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The 8 Best automotive differential ring and pinions of 2025

Are you trying to find automotive differential ring and pinions among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!

We investigated and evaluated a number of the top-selling automotive differential ring and pinions on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 25 hours of research and did 96 automotive differential ring and pinions tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!

An overview of our top picks

Table of contents

The best automotive differential ring and pinions you can buy today

SaleNo. 1
USA Standard Gear (ZG GM8.5-373) Ring & Pinion Gear Set for GM 8.5 Differential
  • USA Standard ring and pinion sets are the right choice to add confidence to your install
  • USA Standard Gear offers a full line of ring and pinion sets for a variety of common and hard to find applications
  • USA standard gear offers a standard one year against defects on their ring and pinion sets
  • This product is used in a 3. 73 axle ratio
  • 12 Ring Gear Bolts
SaleNo. 2
Motive Gear GM10-342A Differential Ring and Pinion Fits GM 8.5|GM 8.625", 3.42 Ratio
  • PERFECT FIT: Rotation: Standard; Ring Gear Outside Diameter: 8.5"; Ratio: 3.42; Pinion Gear Tooth Quantity: 12; Ring Gear Tooth Quantity: 41 **Please Note: Before purchasing, verify correct fitment for your specific vehicle application using the Amazon Confirmed Fit tool**
  • UNLEASH YOUR BEAST: Motive Gear Ring and Pinion sets are engineered for the toughest conditions, giving your differential the power and durability it needs to dominate the road, track, or trail.
  • UNRIVALED PERFORMANCE: Whether you're burning rubber on the street, conquering off-road terrain, or setting records at the track, Motive Gear ring and pinion sets deliver the high-performance, optimal spline count, and quality that serious gearheads demand.
  • CUTTING-EDGE DESIGN: Motive Gear uses the latest designs and manufacturing technologies to create gears that run quietly, with precise rotation and a strong diameter, making setup a breeze so you can spend less time in the garage and more time behind the wheel.
  • BUILT TO LAST: Every Motive Gear ring and pinion set comes with a standard one-year warranty, ensuring your vehicle is ready to roll with confidence.
SaleNo. 3
Yukon Gear & Axle (YG GM8.5-456) High Performance Ring & Pinion Gear Set for GM 8.5/8.6 Differential
  • Yukon Ring and Pinion sets give you the confidence of knowing you’re running gears designed for the harshest of conditions
  • Whether it’s on the street, off-road, or at the track; Yukon ring and pinion sets deliver unrivaled performance and quality
  • Yukon uses the latest designs and manufacturing technologies to provide a quiet running gear that is strong and easy to set up
  • All Yukon ring and pinion sets come standard with a one-year warranty
  • This gear set does have an ABS provision on the pinion; This product is used in a 4.56 ratio
  • Fits GM 8.5" and 8.6"
  • 8.50" Ring Gear Diameter
  • 30 Spline Pinion
  • 10 Ring Gear Bolts
  • 4.56 ratio
  • Fit type: Vehicle Specific
SaleNo. 4
Motive Gear GM10-373A Differential Ring & Pinion Set, 3.73 Ratio, 30-Spline, 10-Bolt, Fits GM 8.5"/8.625", Compatible for Chevrolet, GMC, Cadillac, Buick, Pontiac, Oldsmobile, Hummer, Isuzu Models
  • ✅ Motive Gear 3.73 Ring & Pinion – Precision-engineered for GM 8.5"/8.625" 10-bolt differentials, offering enhanced torque, strength & performance for smooth operation in daily & performance vehicles.
  • ✅ Premium 8620 Steel Construction – Built for extreme durability, heat-treated for wear resistance & longevity, ensuring reliable performance under heavy loads & challenging driving conditions.
  • ✅ OE Direct Fit & Simple Installation – Designed for a seamless fit, works with 2.73+ carrier ratios, replacing OE parts with precision machining for factory-like performance & hassle-free installation.
  • ✅ Compatible with GM Vehicles (1970-2020) – Fits Chevrolet, GMC, Cadillac, Buick, Pontiac & Oldsmobile models, including Silverado, Tahoe, Yukon, Escalade, Camaro, Impala & more—verify fitment details.
