2003 Toyota Tundra Differentials

Keep Your 2003 Toyota Tundra in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 2003 Toyota Tundra looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Axle Shafts, Differential Oil, and Differential Ring Gear Bolts. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Differentials from Trusted Brands

Looking for a reliable Differential? We’ve got you covered with options from brands you know and trust like Valvoline, Royal Purple, and National. For example, Valvoline Differentials start at just $14.49 with an average 4.8 star rating. Royal Purple and National offer similar pricing and quality, backed by strong customer feedback. With over 3,801 reviews and a solid 4 star average, you can shop with confidence knowing other Toyota Tundra owners approve.

Competitive Prices and Extensive Inventory

The average price for a 2003 Toyota Tundra Differential at Advance Auto Parts is around $240.84, with a range that starts at $5.99 and goes up to $883.99. With 94 options in stock from 10 trusted brands, finding the right fit is easy. Popular picks like DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart, DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart, and Flex Fill Transmission & Differential Gear Oil: Full Synthetic 75W-90, 1 Quart start at just $11.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Differential, don’t forget to check out other key components like 4WD Components and Universal Joints. At Advance Auto Parts, we’re here to help you keep your 2003 Toyota Tundra in peak condition, inside and out.

Essential 2003 Toyota Tundra Differentials

Yukon Gear – Yoke For Toyota 10.5" Rear, Tundra With 5.7L (Part No.41178)

Yoke For Toyota 10.5" Rear, Tundra With 5.7L

from

$385.99
Yukon yoke for Toyota 10.5″ rear, Tundra w/5.7L. All Yukon yokes come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Toyota 10.5″ Tundra rear
  • 34 spline
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National – Bearing Race (Part No.HM88610)

Bearing Race

from

$15.49
Manufactured with premium-grade steel, National taper bearing cups feature crowned raceways to ensure even load distribution.

Product Features:
  • PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
  • SMOOTH ROTATION – Crowned raceways for even load distribution
  • OE-STYLE DESIGN – Engineered to meet OE specifications
  • COMPREHENSIVE COVERAGE – Industry-leading coverage for domestic and import applications
  • RIGOROUS TESTING – Comprehensive testing throughout design and development processes by National engineers for quality you can count on
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Yukon Gear – T100 & Tacoma Standard Cross Pin Shaft (Part No.33417)

T100 & Tacoma Standard Cross Pin Shaft

from

$73.99
Product Features:
  • Cross pin shaft
  • Fits Toyota Tacoma and T100
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Yukon Gear – Differential (Part No.26050)

Differential

from

$759.99
Differential

LuK – Differential Repair Kit (Part No.GDK381)

Differential Repair Kit

from

$868.99
Product Features:
  • Each LuK GearBOX contains all the OE quality bearings needed for a professional transmission repair
  • LuK Differential Bearing Kits are designed to meet or exceed OEM requirements. This will ensure customer satisfaction.
  • LuK Differential Bearing Kits contain the bearings and seals needed to complete the job.
  • LuK Differential Bearing Kits include wear parts such as seals, O-rings, shaft sealing rings, support bearings and spare parts where necessary for eliminating the specific cause of failure.
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Yukon Gear – T100 & Tacoma Roll Pin (Part No.33420)

T100 & Tacoma Roll Pin

from

$8.99
Product Features:
  • Roll pin
  • Fits Toyota Tacoma and T100
See More

Motive Gear – Differential Gear Install Kit (Part No.TOYV6IK)

Differential Gear Install Kit

from

$42.99


Product Features:
  • TOYOTA 8″ V6&4CLY TURBO
See More

Yukon Gear – Pinion Install Kit For Toyota T100 And Tacoma (Without Locking Differential) (Part No.13085)

Pinion Install Kit For Toyota T100 And Tacoma (Without Locking Differential)

from

$399.99
Yukon Pinion installation kits are a terrific solution for gear installation on lower mileage vehicles where the carrier bearings & races can be reused. This kit uses high quality bearings and races along with a high quality pinion seal and small parts. Included in this kit are the pinion bearings and races, pilot bearing (if applicable), crush sleeve (if applicable), complete pinion shim kit, pinion nut, thread locker, and marking compound with brush. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your pinion gear.

