Top 10 Best differential gearbox in 2026

Last Updated - 6/20/2026

🏆Best Choice

Valvoline

Valvoline FlexFill Advanced Full Synthetic 75W-90 Gear Oil 1 Quart Pouch

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•FlexFill squeezable pouch releases 2X more fluid with less effort for 3X faster filling vs. traditional bottle packaging
•Contains limited slip for optimal performance of the clutch pack, while also delivering 30% better protection against towing and heavy loads and 1.5X better gear wear protection
•Advanced full synthetic helps prevent noise and reduce chattering, while protecting gear teeth from wearing out prematurely
•High and low temperature protection ranges from -50F to 300F degrees for cold temperature fluidity and high temperature performance
•Fights rust and corrosion with corrosion inhibitors and safeguards against impurities, oxidation and thermal breakdown
•Meets or exceeds requirements for: SAE J2380, MACK GO-J, Meritor 0-94 Rev Level A, API GL-5, GMW 16445; the addition of a supplemental friction modifier (Ford M2C-118-A, Chrysler MS-5630, or GM 1052358) is not required. Can be used in non-synchronized manual transmissions calling for API GL-4
•American made and formulated, from the Original Motor Oil brand trusted for more than 150 years

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$15.48

$17.29

-10%

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Bar's Leaks

Bar's Leaks Axle and Differential Gear Repair, 16.9 Oz

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•STOPS PINION, AXLE, OUTPUT SHAFT AND OTHER SEAL LEAKS: This is a treatment additive for use with automotive, heavy duty, agricultural, marine and industrial gear oils.
•ANTI-WEAR AW AGENTS: Superior anti-wear, anti-foam and anti-corrosion protection.
•SEAL CONDITIONER: Extends system life by stopping leaks, reducing noise and improving gear performance.
•PERFORMANCE ADDITIVE BOOSTER: Designed to mix with all synthetic and conventional petroleum GL-4, GL-5, MT-1 gear oil / lube grades including 75W-90, 80W-90, 75W-140, 85W-140 and all others.
•Manufactured in the USA, this product works in all manual gearboxes, differentials, open & posi axles and more. Stops pinion, axle, output shaft and other seal leaks. Reduces grinding, whining, clunking and protects gears.

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$16.02

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USA Standard Gear

USA Standard Gear (ZK GM8.6) Master Overhaul Kit for GM 8.6 Differential

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•USA Standard Master Overhaul kits let you finish your install with confidence
•This kit uses Koyo bearings and races
•Includes carrier bearings and races,
•Includes complete shim kit
•Includes ing gear bolts, pinion nut, crush sleeve
•Includes thread locker, marking compound with brush and gasket
•Fit type: Vehicle Specific

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$95.00

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maXpeedingrods

maXpeedingrods Go Kart Forward Reverse Gearbox Kit 212cc for 2HP-13HP Engine 4 Stroke Only Works with 30 Series Torque Converter 3 Shift Modes #35 Chain Go Karts Accessories Go Kart Transmission

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•▶Gearbox Kit 30 Series -This forward reverse gearbox is suitable for go-karts,utility vehicles and other applications with engines up to 14HP and # 35 chain 12T and #40/41/420 chain 10T (Both sprockets included).Please note only use on 30 Series
•▶Standard Adaptation Parameters-Shaft Size: 5/8" with 3/16" keyway; Gearbox Speed: 5/13 of the Clutch speed; Shifter Cable Length: 1540mm ( 5' ) ( 60'' ).Forward Ratio: 1:1:3,Reverse Ratio: 1:2:6
•▶Complete Accessories-1x Forward / Reverse Gearbox with 3/16" Keyway;2x Mounting Plates;1x Shifter Disc;2x Shifter Cable;1x 10T and 12T Sprocket;1x Shifter Assembly
•▶Product Use-This product was filled with oil before leaving the factory,when the oil is used up,it needs to be filled to half of the box,and this go-kart gearbox is use GL-5 gear oil
•▶Three Shift Modes-This kit has three shift models: forward,reverse and neutral,which is for more convenient and easy operation.Made of high-quality metal,features with durable and lightweight for a long use life.Please contact us if you have any questions