  • ✅ Replaces GM 26037712, 26066706, Richmond Gear 49-0041-1, Dorman 697-301, Motive Gear GM10-373, EXCEL from Richmond GM85373.
SaleNo. 5
Motive Gear T9-529 Differential Ring and Pinion Fits Toyota 9.0" Reverse, 5.29 Ratio
  • PERFECT FIT: Rotation: Reverse; Ring Gear Outside Diameter: 9"; Ratio: 5.29; Pinion Gear Tooth Quantity: 7; Ring Gear Tooth Quantity: 37 **Please Note: Before purchasing, verify correct fitment for your specific vehicle application using the Amazon Confirmed Fit tool**
  • UNLEASH YOUR BEAST: Motive Gear Ring and Pinion sets are engineered for the toughest conditions, giving your differential the power and durability it needs to dominate the road, track, or trail.
  • UNRIVALED PERFORMANCE: Whether you're burning rubber on the street, conquering off-road terrain, or setting records at the track, Motive Gear ring and pinion sets deliver the high-performance, optimal spline count, and quality that serious gearheads demand.
  • CUTTING-EDGE DESIGN: Motive Gear uses the latest designs and manufacturing technologies to create gears that run quietly, with precise rotation and a strong diameter, making setup a breeze so you can spend less time in the garage and more time behind the wheel.
  • BUILT TO LAST: Every Motive Gear ring and pinion set comes with a standard one-year warranty, ensuring your vehicle is ready to roll with confidence.
SaleNo. 6
Motive Gear T10.5-529, Differential Ring & Pinion, For Toyota 10.5", Gear Ratio: 5.29, 12-Bolt, 34 Spline, 7 Pinion & 37 Ring Tooth - Fits 2007–2020 Toyota Tundra, Replaces: T10.5-529-NG, T105529.
  • Precision-engineered 5.29 gear ratio for Toyota 10.5" axles; designed for high torque loads and improved off-road or towing performance.
  • Features 7 pinion teeth, 37 ring gear teeth, 1.76" pinion shaft diameter, and 34-spline pinion for dependable strength and durability.
  • Manufactured from premium 8620 steel for superior wear resistance and quiet operation under extreme conditions.
  • Includes one ring gear and one pinion gear; fits rear differentials with 12 ring gear bolts and 12 cover bolts.
  • Compatible with Toyota Tundra (2007–2020); replaces Nitro Gear & Axle T10.5-529-NG and EXCEL from Richmond T105529.
SaleNo. 7
USA Standard Master Overhaul kit for '09 & Down Ford 8.8" Differential.
  • Uses High Quality Koyo Bearings and Races;Material:Alloy Steel,Rubber,gasket material,marking compound,threadlocker
  • Complete Installation Kit
  • This kit uses Koyo bearings and races
  • Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush sleeve (if applicable), oil baffles and slingers (if applicable)
SaleNo. 8
Motive Gear GM7.5-373A Differential Ring & Pinion Set 3.73 Ratio, 27 Spline, fit GM 7.5" 7.625" 10 Bolt, 8620 Steel, Compatible for Chevrolet, GMC, Buick, Cadillac, Isuzu, Oldsmobile, Hummer
  • ✅ High-Performance Gear Set – 3.73 ratio ring & pinion set for GM 7.5"/7.625" (10-bolt) axles, crafted from premium 8620 steel for strength & longevity.
  • ✅ Precision Engineered – Features a 41-tooth ring gear, 11-tooth pinion gear, 27-spline pinion shaft, ensuring optimal efficiency & durability.
  • ✅ Direct OE Replacement – Designed for vehicles with 3.23 & numerically higher ratio carriers; easy installation for a perfect factory fit.
  • ✅ Wide Compatibility – Fits Chevrolet, GMC, Buick, Cadillac, Isuzu, Oldsmobile, Hummer models from 1973-2013 (see full list below).
  • ✅ 1-Year or 50,000 Mile Warranty – Backed by Motive Gear’s industry-leading warranty for reliable, long-lasting performance.
SaleNo. 9
Motive Gear GM10-342A Differential Ring & Pinion Set, GM 8.5"/8.625", 3.42 Ratio, 30-Spline, 10-Bolt, Fits Silverado 1500, Tahoe, Suburban, Blazer, Sierra 1500, Yukon, Escalade, Replaces-GM 15588323
  • ✅ Performance Upgrade: 3.42 gear ratio enhances acceleration & fuel efficiency for GM 8.5"/8.625" 10-bolt differentials.
  • ✅ Heavy-Duty 8620 Steel: Precision-cut gears provide superior durability & quiet operation for long-lasting performance.
  • ✅ Optimized Fitment: 30-spline pinion, 10-bolt ring gear, 8.5"/8.625" diameter, requires a 3.42+ carrier.
  • ✅ Ideal for Daily Driving & Towing: Balances power, fuel economy & load capacity for street & off-road applications.
