-inch differential and 3.90 axle ratio.
- Described by the manufacturer as a standard-rotation gear set.
- Manufacturer states a standard one-year warranty against defects on its ring and pinion sets.

## Pros

- The specified differential application and 3.90 ratio make it straightforward to screen against a matching axle setup.
- Standard rotation is stated in the listing, helping buyers compare it with their required gear configuration.

## Specifications

### Identity and application
- Brand: USA Standard Gear
- Model: ZGC8.0-390
- Differential application: Chrysler 8"
- Axle ratio: 3.90
- Rotation: standard rotation
### Dimensions and installation
- Dimensions listed: 12 x 13 x 3 inches
- Weight listed: 12.9 pounds

## Before you buy

- Confirm that the vehicle has the Chrysler 8-inch differential and requires a 3.90 ratio and standard rotation. The listed dimensions and weight describe the item, not a fitment guarantee.

## A good fit for

- Buyers replacing gears in a confirmed Chrysler 8-inch differential that requires a 3.90 axle ratio and standard rotation.
- Installers who have verified the axle application and gear configuration before ordering.

## Less suited to

- Buyers whose differential type, required ratio, or rotation has not been confirmed.
- Applications requiring a different differential or axle ratio.

## Frequently asked questions

### What differential is this gear set listed for?
The listing specifies a Chrysler 8-inch differential. Confirm the exact axle application before buying.
### What axle ratio does this set provide?
The listing identifies a 3.90 axle ratio.
### Is this a standard-rotation set?
Yes. The listing describes it as a standard-rotation ring and pinion set.
### What warranty is stated?
The manufacturer says its ring and pinion sets have a standard one-year warranty against defects. Check the warranty terms for this specific purchase.

## Alternative options

- [USA Standard Gear \(ZG F9-325\) Ring & Pinion Gear Set for Ford 9 Differential](https://best-deals.pro/visit/usa-standard-gear-zgc8-0-390-ring-pinion-set)
- [USA Standard Gear \(ZG F8-355\) Ring and Pinion Gear Set for Ford 8" Differential](https://best-deals.pro/visit/usa-standard-gear-zgc8-0-390-ring-pinion-set)
- [USA Standard Gear \(ZG GM8.5-373\) Ring & Pinion Gear Set for GM 8.5 Differential](https://best-deals.pro/visit/usa-standard-gear-zgc8-0-390-ring-pinion-set)
- [USA Standard Gear \(ZG C8.41-373\) Ring & Pinion Gear Set for Chrysler 8.75 Differential 41-Case Housing](https://best-deals.pro/visit/usa-standard-gear-zgc8-0-390-ring-pinion-set)

## Images

![USA Standard Gear ZGC8.0-390 Ring and Pinion Set, 3.90 Ratio — 1](https://best-deals.pro/i/R1IbMHKomA2L853hOEMnutZVNz9gFrokgWd2cEYA3ZcbKvh6rH0Nn578ui56JMYseE_TZOl5t3UIlFt62E6NUR35XboJMwBvXS8XaP3L8eWdQH-f3NTeD9E2.jpg)