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Yukon Gear & Axle Ring and Pinion Sets YG GM12P-390 Gears, 3.90:1 Ratio, Standard Rotation, GM 8.875 in. Passenger Car, Set

SKU: YUKGM12P-390

Ring and Pinion Gears

Yukon Gear & Axle Ring and Pinion Sets YG GM12P-390 Gears, 3.90:1 Ratio, Standard Rotation, GM 8.875 in. Passenger Car, Set

SKU: YUKGM12P-390

Ring and Pinion Gears

Sale ends in Calculating...

A$1,327.36 A$1,405.62
IN STOCK! Est Ship 4-7 days. In stock at 1 location (more than 10 available)

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Description

Exclusive Yukon Gear & Axle flash sale discount at StreetFX!

Talk about timing! This is a limited offer while stocks last on various Yukon Gear & Axle part numbers. There's never been a better time to buy your Yukon Gear & Axle upgrades, so what are you waiting for?!

This item is currently on sale!

Same-day payment required to secure promotional price. Promotions may end early or be extended based on stock levels or other factors.

Data: v2 - Desc: v4.2 - Upd: 2026-11-08 20:23:24

Data: v4.2 - Upd: 2026-11-10 23:12:30

Features

Note on Vehicle Configuration

This listing includes the term "driver" or "passenger". Please note that this may refer to a region specific variation based on vehicle configuration (LHD/RHD) or regional preferences. Much of our database relates to US sourced products where "Driver" typically refers to the left-hand side in LHD vehicles, and "passenger" to the right. In RHD vehicles, this terminology is reversed. Review product details carefully for compatibility. Contact support if you have any questions. StreetFX may not accept returns for special order products.

(keyword: passenger)

Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

(keyword: ring)

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Yukon Gear & Axle, YUKON GEAR AND AXLE, Yukon Gear And Axle (randys)
StreetFX SKU yukGM12P-390
SFX Item ID 4787116
Accounting SKU yuk-GM12P-390
Manufacturer SKU GM12P-390
Manufacturer UPC 883584241256
Alternative References YGA-24125

Ring and Pinion Gears, 3.90:1 Ratio, Standard Gear Rotation, GM 8.875 in. Passenger Car, Set

Yukon Gear & Axle ring and pinion sets are strong but quiet performers. Designed to handle some of the harshest conditions, these sets utilize the latest design and manufacturing technologies to afford you a smooth running gear that's durable and easy to set up. Yukon ring and pinions are available in hundreds of size, ratio, and axle model options. Whether you're on the street, off-road, or at the track, you'll experience unrivaled power and gear performance. Order the model recommended for your application.

Product Attributes
BrandYukon Gear & Axle
Manufacturer's Part NumberYG GM12P-390
Part TypeRing and Pinion Gears
Product LineYukon Gear & Axle Ring and Pinion Sets
UPC883584241256
Differential Case Design TypeGM 8.875 in. (12-bolt), passenger car
Ring and Pinion Ratio3.90:1
Cover Bolts12
Ring Gear Bolts12
Pinion Spline Count30
Carrier Series4
Ring Gear RotationStandard
Ring Gear Teeth39
Pinion Gear Teeth10
Ring Gear Diameter (in.)8.875 in.
Pinion Shaft Diameter (in.)1.625 in.
Installation Kit IncludedNo
Cover Gasket IncludedNo
Pinion Shims IncludedNo
Carrier Shims IncludedNo
Crush Sleeve IncludedNo
Pinion Seal IncludedNo
Pinion Nut IncludedNo
Ring Gear Bolts IncludedNo
Head Bearing IncludedNo
Tail Bearing IncludedNo
Carrier Bearings IncludedNo
Axle Seals IncludedNo
Axle Bearings IncludedNo
Differential Cover IncludedNo
Differential Oil IncludedNo
Friction Modifier IncludedNo
Installation DVD IncludedNo
QuantitySold as a set.
NotesThin cut gear fits 4:10:1 and numerically higher series 4 carriers.

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