Product Features:
  • Fits Toyota Tacoma and T100 without factory locking differential
  • Included are pinion bearings and races, pinion seal, crush sleeve, complete pinion shim kit, and marking compound with brush.
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National – Differential Pinion Seal (Part No.710734)

Differential Pinion Seal

from

$28.99
National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:
  • Design type: spring loaded; multi-lip
  • Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
  • Resistance to EP lubricants
  • Low swell in hydrocarbon fluids
  • Delivers quality and reliable performance for every type of repair
See More

Royal Purple – High Performance 5W-30 Synthetic Engine Oil, Better Wear Protection, 5 Quart (Part No.51530)

High Performance 5W-30 Synthetic Engine Oil, Better Wear Protection, 5 Quart

from

$41.99
Royal Purple Motor Oil is a specially formulated multi viscocity oil for use in gasoline and diesel engines of all types from cars and trucks to SUVs, motorcycles and boats. Royal Purple(R) Motor Oil with Synerlec(R) additive technology reduces friction, which results in a 1-3 percent increase in horsepower, lowers operating temperatures, provides superior corrosion protection, improves fuel economy, reduces emissions and extends oil life. A.P.I. Certified.

Product Features:
  • Better wear protection
  • Increased fuel efficiency
  • Better protection of the expensive catalytic emission system
  • Improved compatibility with fuels containing ethanol
  • Superior corrosion protection
  • Meets ILSAC GF-5 and Dexos1 performance requirements
See More

National – Multi-Purpose Bearing (Part No.30025)

Multi-Purpose Bearing

from

$89.99
Product Features:
  • CONSISTENT PERFORMANCE: Matched cup and cone components ensure consistent performance
  • PREMIUM MATERIALS: Precision manufactured using high-quality materials for durability and performance
  • OE-STYLE DESIGN: Engineered to meet OE specifications
  • COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
  • RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on
See More

Dorman – Pre-Pressed Axle (OE Fix) (Part No.926-146)

Pre-Pressed Axle (OE Fix)

from

$928.99
Replacing a worn wheel bearing usually requires a time-consuming procedure with a shop press. This Dorman OE FIX loaded axle includes all critical components already assembled for a fast, simple, safe install.

Product Features:
  • Easier installation – this loaded axle assembly includes a pre-assembled new axle shaft, wheel bearing, hub and backing plate
  • Time saver – eliminates frustrating, unpredictable work required to replace bearings without damaging other components
  • Simpler solution – eliminates the need to use potentially dangerous shop press to perform complete bearing repair
  • Quality tested – this part has undergone try-on, corrosion and material testing to ensure a quality fit and long service life
See More

Dorman – Differential Cover (OE Fix) (Part No.926-958)

Differential Cover (OE Fix)

from

$125.99
When the thin-gauge steel corrodes on Sequoia, Tacoma, Tundra truck rear differential covers, the typical solution has been to replace the entire axle. This Dorman OE FIX weld-on solution allows direct replacement of only the failed cover.

Product Features:
  • Direct replacement – this weld-on differential cover directly replaces a corroded original cover on certain Sequoia, Tacoma and Tundra trucks
  • Cost-effective repair – rather than buy a new axle, cut off the old cover and weld on this new one
  • Greater durability – constructed from heavier-gauge stamped steel than the original cover
  • Ready to install – pre-primed in weldable primer for a clean installation
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Yukon Gear – T100 & Tacoma Standard Side Gear Thrust Washer 1.60Mm (Part No.33399)

T100 & Tacoma Standard Side Gear Thrust Washer 1.60Mm

from

$18.99
Product Features:
  • Side gear thrust washer
  • Fits Toyota Tacoma and T100
See More

Yukon Gear – Ring Gear Bolt For Toyota T100, Tacoma & 8" IFS Front (Part No.33059)

Ring Gear Bolt For Toyota T100, Tacoma & 8" IFS Front

from

$15.99
Ring Gear bolt for Toyota T100, Tacoma & 8″ IFS front. 12mm x 1.0.