  • ✅ Reliable Warranty: Backed by a 1-year / 50,000-mile warranty for guaranteed performance & dependability.
SaleNo. 10
Motive Gear F8.8-456A Differential Ring & Pinion 4.56 Ratio Ford 8.8" Rear, 10-Bolt, 30-Spline, 8620 Steel, Compatible for Ford F-150, Mustang, Explorer, Ranger, Lincoln Town, Mercury Grand Marquis
  • ✅ 4.56 Ratio Ring & Pinion for Ford 8.8" Rear – Designed for 10-bolt differentials, ensuring precise gear engagement, smooth operation, and enhanced durability for daily driving and heavy-duty applications.
  • ✅ Premium 8620 Steel Construction – Built for maximum strength and wear resistance, ensuring long-lasting durability and smooth performance under high-stress conditions.
  • ✅ 30-Spline Pinion with 10-Bolt Design – Engineered for direct OEM replacement, ensuring easy installation, proper fit, and efficient power transfer to the drivetrain.
  • ✅ Ideal for Performance & Towing – Enhances acceleration and torque efficiency, making it perfect for street, off-road, towing, and high-performance applications.
  • ✅ Fits Ford, Lincoln, Mercury, Mazda Applications – Compatible with F-150, Mustang, Explorer, Ranger, Lincoln Town Car, Mercury Grand Marquis, Mazda B-Series, replacing OEM part numbers for easy fitment.
SaleNo. 11
Motive Gear F8.8-410A Differential Ring & Pinion 4.10 Ratio Ford 8.8" Rear, 10-Bolt, 30-Spline, 8620 Steel, Compatible for Ford F-150, Mustang, Explorer, Ranger, Lincoln Town, Mercury Grand Marquis
  • ✅ 4.10 Ratio Ring & Pinion for Ford 8.8" Rear – Designed for 10-bolt differentials, ensuring precise gear engagement, smooth operation, and enhanced durability for daily driving and heavy-duty applications.
  • ✅ Premium 8620 Steel Construction – Built for maximum strength and wear resistance, ensuring long-lasting durability and smooth performance under high-stress conditions.
  • ✅ 30-Spline Pinion with 10-Bolt Design – Engineered for direct OEM replacement, ensuring easy installation, proper fit, and efficient power transfer to the drivetrain.
  • ✅ Ideal for Performance & Towing – Improves torque efficiency, acceleration, and fuel economy, making it perfect for street, off-road, towing, and high-performance vehicles.
  • ✅ Fits Ford, Lincoln, Mercury, Mazda Applications – Compatible with F-150, Mustang, Explorer, Ranger, Lincoln Town Car, Mercury Grand Marquis, Mazda B-Series, replacing OEM part numbers for easy fitment.
SaleNo. 12
Motive Gear F8.8-373A Differential Ring & Pinion Set, 3.73 Ratio, 30-Spline, 10-Bolt, Fits Ford 8.8", Compatible for Ford - Explorer/E-150/F-250/Mustang/Ranger/Thunderbird, Lincoln, Mazda, Mercury
  • ✅ Motive Gear 3.73 Ring & Pinion – Precision-engineered for Ford 8.8" 10-bolt differentials, enhancing torque, strength & performance for smooth operation in daily & performance vehicles.
  • ✅ Premium 8620 Steel Construction – Built for extreme durability, heat-treated for wear resistance & longevity, ensuring reliable performance under heavy loads & challenging conditions.
  • ✅ OE Direct Fit & Simple Installation – Designed for a seamless fit, replaces OE parts with precision machining for factory-like performance & hassle-free installation.
  • ✅ Compatible with Ford & More (1980-2020) – Fits Ford, Lincoln, Mazda & Mercury models, including F-150, Mustang, Crown Victoria, Ranger, Explorer & more—verify fitment details.
  • ✅ Replaces Richmond Gear 49-0104-1, Motive Gear F8.8-373, EXCEL from Richmond F88373, Motive Gear F888373.
SaleNo. 13
Motive Gear GM10-456A Differential Ring & Pinion Set, 4.56 Ratio, 30-Spline, 10-Bolt, Fits GM 8.5"/8.625", Compatible for Chevrolet, GMC, Cadillac, Buick, Pontiac, Oldsmobile, Hummer, Isuzu model
  • ✅ Motive Gear 4.56 Ring & Pinion – Precision-engineered for GM 8.5"/8.625" 10-bolt differentials, delivering increased torque, strength & smooth performance for daily & high-performance vehicles.
  • ✅ Premium 8620 Steel Construction – Heat-treated for exceptional durability, wear resistance & longevity, ensuring reliability under heavy loads & extreme conditions.