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$104.39

$115.99

-10%

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Zreneyfex

Zreneyfex 12361-300-000 Rear Differential Gear Case Oil Cap Replacement for Honda TRX 250 300 350 400 450 500 Gearbox Oil Cap Gear Case Filler Cap

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Replace Part Number: 12361-300-000
•Fitment: Replacement for Honda TRX 250 300 350 400 450 500
•Materials: Constructed from aluminum material, offering high strength, corrosion resistance, and durability for prolonged use
•Function: Serves as a protective cover for the rear differential gear case, ensuring proper sealing and protection for the internal components
•Package Content: 1 * Gear Case Oil Cap, 1 * Gasket

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$7.99

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Hosim

Hosim RC Car Front Gear-Box Assembly Original Accessory Spare Parts FY-QBX02 1/10 X08 X07 Brushless High Speed RC Cars

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•NO.:FY-QBX02
•Product: RC Car Front Gear-Box FY-QBX02
•100% New Well made and durable
•Material: Metal & Plastic
•Original Parts Fit for hosim 1/10 X08 X07 Brushless High Speed RC Cars

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$17.98

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MOHERO

MOHERO RC Gearbox Front Rear Differential Gears 43T 10T Steel Diff Gear Set for 1/8 Scale 4WD Sledge Off-Road Truck Upgrade Part

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Suit for 1/8 Scale 4WD Sledge Off-Road Truck
•Made of high quality steel material, durable and long-lasting
•High precision CNC machined, easy to install and upgrade from the old & broken part
•Package Includes: 1 x 43T Differential Gear & 1 x 10T Input Gear

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$18.99

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DEEFILL

DEEFILL M22x1.5 Stainless Steel Magnetic Front/Rear Differential Drain Plug, Transfer Case Oil Drain Plug Gearbox Oil Fill Fit for BMW, Mini Copper Replace 33117525064

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•SPECIAL MAGNET RETENTION DESIGN - Prevents magnet detachment during hard driving. DEEFILL's Magnet Retention Design complete eliminates the risk of magnet head drops, protected your engine from the risk of head dropping and causing serious damage.
•FUNCTION - N45 Grade Super Strong Magnetism: The Magnetic Oil Drain Plug features an N45 neodymium magnet with a magnetic force of up to 5000 Gauss. This Magnetic drain plug offers high-temperature resistance and exceptional adsorption capabilities, making it an excellent assistant for vehicles. Magnetic differential/engine drain plug effectively attracts and removes metal debris generated by gear wear in high-temperature environments, helping to keep the oil clean and thus extending the vehicle's lifespan.
•PREMIUM MADE - This automotive replacement differential/transfer case drain plug is crafted from high-grade sus304, utilizing advanced CNC cutting technology to ensure durability and a precise thread fit. It matches the suitability of the original drain plug, offering superior hardness. Highly resistant to breakage and corrosion, this M22 1.5 drain plug guarantees a long-lasting and durable lifespan.
•LEAK PROOF SEAL - This Front / Rear Differential/Transfer Case Drain Plug includes a high-purity copper drain plug gasket. The copper crush washer dimensions are: inner diameter 22 mm (0.87 inches), outer diameter 28mm (1.1 inches), and thickness 1.5 mm (0.06 inches). Designed with excellent ductility and sealing properties, it fits snugly around the drain plug to effectively prevent oil leaks and ensure engine/differential safety.
•FITMENT OF DIFFERENTIAL AND TRANSFER CASE - DEEFILL M22x1.5 Differential / Transfer Case Drain Plug Fit for 1985-2022 BMW 228i 230i 320i 328d 328i 330i 335i 340i 428i 430i 435i 440i 528i 530i 535d 535i 540i 550i 640i 650i 740i 745i 750i, ActiveHybrid 3 5 7, Alpina B6 B7, M2 M3 M4 M5 M6, X1 X3 X4 X5 X6; 2011-2019 Mini Copper. Use Amazon's "Fitment" dropdown to verify compatibility with your vehicle.
•FITMENT OF ENGINE OIL PAN - DEEFILL M22x1.5 Stainless Magnetic Engine Oil Drain Plug Also fit for John Deere Gator CS CX TX, KTM Duke Adventure Supermoto 620 640 950 990，Ducati 999 749 996 748 Monster Multistrada Hypermotard 600 750 900 1000 1100 1100 S2R S4R Bimota DB6, 2004-2020 ROLLS-ROYCE, Replace M806544, 6004178. Use Amazon's "Fitment" dropdown to verify compatibility with your vehicle.
•CROSS REFERENCE - Replace 33-11-7-525-064, 33 11 7 525 064, 33.11.7.525.064, 33117525064, 07-11-9-919-130, 07 11 9 919 130, 07.11.9.919.130, 07119919130, 07-11-9-919-131, 07 11 9 919 131, 07.11.9.919.131, 07119919131, 23-11-1-201-261, 23 11 1 201 261, 23.11.1.201.261, 23111201261, 33-11-1-210-045, 33 11 1 210 045, 33.11.1.210.045, 33111210045, 33-11-1-212-682, 33 11 1 212 682, 33.11.1.212.682, 33111212682, 33-11-7-512-865, 33 11 7 512 865, 33.11.7.512.865, 33117512865, M806544, 6004178