Product Features:
  • Ring gear bolt for Toyota T100 and Tacoma rear without factory locking differential and Toyota Clamshell front
  • 12mm x 1.0
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Yukon Gear – Toyota 07 & Up Tundra Rear 9.5" Outer Pinion Slinger With 4.0L & 4.7L (Part No.33023)

Toyota 07 & Up Tundra Rear 9.5" Outer Pinion Slinger With 4.0L & 4.7L

from

$21.99
Toyota 07 & up Tundra rear 9.5″ outer pinion slinger w/ 4.0L & 4.7L .

Product Features:
  • Outer slinger
  • Fits 9.5″ Toyota Tundra
See More

Yukon Gear – Yoke For Toyota 7.5" IFS (And ’85 And Newer Rear) With 23 Spline Pinion (Part No.41106)

Yoke For Toyota 7.5" IFS (And '85 And Newer Rear) With 23 Spline Pinion

from

$246.99
Yukon yoke for Toyota 7.5″ IFS (and ’85 and newer rear) with 23 spline pinion. All Yukon yokes come with a one year warranty against manufacturing defects.

Product Features:
  • Fits Toyota 7.5″
  • 23 spline
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Yukon Gear – Pinion Nut (Part No.33156)

Pinion Nut

from

$5.99
Pinion nut for Suzuki Samurai, Toyota 8″, V6, Landrcuiser (fine spline pinion) & T100/Tacoma with factory locker. 30mm socket, M20 x 1.5 thread.

Product Features:
  • Pinion nut for Suzuki Samurai, Toyota 8″, V6, Landcruiser with 30 spline pinion and Tacoma/T100 with factory locker
  • 20mm x 1.5 thread
  • 30mm socket
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Yukon Gear – Toyota T100 & Tacoma Crush Sleeve (Part No.33120)

Toyota T100 & Tacoma Crush Sleeve

from

$16.99
Toyota T100 & Tacoma crush sleeve. Approx 2.325″ long.

Product Features:
  • Crush sleeve for Toyota Tacoma and T100 without factory locker
  • 2.235″ tall
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Yukon Gear – T100 & Tacoma Standard Pinion Gear Thrust Washer (Part No.33396)

T100 & Tacoma Standard Pinion Gear Thrust Washer

from

$30.99
Product Features:
  • Pinion gear thrust washer
  • Fits Toyota Tacoma and T100
See More

Yukon Gear – Pinion Preload Shim For Toyota T100 (Part No.55075)

Pinion Preload Shim For Toyota T100

from

$27.99
Pinion preload shim for Toyota T100. One single shim. 0.033″ thick. Two needed. Fits against crush sleeve.

Product Features:
  • Fits Toyota T100 and Tacoma
  • 0.140″ thick
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Yukon Gear – Standard Open Spider Gear Kit For Toyota T100 & Tacoma With 30 Spline Axles (Part No.16133)

Standard Open Spider Gear Kit For Toyota T100 & Tacoma With 30 Spline Axles

from

$461.99
Yukon standard open spider gear kit for Toyota T100 & Tacoma with 30 spline axles. Yukon uses higher quality materials and better techniques than OEM to ensure a longer lasting spider gear set. All components come with a one year warranty against manufacturing defects.

Product Features:
  • Spider gear kit
  • Fits Toytoa Tacoma and T100 open differential
  • Includes two side gears, two pinion gears, cross pin shaft, roll pin spider gear thrust washers.
See More

National – Shaft Repair Sleeve (Part No.99157)

Shaft Repair Sleeve

from

$37.99
National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:
  • Designed to repair damaged, grooved or worn shafts
  • Durable stainless steel construction for corrosion-free sealing surface that surpasses most original shaft specifications
  • Ideal for a shaft where indications of seal wear, such as tracks or grooves have developed
  • Ultra-thin construction (0.01/0.25mm wall thickness) allows original seal size to be used with minimal additional lip loading
  • Easy to install with removable flange and installation tool
  • Installation tool reduces sleeve distortion and allows for installation without removal from the shaft
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Yukon Gear – Outer Oil Slinger (Part No.33025)

Outer Oil Slinger

from

$10.99
Outer oil slinger for Toyota 7.5″, 8″, V6 & Landcruiser.