  • ✅ OE Direct Fit & Simple Installation – Designed for a seamless fit, works with 2.73+ carrier ratios, replaces OE components with precision machining for factory-like performance & easy installation.
  • ✅ Compatible with GM Vehicles (1970-2020) – Fits Chevrolet, GMC, Cadillac, Buick, Pontiac & Oldsmobile models, including Silverado, Tahoe, Yukon, Escalade, Camaro, Impala & more—verify fitment details.
  • ✅ Replaces American Axle 40028640, Richmond Gear 69-0167-1, Motive Gear GM10-456, EXCEL from Richmond GM85456.
SaleNo. 14
Motive Gear F8.8-355A Differential Ring & Pinion Set, 3.55 Ratio, 30-Spline, 10-Bolt, Fits Ford 8.8", Compatible for Ford-Thunderbird, Mustang, Ranger, E-150, Explorer, Lincoln, Mazda, Mercury Capri
  • ✅ Motive Gear 3.55 Ring & Pinion – Precision-engineered for Ford 8.8" 10-bolt differentials, enhancing torque, strength & performance for smooth operation in daily & performance vehicles.
  • ✅ Premium 8620 Steel Construction – Built for extreme durability, heat-treated for wear resistance & longevity, ensuring reliable performance under heavy loads & challenging conditions.
  • ✅ OE Direct Fit & Simple Installation – Designed for a seamless fit, replaces OE parts with precision machining for factory-like performance & hassle-free installation.
  • ✅ Compatible with Ford & More (1980-2020) – Fits Ford, Lincoln, Mazda & Mercury models, including F-150, Mustang, Crown Victoria, Ranger, Explorer & more—verify fitment details.
  • ✅ Replaces Richmond Gear 49-0103-1, Motive Gear F8.8-355, EXCEL from Richmond F88355, Motive Gear F888355.
SaleNo. 15
Motive Gear GM10-342 Differential Ring and Pinion 3.42 Ratio for GM 8.5" 8.6" Fits Chevrolet, GMC, Cadillac, Pontiac, Buick, Isuzu Models | Replaces GM 12471279, 23114028, Yukon YG GM8.5-342
  • ✅ Premium Quality & Performance – Manufactured for durability, Motive Gear 3.42 ratio ring & pinion set delivers smooth, quiet operation with high-strength construction for extended lifespan.
  • ✅ Precision Fit for GM 8.5" & 8.6" Differentials – Direct replacement for Chevrolet Silverado 1500, Tahoe, GMC Sierra 1500, Yukon, Cadillac Escalade, Isuzu Ascender & more (full list below).
  • ✅ OEM Replacement & Interchangeable – Replaces GM 12471279, 23114028, Yukon Gear YG GM8.5-342, Richmond Gear 49-0278-1, and more; ensures exact compatibility with factory differential gears.
  • ✅ Engineered for High Performance – Ideal for off-road, towing, and daily driving, this differential gear set offers enhanced torque distribution, efficient power transfer, and optimal traction.
  • ✅ Reliable & Backed by Warranty – Built to OE standards with precision machining and quality materials; backed by Motive Gear's industry-leading warranty for confidence in performance.
No. 16
Differentials: Identification, Restoration & Repair
80 Consomer Reviews
Differentials: Identification, Restoration & Repair
  • Jim Allen (Author)
  • English (Publication Language)
  • 378 Pages - 05/05/2025 (Publication Date) - Ring & Pinion Services (Publisher)
No. 17
Motive Gear D44-373 Differential Ring & Pinion Set 26 Spline 10-Bolt for Ratio 3.73 Fits Dana 44 Standard & ICA, Compatible for Jeep Wrangler, Chevy, Dodge Ram, Ford Bronco, Replaces Spicer, Yukon
  • ✅ Dana 44 3.73 Ring & Pinion Set – Precision-engineered for smooth torque transfer, durability & improved performance in Dana 44 Standard & ICA differentials.
  • ✅ Premium 8620 Steel Construction – Heat-treated for extreme strength, wear resistance & longevity under demanding conditions.
  • ✅ Direct OE Replacement & Easy Install – Ensures factory fitment, minimal noise, and reliable operation for various 4x4 and off-road applications.
  • ✅ Compatible with Jeep, Chevy, Dodge, Ford & More – Fits Wrangler, Blazer, Ram, Bronco, and other models (see full list).
  • ✅ Replaces Spicer 22736X, Yukon YG D44-373 & More – Backed by a 1-year/50,000-mile warranty for confidence in quality and performance.
No. 18
Dorman 697-719 Rear Differential Ring and Pinion Compatible with Select Models
  • Direct replacement - this ring and pinion set matches the fit and function of the original components on certain vehicle applications
  • Effective fix - eliminates grinding and whining from failed original bearings