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$24.99

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Treehobby

Treehobby Metal Front&Rear Differential Gearboxes Housing Cover with Differential Gear Set Compatible with WLtoys 1/14 144010 144001 144002 124018 124016 124017 124019 RC Car Upgrades Parts (Black)

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•➤Package List: 1x Metal Gearboxes,Differential Gear Set*1.
•➤Material:High quality Aluminum Alloy material, abrasion proof, And has a long service life.
•➤Compatibility: Compatible With WLtoys 1/14 144010 144001 144002 124018 124016 124017 124019 RC Car Upgrades Parts.
•➤Easy to install，Machined for precision,easy upgrade, It can provide stronger support, and drive more smoothly.
•➤100% new quality Treehobby RC products, exquisite workmanship and durable, safe to buy, 24 hours customer service.

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$19.88

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Rushmore

The Complete Model 'A' Ford Restoration Manual. Now 435 pages. All in color. A great birthday gift.

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•A marvelous gift. Authentic information. Easily understood. Reliable information; Cost saving; Model 'A' Ford restoration authenticity; Over 2000 color pictures; close up pictures of parts; Clear photography; Easy to understand.. Houdaille shock absorbers, front end pictures and specifications. Front spring data.
•Impress your friends with knowledge; Spiral bound to lie flat; Quality paper; Covers all mechanical aspects; 1928; 1929; 1930; 1931; Fords; Save time; Easy to repair. Assembly line photographs. Technical details.
•No line drawings; No mistakes; All color; Extra 45 pages in this 2nd for free; New edition; USA printed; Repair shortcuts; Frame repair; Gearbox; Differential; Engine; Electrical with diagrams. Exhaust system. Tail light. Headlight and cowl lights. 6 and 12 volt system changeover.
•Large comprehensive 440 page; detailed; Covers left hand and right hand drive; Ideal for beginners; Easy to understand. Covers steering two tooth Gemmer. Seven tooth Ford. Gravity feed fuel, sediment bowls, Zenith carburetor, water pump and fan blade, fan belt. .
•53 years of authors Model 'A' ownership; Author can be contacted by email; Bright; Colorful photos; Descriptive text; Technical; helpful in every way; gain knowledge; impress your friends with what you know. Lowering the top on a Phaeton or Roadster, authentic door panels and fasteners.

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$79.95

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