Product Features:
  • Outer oil slinger for Toyota 7.5″, 8″, V6 and Landcruiser
See More

Felpro – Differential Carrier Gasket Round Shaped 10 Bolt Hole Gasket (Part No.RDS 55428)

Differential Carrier Gasket Round Shaped 10 Bolt Hole Gasket

from

$6.49
Fel-Pro® gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Unsurpassed quality you can trust
  • Validated for fit, form and function
  • Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes
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Yukon Gear – The Carrier Bearing Puller (Part No.56072)

The Carrier Bearing Puller

from

$883.99
The Yukon carrier bearing Puller works with an impact gun to quickly and safely remove carrier bearings without damaging them. This unit comes with a handy bench top stand and works with up to one ton applications including Dana 70HD, Dana 80, 10.25″ & 10.5″ Ford, or GM & Chrysler 11.5″ differentials.

Product Features:
  • Carrier bearing puller
  • Works with an impact gun to safely and easliy remove carrrier bearings
See More

Yukon Gear – Minor Install Kit For Toyota T100 And Tacoma Rear Differential (Part No.12069)

Minor Install Kit For Toyota T100 And Tacoma Rear Differential

from

$144.99
Yukon Minimum installation kits are a low cost solution for gear changes in newer vehicles where the bearings can be reused. This kit uses all high quality components to ensure a smooth set up. kit includes a pinion seal, crush sleeve (if applicable), complete shim kit, marking compound and brush.

Product Features:
  • Fits Toyota Tacoma and T100 without factory locking differential
  • Included are a pinion seal, crush sleeve, complete shim kit, marking compound and brush.
See More

Yukon Gear – FullSpool (Part No.32384)

FullSpool

from

$364.99
FullSpool

Most Popular Differential Axle Shafts for 2003 Toyota Tundras

Enhance your 2003 Toyota Tundra with one of the 4 Differential Axle Shafts we have in stock, starting at just $123.99.

Dorman – Axle Shaft Kit (Part No.630-340)

Axle Shaft Kit

from

$412.99
Axle shaft damaged or bearings worn out? This axle shaft directly replaces the original equipment on certain vehicles, complete with all necessary application-specific installation components.

Product Features:
  • Direct replacement – this axle shaft replaces the original equipment on specific vehicle years, makes and models
  • Complete kit – each shaft includes critical installation hardware and components needed for specific vehicle applications
  • Durable construction – designed to rigorous standards and tested to ensure performance
  • Trustworthy solution – backed by team of engineers and quality control specialists in the United States
See More

Dorman – Pre-Pressed Axle (OE Fix) (Part No.926-148)

Pre-Pressed Axle (OE Fix)

from

$872.99
Replacing a worn wheel bearing usually requires a time-consuming procedure with a shop press. This Dorman OE FIX loaded axle includes all critical components already assembled for a fast, simple, safe install.

Product Features:
  • Easier installation – this pre-pressed axle assembly includes a new axle shaft, wheel bearing, hub and backing plate pre-assembled and ready to install right out of the box
  • Time saver – eliminates frustrating, unpredictable work required to replace bearings without damaging other components
  • Simpler solution – eliminates the need to use potentially dangerous shop press to perform complete bearing repair
  • Quality tested – this part has undergone try-on, corrosion and material testing to ensure a quality fit and long service life
See More

Dorman – Pre-Pressed Axle (OE Fix) (Part No.926-147)

Pre-Pressed Axle (OE Fix)

from

$574.99
Replacing a worn wheel bearing usually requires a time-consuming procedure with a shop press. This Dorman OE FIX loaded axle includes all critical components already assembled for a fast, simple, safe install.

