Best Ring And Pinion Gears for GM, Ford and Dana Differentials

#1 · Best Overall

1. Yukon GM8.5 3.73

• Weight: 17.7 lb

Best for: GM 8.5/8.6 3.73 replacement.

Why it ranks #1: Fits GM 8.5- and 8.6-inch differentials and lists a 3.73 ratio, 30-spline pinion, 10 bolts, and 8.50-inch ring gear.

The 3.73 ratio is the defining choice in this Yukon set, pairing a 30-spline pinion with a ring gear sized for GM 8.5- and 8.6-inch differentials. That specific combination gives buyers a clearly identified replacement option when their axle and target ratio match the listed application.

Yukon specifies a 3.73 ratio, so buyers can assess the intended gearing before beginning a differential change. The 30-spline pinion and 10-bolt ring gear configuration make the set's key fit details explicit, while the listed 8.50-inch ring gear diameter further narrows the application. Yukon also describes its gears as intended for street, track, and trail use, giving this set a broad stated operating context without changing the need to match the axle.

Skip it if you need a 3.42 ratio for a GM 8.5-inch axle; Motive Gear GM10-342A lists that ratio and application.

Choose this Yukon set if your GM 8.5- or 8.6-inch differential calls for a 3.73 ratio and 30-spline pinion. Its listed axle sizes and bolt details make application matching central before purchase.

Listed on Amazon as: Yukon Gear & Axle 3.73 ratio 30 spline pinion Ring and Pinion Set for GM 8.5" and 8.6" differentials

#2 · GM 3.73 Option

2. Motive GM10-373A

• Weight: 16 lb
• Dimensions: 15.5 x 11 x 5.25 in

Best for: GM 10-bolt 3.73 gearing.

Why it ranks #2: Specifies GM 8.5- and 8.625-inch 10-bolt fitment, a 3.73 ratio, and 30 splines, with 8620 steel construction listed.

Motive Gear specifies a 3.73 ratio and 30-spline pinion for this GM 8.5- and 8.625-inch, 10-bolt differential set. That combination lets buyers target a stated gear ratio while checking their axle against the listed application.

The 3.73 ratio identifies the gearing, and the stated GM 8.5- and 8.625-inch 10-bolt application helps focus compatibility checks. Motive Gear lists 8620 steel construction with heat treatment for wear resistance, connecting the material specification to the demands of regular or heavier operation. Its OE direct-fit description supports a replacement workflow, while the listed 30-spline pinion gives another concrete fit detail to verify before installation.

Skip it if you need gears for a Dana 70 axle; Yukon Gear & Axle YG D70-354 lists that axle family, though its ratio is 3.54.

This Motive Gear set fits buyers seeking 3.73 gearing for a compatible GM 8.5- or 8.625-inch 10-bolt differential. Confirm the axle and pinion details, especially when the vehicle requires a different application.

Listed on Amazon as: Motive Gear GM10-373A Differential Ring & Pinion Set, 3.73 Ratio, 30-Spline

#3 · Ford 8.8 Pick

3. Ford Racing M420988373

• Weight: 18.5 lb

Best for: Ford 8.8-inch 3.73 upgrade.

Why it ranks #3: Fits Ford 8.8-inch rear ends through 2014 and includes a Ford pinion nut and crush sleeve; the 3.73 ratio is specified.

Ford specifies a 3.73 ratio, 8.8-inch application, and included pinion nut and crush sleeve in this set. Those concrete details help buyers assess both the intended gearing and two components supplied for the installation workflow.

The 3.73 ratio and Ford 8.8-inch fitment define the main compatibility check, while the stated fit range covers Ford 8.8-inch rear ends through 2014 and excludes 2015-and-newer models. Including a Ford pinion nut and crush sleeve means those named components come with the set. Ford also cites surface finish, hardening, and manufacturing consistency as attributes behind its OEM-quality claim, connecting production details to its stated strength and quiet-operation aims.

Skip it if you need 3.55 gearing for a Ford 8.8-inch application; Ford Racing M420988355 lists that ratio.

Choose this Ford Racing set for a compatible Ford 8.8-inch rear end through 2014 when 3.73 gearing is required. Its stated year boundary and included hardware are important installation and fit considerations.

Listed on Amazon as: Ford Racing M420988373 8.8" 3.73 Ring and Pinion

#4 · GM 3.42 Option

4. Motive GM10-342A

• Weight: 17.7 lb
• Dimensions: 15.5 x 11 x 5.25 in

Best for: GM 8.5-inch 3.42 gearing.

Why it ranks #4: Lists GM 8.5- and 8.625-inch 10-bolt fitment, a 3.42 ratio, 30 splines, and heat-treated 8620 steel.

