-100%

Sold out

Gm-8.58.6-Inch-3.90-Ratio-Ring-And-Pinion-Nitro-Gear-And-Axle

Click to zoom in

Load image into Gallery viewer, Gm-8.58.6-Inch-3.90-Ratio-Ring-And-Pinion-Nitro-Gear-And-Axle

Nitro Gear & Axle GM8.5-390-NG GM 8.5/8.6 Inch 3.90 Ratio Ring And Pinion Nitro Gear and Axle

Name: Nitro Gear & Axle GM8.5-390-NG GM 8.5/8.6 Inch 3.90 Ratio Ring And Pinion Nitro Gear and Axle
Brand: Nitro Gear & Axle
Availability: OutOfStock

by Nitro Gear & Axle

• SKU: ds_FSJK_GM8.5-390-NG

• Product Type: Differential Ring and Pinion

2 sold in last 8 days

$396.75 $0.00

Inventory:

Guaranteed Fitment

Always the correct part

Added Value

Performance matched parts

In-House Experts

We know our products

Nationwide Delivery

Economy shipping

1 customers are viewing this product

Nitro Gear & Axle GM8.5-390-NG GM 8.5/8.6 Inch 3.90 Ratio Ring And Pinion Nitro Gear and Axle

Rock Solid Hitch

Solid hitch with serious strength and clean powder coat, heavy to lift, but installs easy and tows perfectly!!

Great Shipping

Shipping was quick and on time - exactly what I needed for my small-block build - would buy again for sure

Perfect Fit Mats

Weatherbeater mats fit my work truck perfectly. Dropped them in and nothing moves. Truly a great upgrade

Sleek Visors

Window visors look incredible and feel durable, install was simple. Zero wind noise on the highway!

Leveling Success

Leveling kit components were well packed. Instructions lacking, but online videos helped. Rides level now and feels planted.

Found Single Lifters

Found single lifter pairs in stock here when others required full sets, fast shipping got me racing again, hell yeah!!

Desert Series Bumper

Rear bumper upgrade looks better than factory plastic. Install was easy, and functionality is miles ahead. Highly recommended.

Lomax Fitment

Tonneau cover fit is excellent. Clear instructions and a smooth install. Delivery to my door was super convenient

Next Day Turbo

Turbo arrived next morning and matched description. Bolted up cleanly and truck is back to full power.

Legend Grille Guard

Husband’s birthday grille guard is rock solid, looks sharp he loves it so much!!! Thanks again

Shipping Protection Helped

Customer service handled a damaged shipment immediately. Refund was painless. I’ll shop here again.

Easy Exhaust Install

Exhaust system installed in two hours on my first try. Perfect fit and the sound is pure joy.

Do you offer wholesale or jobber pricing?

Yes. Wholesale pricing is available for legitimate businesses that provide a valid business number or equivalent proof. Ongoing purchase volume is required to maintain discount eligibility. One-time personal buyers aren’t eligible.

Will this part fit my vehicle?

If a product page clearly lists fitment for your vehicle and the description leaves no reasonable doubt, we’ll cover the cost of return if it doesn’t fit. Exclusions apply if prior modifications cause the issue. When browsing self-serve, you’re responsible for confirming compatibility by checking manufacturer fitment data and notes. If unsure, contact us before ordering and we’ll verify it for you.

Do you offer technical support or installation advice?

We help where possible on a case-by-case basis. Most manufacturers include detailed instructions and tech support contacts. Because our catalog spans hundreds of brands, we can’t provide every torque spec or procedure, but we’ll connect you with the manufacturer if needed.

Do you offer price matching?

We don’t guarantee price matching, but we’re happy to review a legitimate in-stock offer from another Canadian retailer. The comparison must include all costs such as product price, shipping, taxes, and fees, and the item must be identical and available for immediate purchase. We won’t lose money to match unsustainable or out-of-stock pricing.

Can I exchange an item?

Yes. In-store exchanges happen on the spot when stock is available. For shipped orders, the original item must be returned first. Once received and inspected, we can issue a store credit toward the correct part or replacement. We can’t send a second item while the first is still in your possession without payment for both.

Are prices shown before or after tax?

All prices on the site are before tax. GST, HST, or PST is calculated at checkout based on your shipping address..

Need Help? We've Got Answers.

Find quick solutions to the most common questions about shipping, returns, compatibility, and support.

Contact

Description_MKT	Nitro Gear and Axle strives to provide the highest quality differential components available. We take the steps necessary to ensure our parts are dependable. Our product range is continually growing to meet the needs of consumers for new ratios and applications. At Nitro we know differentials, and know what it takes to provide you with high quality components. Nitro gears are manufactured from 8620 steel gear forgings in the same manufacturing facilities as GM, Dodge, Ford and Toyota. They are precision machined using computer controlled processes, heat treated, CNC triple-lapped and Rockwell tested for hardness. These extra steps ensure excellent fitment, ideal contact pattern and smooth, quiet operation.Details:Nitro Ring and Pinion SetDifferential: GM 8.5 Inch and GM 8.6 Inch 10 BoltLocation: RearRotation: StandardGear Ratio: 3.90Tooth Count: 39/10Material: 8620 SteelPinion Spline: 30Ring Gear Bolts: 10 (Not Included)Manufacturer: Nitro Gear and AxleWarranty: 2 YearsSold As A SetTech Notes:Nitro 8.5 and 8.6 gears work on both GM 8.5 inch and GM 8.6 inch DifferentialsFor 8.5 inch use MKGM8.5For 1999-2008 8.6 inch use MKGM8.6For 2009-2014 8.6 inch use MKGM8.6-BFits Vehicles:1973-1977 Buick Regal1973-1977 Buick Apollo1973-1977 Buick Century and Buick Roadmaster1984-1987 Buick Grand National and GNX1970-1981 Chevy Camaro1973-1977 Chevy Chevelle1973-1977 Chevy Malibu1973-1977 Chevy Monte Carlo1970-1975 Chevy Nova1973-1977 Chevy El Camino1971-1996 Chevy Caprice1971-1985 Chevy Impala1994-1996 Chevy Impala SS1970-1981 Pontiac Firebird and T/A1971-1977 Pontiac Ventura1975-1995 Chevy G10 and G20 Van1996-2010 Chevy Express 1500 Van1975-1995 GMC Vandura G10 G20 Van1996-2010 GMC Savana 1500 Van1980-1987 Chevy and GMC C10 K10 Pickup1988-1998 Chevy and GMC C1500 (2wd only)1999-2010 Chevy Silverado 1500 (Not HD or 4x4)1999-2010 GMC Sierra 1500 (Not HD or 4x4)1980-1991 Chevy K5 Blazer 2wd or 4wd1980-1991 GMC K5 Jimmy 2wd or 4wd1980-1991 Chevy Suburban 1500 2wd or 4wd
Description_SHO	GM 8.5/8.6 Inch 3.90 Ratio Ring And Pinion Nitro Gear and Axle
material	8620 Steel
series
Length	5.5000
Width	11.0000
Height	15.5000
Weight	18.3000