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Yukon Gear High Performance Yukon Ring & Pinion Gear Set for GM 8.5in Olds Rear 3.90 Ratio

SKU: YUKYG_GM8.5OLDS-390

Differential Ring and Pinion

YUK Gear Sets - GM...

Yukon Gear High Performance Yukon Ring & Pinion Gear Set for GM 8.5in Olds Rear 3.90 Ratio

SKU: YUKYG_GM8.5OLDS-390

Differential Ring and Pinion

YUK Gear Sets - GM...

A$1,177.24
Available from MFR. This item is available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical order processing and release times for this part. This item is not held in our own warehouse, and actual dispatch timing may vary depending on manufacturer workload and logistics at the time of ordering.
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Description

Yukon Gear & Axle high-performance ring and pinion gear sets are the benchmark of quality in the automotive gear industry. Yukon engineers use state-of-the art design, advanced heat-treating techniques, and leading-edge quality testing processes to ensure the structure and surface finish meet exacting specifications and quality standards. Yukon offers its Y.E.S. Plan, a lifetime, comprehensive, no-questions-asked protection plan covering your gear set for as long as you own your vehicle. Whether you’ve added tons of horsepower under the hood, upgraded to bigger tires, are just want to optimize the traction performance of your ride, Yukon offers the widest selection of gear ratios on the market to accommodate every need.

Product Overview

Yukon Gear & Axle high performance ring & pinions set the standard for quality. Yukon Engineers use state-of-the art design & testing processes, backed by 2 in-house quality labs to ensure each item manufactured meets exacting specifications & quality standards. Yukon designed gear tooth surface finish reduces both friction & heat for long races & high torque conditions. We use high grade steel in both the ring & pinion, with fitment designed to OEM specs. Go ahead, add loads of horsepower & go big on tires because Yukon offers the widest selection of gear ratios to choose from. You?ll know that your gear choice was the right one, because you chose Yukon. Yukon Ring & Pinions come with a 1 year warranty against manufacture defects. Yukon offers a Y.E.S. Plan for a lifetime, comprehensive, no-questions-asked protection plan covering your gears for as long as you own the vehicle.


Features and Benefits

  • For GM 8.25 in.
  • All Yukon ring & pinion sets come standard with a one-year warranty.
  • High Performance Ring & Pinion Set
  • 3.90 ratio
  • for GM 8.5"
  • High Performance Ring Pinion Set
  • All Yukon Ring Pinion Sets Come Standard w/A One-Year Warranty

Product Details

AAP Selling Package Quantity UOM:EA
AAP_UDA_12:EA
AAP_UDA_22:1
Axle Model:GM 8.5
Axle Type:Semi Float
California Proposition 65:Not Applicable
Cover Bolt Quantity:12
Description:High performance Yukon Ring/Pinion gear set for GM 8.5in. OLDS rear; 3.90 ratio
Differential:GM 8.5 Rear for Oldsmobile 442 and Cutlas, 31 spline
Gear Ratio:3.9
Mounting Hardware Included:No
Part Number:yukYG GM8.5OLDS-390
Pinion Spline Count:30
Position:Rear
Ring Gear Bolt Quantity:10
Ring Gear Outside Diameter:8.5
Shims Included:No
Title:High performance Yukon Ring & Pinion gear set for GM 8.5" OLDS rear, 3.90 ratio
WARNING CA Proposition 65 Required:No
WARNING CA Proposition 65:No

Application Summary

8.5" OLDS GM 3.90 R&P, FITS 2.93-3.23 CASE

Part Type

Differential Ring and Pinion

Data: v4.2 - Upd: 2026-10-14 20:40:27

Features

  • 3.90 ratio
  • All Yukon ring & pinion sets come standard with a one-year warranty.
  • All Yukon Ring Pinion Sets Come Standard w/A One-Year Warranty
  • For GM 8.25 in.
  • for GM 8.5"
  • High Performance Ring & Pinion Set
  • High Performance Ring Pinion Set

Specifications

AAP Selling Package Quantity UOM:
EA
AAP_UDA_12:
EA
AAP_UDA_22:
1
Axle Model:
GM 8.5
Axle Type:
Semi Float
California Proposition 65:
Not Applicable
Cover Bolt Quantity:
12
Description:
High performance Yukon Ring/Pinion gear set for GM 8.5in. OLDS rear; 3.90 ratio
Differential:
GM 8.5 Rear for Oldsmobile 442 and Cutlas, 31 spline
Gear Ratio:
3.9
Mounting Hardware Included:
No
Part Number:
yukYG GM8.5OLDS-390
Pinion Spline Count:
30
Position:
Rear
Ring Gear Bolt Quantity:
10
Ring Gear Outside Diameter:
8.5
Shims Included:
No
Title:
High performance Yukon Ring & Pinion gear set for GM 8.5" OLDS rear, 3.90 ratio
WARNING CA Proposition 65 Required:
No
WARNING CA Proposition 65:
No

Reference Information

Brand Name/s Yukon Gear & Axle
StreetFX SKU yukYG_GM8.5OLDS-390
SFX Item ID 4491847
Supplier Item Code 4491847
Manufacturer SKU YG GM8.5OLDS-390
Manufacturer UPC 883584246886
Alternative References gm8.5olds-390, 8.5in

Compatibility

8.5" OLDS GM 3.90 R&P, FITS 2.93-3.23 CASE

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