Motive Gear pairs a 3.42 ratio with 8620 steel construction in this set for GM 8.5- and 8.625-inch, 10-bolt differentials. The combination gives owners a specific replacement path when they want that ratio and their axle matches the listed application.

The 3.42 ratio identifies the gearing this set supplies, while the stated GM 8.5- and 8.625-inch, 10-bolt fitment helps narrow the compatibility check. Motive Gear describes the 8620 steel gears as heat-treated for wear resistance and durability under heavy loads, a useful consideration for buyers weighing demanding use. Its OE direct-fit description also points toward a replacement workflow, though axle and ratio details still need to match the vehicle.

Skip it if you need 3.73 gearing for a GM 8.5-inch differential; Motive Gear GM10-373A lists that ratio and axle family.

This set suits a buyer replacing gears in a compatible GM 8.5- or 8.625-inch, 10-bolt differential who needs 3.42 gearing. The axle specification and ratio are the key boundaries to check.

Listed on Amazon as: Motive Gear GM10-342A Ring & Pinion 3.42 Ratio 30 Spline 10 Bolt for GM 8.5

#5 · Dana 70 Pick

5. Yukon Dana 70 3.54

• Weight: 20.9 lb

Best for: Dana 70 3.54 replacement.

Why it ranks #5: A specific Dana 70 replacement set with a 3.54 ratio; Yukon lists a one-year warranty against manufacturer defects.

The Dana 70 application and 3.54 ratio define this Yukon ring and pinion set, giving owners a specifically identified option for that differential. Yukon also describes its gears as intended for street, off-road, and track use, extending the stated use beyond a single driving setting.

A 3.54 ratio makes the gear change explicit, while the Dana 70 designation narrows the axle application for the replacement decision. Yukon says its manufacturing technologies aim for quiet-running gears that are strong and easy to set up, which speaks to both operation and installation workflow. Its stated suitability for street, off-road, and track use adds a broad use context, but the Dana 70 fitment remains the essential compatibility boundary.

Skip it if you need 3.73 gears for a GM 8.5-inch differential; Motive Gear GM10-373A lists that ratio and application.

Choose this Yukon set if your Dana 70 differential calls for 3.54 gearing and you value the maker's stated quiet-running and setup characteristics. Its axle designation is the key fit boundary.

Listed on Amazon as: Yukon (YG D70-354) High Performance Ring and Pinion Gear Set for Dana 70 Differential, dana 70 in 3.54 ratio

#6

6. USA Standard GM8.5 3.23

• Weight: 17.78 lb
• Dimensions: 16 x 12 x 6 in

Best for: GM 8.5-inch 3.23 ratio.

Why it ranks #6: Specifies GM 8.5-inch differential fit and a 3.23 ratio, making it a useful option when that axle and gearing match.

A 3.23 ratio is the central specification of this USA Standard Gear set, which is listed for GM 8.5-inch differentials. That vehicle-specific application gives buyers a focused replacement or ratio-change option when their axle requires this gearing.

The stated GM 8.5-inch fitment and 3.23 ratio help buyers narrow the application before planning a differential service. USA Standard Gear describes its range as covering common and hard-to-find applications, while this specific listing identifies a common axle family and a particular ratio. Those details support a targeted replacement decision; they do not replace matching the differential and desired ratio to the vehicle before installation.

Skip it if you need a listed GM 8.6-inch fitment; Yukon Gear & Axle YG GM8.5-373 names both GM 8.5- and 8.6-inch differentials.

Consider this USA Standard Gear set when your GM 8.5-inch differential needs a 3.23 ratio. It is a focused fitment choice, so buyers seeking another axle size or ratio should look elsewhere.

Listed on Amazon as: USA Standard Gear (ZG GM8.5-323) Ring & Pinion Gear Set for GM 8.5 Differential, 3.23 gear ratio

#7

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7. Ford Racing M420988355

• Weight: 18.9 lb
• Dimensions: 15 x 11.5 x 5.5 in

Best for: Ford 8.8-inch 3.55 gearing.

Why it ranks #7: Identifies an 8.8-inch Ford ring and pinion with a 3.55 ratio, though the listing provides fewer fitment details than the 3.73 set.

The Ford 8.8-inch application and 3.55 ratio are the clearest identifiers for this ring and pinion set. Those specifications give Ford owners a defined starting point for a gear replacement or ratio change when their differential calls for this combination.