Product Features:
  • Easier installation – this pre-pressed axle assembly includes a new axle shaft, wheel bearing, hub and backing plate pre-assembled and ready to install right out of the box
  • Time saver – eliminates frustrating, unpredictable work required to replace bearings without damaging other components
  • Simpler solution – eliminates the need to use potentially dangerous shop press to perform complete bearing repair
  • Quality tested – this part has undergone try-on, corrosion and material testing to ensure a quality fit and long service life
See More

Dorman – Rear Axle Shaft (Part No.630-340A)

Rear Axle Shaft

from

$123.99
Axle shaft damaged or bearings worn out: This axle shaft directly replaces the original equipment on certain vehicles, complete with all necessary application-specific installation components.

Product Features:


Product Features:
  • Direct replacement – this axle shaft replaces the original equipment on specific vehicle years, makes and models
  • Complete kit – each shaft includes critical installation hardware and components needed for specific vehicle applications
  • Durable construction – designed to rigorous standards and tested to ensure performance
  • Trustworthy solution – backed by team of engineers and quality control specialists in the United States
See More

Best-Selling 2003 Toyota Tundra Differential Oil

Upgrade your Tundra with one of our 9 best-selling Differential Oil, earning an average 5 stars rating across 947 reviews.

Mobil 1 – 75W-90 Full Synthetic Gear Lubricant, Extends Gear Life, 1 Quart (Part No.26101)

75W-90 Full Synthetic Gear Lubricant, Extends Gear Life, 1 Quart

from

$19.99
Mobil 1 Synthetic Gear Lubricant LS 75W-90 is a supreme, multi-purpose automotive gear lubricant that helps to provide exceptional thermal stability and resistance to high temperature oxidation, extending gear life due to minimal deposits. Helps to deliver outstanding protection against low speed/high torque wear with the capability to handle severe driving conditions while delivering smooth efficient performance. Mobil 1 Synthetic Gear Lubricant LS provides exceptional shear stability, corrosion protection, and enhanced frictional properties. Compared to conventional hypoid gear lubricants, Mobil 1 LS 75W-90 performs exceptionally over a wide range of temperatures to reduce wear at start up. Mobil 1 gear lube helps to minimize leakage and reduce contamination while providing good resistance to foaming to maintain film strength for reliable lubrication. Meets or exceeds the requirements of the following industry specifications: API GL-5.

Product Features:
  • Mobil 1 LS synthetic automotive gear lubricant exceeds the highest level of performance requirements of modern passenger vehicles
  • Helps to provide exceptional thermal stability and resistance to high temperature oxidation and extend gear life due to minimal deposits
  • Delivers outstanding protection against low speed/high torque wear, handling severe driving conditions with smooth, efficient performance
  • Compared to conventional hypoid gear lubricants, performs exceptionally over a wide range of temperatures to reduce wear at start up
  • Provides exceptional shear stability, corrosion protection, and enhanced frictional properties
  • Manufacturer Part Number: 104361
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Royal Purple – High Performance 5W-30 Synthetic Engine Oil, Better Wear Protection, 5 Quart (Part No.51530)

High Performance 5W-30 Synthetic Engine Oil, Better Wear Protection, 5 Quart

from

$41.99
Royal Purple Motor Oil is a specially formulated multi viscocity oil for use in gasoline and diesel engines of all types from cars and trucks to SUVs, motorcycles and boats. Royal Purple(R) Motor Oil with Synerlec(R) additive technology reduces friction, which results in a 1-3 percent increase in horsepower, lowers operating temperatures, provides superior corrosion protection, improves fuel economy, reduces emissions and extends oil life. A.P.I. Certified.

Product Features:
  • Better wear protection
  • Increased fuel efficiency
  • Better protection of the expensive catalytic emission system
  • Improved compatibility with fuels containing ethanol
  • Superior corrosion protection
  • Meets ILSAC GF-5 and Dexos1 performance requirements
See More

Valvoline – DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.822405)

DEXRON - VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart

from

$14.49
Valvoline DEXRON-VI/MERCON LV ATF is a full-synthetic transmission fluid formulated with advanced additive technology to meet and exceed the requirements of the General Motors DEXRON-VI specification. It is officially licensed and approved by GM and is fully back-serviceable and can be used wherever DEXRON-II and/or DEXRON-III are recommended. Recommended for use in the following applications: DEXRON-VI, DEXRON-III, DEXRON-II, and Allison C-4.