  • Thoroughly tested - vehicle try-on testing and rigorous quality control measures ensure longevity
  • Trustworthy quality - backed by team of designers and engineers in the United States
  • Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool
SaleNo. 19
Motive Gear Differential Ring & Pinion Set, GM 7.5"/7.625" IFS, 4.10 Ratio, 27-Spline, 10-Bolt, Compatible with Camaro, S10, Blazer, Astro, Colorado, Canyon, Caprice, Impala, El Camino (1973-2013)
  • ✅ Performance Upgrade: 4.10 ratio ring & pinion set for GM 7.5"/7.625", improving torque, towing, and off-road capability.
  • ✅ Heavy-Duty 8620 Steel: Built for strength, durability, and smooth, quiet operation under high load conditions.
  • ✅ OEM Fitment: 27-spline pinion, 10-bolt ring gear, 7.5" diameter, standard rotation, 41/10 tooth count, exact OE replacement.
  • ✅ Extensive Compatibility: Fits Camaro, S10, Blazer, Astro, Colorado, Canyon, Caprice, Impala, El Camino, Roadmaster & more (1973-2013).
  • ✅ Reliable Warranty: 1-year / 50,000-mile warranty ensures long-lasting durability and high-performance reliability.
SaleNo. 20
Motive Gear GM12-373A Differential Ring & Pinion Set, GM 8.875", 3.73 Ratio, 30-Spline, 12-Bolt, Fits C10, K10, Blazer, Suburban, Jimmy, G-Series, P-Series, GMC C1500, K1500, C2500, K2500 Trucks
  • ✅ Performance Gear Upgrade: 3.73 ratio improves acceleration & torque for GM 8.875" 12-bolt differentials in trucks & SUVs.
  • ✅ Durable 8620 Steel: Heavy-duty material ensures long-lasting strength, smooth operation & high-performance reliability.
  • ✅ Precision Fitment: 12-bolt ring gear, 30-spline pinion, 8.875" diameter, requires a 3.73+ carrier for proper installation.
  • ✅ Optimized for Power & Towing: Ideal for off-road, towing, and daily driving, enhancing traction and drivetrain efficiency.
  • ✅ Reliable Warranty: Backed by a 1-year / 50,000-mile warranty for long-lasting dependability in Chevrolet & GMC truck models.

How to choose a good automotive differential ring and pinions

Does the idea of finding a fantastic automotive differential ring and pinions make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!

Your presence here indicates that you are interested in automotive differential ring and pinions. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top automotive differential ring and pinions products available right now. You might be wondering how we came up with the list. How was this buying guide developed?

First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top automotive differential ring and pinions on the market right now!

The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:

Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top automotive differential ring and pinions brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.

Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top automotive differential ring and pinions based on those.

Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.

Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.

Customer ratings:  Would it be accurate to suggest that the automotive differential ring and pinions were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.

Customer Reviews: Like ratings,  provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.

Seller Rank: This is very intriguing! Not only do you need a good automotive differential ring and pinions, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.

Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your automotive differential ring and pinions.

Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting automotive differential ring and pinions for months and years to come.

Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.

Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.

These are the standards by which we selected our automotive differential ring and pinions. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.

Why should you believe us?

There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what automotive differential ring and pinions should you purchase in 2022?

This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on automotive differential ring and pinions.