Ford lists this set for an 8.8-inch application with a 3.55 ratio, helping buyers narrow the gear choice around axle size and intended gearing. The product dimensions and 18.9-pound listed weight provide handling information for receiving and moving the set during a workshop job. Because the supplied feature text does not add spline, bolt, or included-component details, the axle and ratio remain the main stated selection points.

Skip it if you need a listed Ford 8.8-inch 3.73 set with pinion nut and crush sleeve; Ford Racing M420988373 specifies those details.

This Ford set is for buyers seeking a 3.55 ratio in an 8.8-inch application. Since the supplied specifications do not identify spline count or included hardware, use those details as boundaries when planning the job.

Listed on Amazon as: Ford Racing M420988355 8.8" 3.55 Ring and Pinion

#8

8. Motive Chrysler 9.25 3.92

• Weight: 19.93 lb
• Dimensions: 15 x 11 x 5.25 in

Best for: Chrysler 9.25-inch 3.92 gears.

Why it ranks #8: Targets a Chrysler 9.25-inch rear differential and lists a 3.92 ratio, 29-spline pinion, 12-bolt design, and 8620 steel.

A 3.92 ratio, Chrysler 9.25-inch application, and 29-spline pinion distinguish this Motive Gear set. The listed ZF 235mm differential specification further narrows its intended fit, giving buyers several concrete details to compare with their rear axle.

Motive Gear identifies the set for Chrysler 9.25-inch rear differentials and ZF 235mm units, so the axle specification can guide compatibility checks. The 3.92 ratio and 29-spline pinion add two more selection details, while the 12-bolt design is described as an OEM replacement configuration. Its 8620 steel construction is presented as wear resistant and durable, linking the material choice to the stated goal of reliable operation in daily and heavy-duty use.

Skip it if you need gears for a GM 9.25-inch IFS reverse-rotation differential; Yukon Gear & Axle YG GM9.25-488R lists that application.

This Motive Gear set suits buyers matching a Chrysler 9.25-inch, ZF 235mm differential that needs 3.92 gearing. Its 29-spline pinion and 12-bolt design make application verification essential.

Listed on Amazon as: Motive Gear C9.25-392 Differential Ring & Pinion 3.92 Ratio For Chrysler 9.25"

#9

9. Yukon GM9.25 4.88 Reverse

• Weight: 20.2 lb

Best for: GM 9.25-inch IFS 4.88 gears.

Why it ranks #9: A specialized GM 9.25-inch IFS reverse-rotation set with a stated 4.88 ratio; its narrow fitment suits only matching applications.

A 4.88 ratio for a GM 9.25-inch IFS reverse-rotation differential is the defining specification of this Yukon set. That narrow application gives buyers a clearly identified option when their front differential and desired gearing match the listing.

The 4.88 ratio specifies the gearing, while GM 9.25-inch IFS reverse-rotation fitment establishes the axle configuration buyers need to match. Yukon describes its ring and pinion sets as intended for demanding conditions on street, trail, and track, which provides a broad stated use context. These details support a focused application check, but the reverse-rotation designation makes matching the differential configuration particularly important before installation.

Skip it if you need 3.92 gearing for a Chrysler 9.25-inch rear differential; Motive Gear C9.25-392 lists that application and ratio.

Choose this Yukon set when a GM 9.25-inch IFS reverse-rotation differential requires 4.88 gearing. The specific axle configuration and ratio are essential fit boundaries; it is not listed as a general rear-axle set.

Listed on Amazon as: Yukon Gear YG GM9.25-488R) High Performance Ring and Pinion Gear Set for GM 9.25" IFS Reverse Rotation Differential

#10

10. Yukon YG-TLC-456

• Weight: 14.9 lb

Best for: Yukon high-performance gear set.

Why it ranks #10: Lists a 4.56 model designation but provides no differential application in the supplied product facts, making fit harder to verify.

Yukon describes this high-performance set as intended for street, off-road, and track use, with a stated focus on quiet-running gears that are strong and easy to set up. The listed model number, YG-TLC-456, identifies the specific set.

Yukon presents quiet operation and easier setup as aims of its gear design, giving buyers practical considerations for both driving and installation. The brand also says its sets are designed for demanding conditions across street, off-road, and track use. The supplied specifications identify model YG-TLC-456 and a 14.9-pound item weight, but do not name an axle application or ratio here, so those details should guide selection only after the application is established.

Skip it if you need a stated GM 8.5-inch application and 3.73 ratio; Yukon Gear & Axle YG GM8.5-373 supplies both details.

This Yukon set may suit buyers who have already confirmed that model YG-TLC-456 matches their axle and ratio needs. The supplied listing leaves those application details unspecified, making that confirmation essential.

Listed on Amazon as: Yukon High Performance Ring & Pinion Gear Sets