Product Features:
  • Formulated with full-synthetic base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
  • Enhanced anti-shudder protection for smooth shifting and maximum power transfer
  • Developed with anti-wear technology to help improve transmission durability
  • Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures
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Valvoline – SynPower Transmission & Differential Gear Oil: Full Synthetic 75W-140, 1 Gallon (Part No.887344)

SynPower Transmission & Differential Gear Oil: Full Synthetic 75W-140, 1 Gallon

from

$69.99
Valvoline SAE 75W-140 Full Synthetic Gear Oil provides the ultimate gear protection in hypoid rear differentials and non-synchronized manual transmissions. Engineered to outperform, our formulation provides exceptional high and low temperature protection and excellent thermal stability, especially in demanding driving situations such as towing and off-roading. It contains an extreme pressure additive for better load carrying capacity and wear resistance, a limited slip additive for optimal clutch pack performance, and an anti-foaming agent for better lubrication and service life. It’s recommended for conventional rear axles and transmissions requiring EP gear lubes under high speed, high load, high torque and high horsepower conditions.

Product Features:
  • EXCEPTIONAL HIGH AND LOW TEMPERATURE PROTECTION ranging from -22F to 390F degrees
  • REDUCES CHATTERING AND PROTECTS GEAR TEETH from oxidation, rust, and wear
  • FIGHTS CORROSION AND RUST with emulsifying agents and safeguards against impurities, oxidation and thermal breakdown
  • MEETS THE DEMANDS OF CONVENTIONAL AND LIMITED SLIP REAR DIFFERENTIALS where API GL-5 is specified, as well as non-synchronized manual transmissions that require API GL-4
  • MEETS OR EXCEEDS PERFORMANCE REQUIREMENTS for Ford M2C-192A, GM 12346140, Chrysler MS-8985 and API GL-5
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Valvoline – DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart (Part No.798153)

DEX/MERC ATF Conventional Automatic Transmission Fluid, 1 Quart

from

$11.99
Valvoline DEX/MERC ATF is a high-quality transmission fluid formulated to meet the challenging demands of many automatic transmissions. Its responsive low-temperature fluidity is beneficial in both electronic and hydraulic controlled transmissions and transaxles. Recommended for use in the following applications: MERCON*, DEXRON*-III, Ford M2C138-CJ and M2C166-H, Allison C-4 and TES-389, and Caterpillar TO-2.

Product Features:
  • Formulated with premium base stocks and advanced additive technology to meet the challenging demands of automatic transmissions
  • Enhanced anti-shudder protection for smooth shifting and maximum power transfer
  • Developed with anti-wear technology to help improve transmission durability
  • Engineered with a proprietary blend of base oils and advanced additives to provide better oil flow at low temperatures and greater film protection at higher temperatures
See More

Valvoline – Flex Fill Transmission & Differential Gear Oil: Full Synthetic 75W-90, 1 Quart (Part No.889785)

Flex Fill Transmission & Differential Gear Oil: Full Synthetic 75W-90, 1 Quart

from

$18.99
We’ve squeezed innovation into every ounce of Valvoline FlexFill SAE 75W-90 Full Synthetic Gear Oil, the ultimate gear protection in hypoid rear differentials and non-synchronized manual transmissions. Our unique new flexible pouch makes getting into the tightest places to lubricate gears easier than ever and with less waste. The superior detergent package-based formulation contains fully synthetic basestocks and special additives that help protect parts from rust and corrosion while providing exceptional high and low temperature protection and excellent thermal stability, especially in demanding driving situations such as towing and off-roading. It contains an extreme pressure additive for better load carrying capacity, wear resistance additives that assist in protecting gear teeth, a limited slip additive for optimal clutch pack performance, and an anti-foaming agent for better lubrication and service life. Valvoline FlexFill SAE 75W-90 Full Synthetic Gear Oil is recommended for use in axle applications requiring factory-fill or drain-and-fill levels for limited slip performance.

Product Features:
  • FLEXIBLE POUCH FOR EASIER USE WITH LESS WASTE in tight, hard to reach undercarriage situations.
  • EXCEPTIONAL HIGH AND LOW TEMPERATURE PROTECTION ranging from -30F to 300F degrees for dependable coverage year-round
  • REDUCES CHATTERING AND PROTECTS GEAR TEETH from oxidation, rust, and wear
  • MEETS THE DEMANDS OF CONVENTIONAL AND LIMITED SLIP REAR DIFFERENTIALS where API GL-5 is specified, as well as non-synchronized manual transmissions that require API GL-4 or MT-1 fluid
  • MEETS OR EXCEEDS PERFORMANCE REQUIREMENTS for Mack GO-H and GO-J; API GL-5 and API MT-1; MIL-PRF-2105E; and SAE J2360
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Yukon Gear – Redline Synthetic "Shock Proof" Oil With Positraction Additive – 4 Quarts (Part No.15005)

Redline Synthetic "Shock Proof" Oil With Positraction Additive - 4 Quarts

from

$148.99
Redline Synthetic “Shock Proof” Oil with positraction Additive. 4 Quarts.

Product Features:
  • Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive
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Yukon Gear – Redline Synthetic "Shock Proof" Oil – 3 Quarts (Part No.15000)

Redline Synthetic "Shock Proof" Oil - 3 Quarts

from

$99.99
Redline Synthetic “Shock Proof” Oil. 3 Quarts.

Product Features:
  • Includes three quarts of Redline Shockproof oil
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Yukon Gear – Redline Synthetic "Shock Proof" Oil – 4 Quarts (Part No.15004)

Redline Synthetic "Shock Proof" Oil - 4 Quarts

from

$137.99
Redline Synthetic “Shock Proof” Oil. 4 Quarts.

Product Features:
  • Includes four quarts of Redline Shockproof oil
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Top-Quality Differential Ring Gear Bolts for 2003 Toyota Tundras

Choose a high-quality OEM or aftermarket Differential Ring Gear Bolt for Toyota Tundras and enjoy top-notch performance from $6.99.

Yukon Gear – Ring Gear Bolt For Toyota T100, Tacoma & 8" IFS Front (Part No.33059)

Ring Gear Bolt For Toyota T100, Tacoma & 8" IFS Front

from

$15.99
Ring Gear bolt for Toyota T100, Tacoma & 8″ IFS front. 12mm x 1.0.

Product Features:
  • Ring gear bolt for Toyota T100 and Tacoma rear without factory locking differential and Toyota Clamshell front
  • 12mm x 1.0
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Yukon Gear – Toyota 7.5", 8", & V6 Ring Gear Bolt Retainer Plate (Part No.33061)

Toyota 7.5", 8", & V6 Ring Gear Bolt Retainer Plate

from

$6.99
Toyota 7.5″, 8″, & V6 ring gear bolt retainer plate (5 needed).

Product Features:
  • Ring gear bolt retainer plate for Toyota 7.5″ 8″ and 8″ V6
  • 5 needed
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Yukon Gear – Ring Gear Bolt (Part No.33060)

Ring Gear Bolt

from

$6.99
Ring Gear bolt for Toyota 7.5″, 8″, V6, Landcruiser reverse front & T100/Tacoma w/ factory locker. 11mm x 1.0.

Product Features:
  • Ring gear bolt for Toyota 7.5″, 8″, 8″ V6, Landrcuiser reverse rotation front and T100 and Tacoma rear with factory locking differential
  • 11mm x 1.0
See More

Top Picks for 2003 Toyota Tundra Differential Pinion Seals

Invest in one of our 5 durable Differential Pinion Seals for your 2003 Toyota, knowing you’re getting trusted brands and expert craftsmanship.

Motive Gear – Pinion Seal (Part No.1177)

Pinion Seal

from

$13.49
Motive Gear offers some of the toughest drive train components on the market today. If you are looking for the largest line of performance ring and pinion gear options available with gear sets in a wide range of ratios for nearly every application, both on and off-road, check out Motive Gear. Motive Gear products can be found in the winner’s circle at racing events worldwide. The superior quality of Motive Gear components is the result of years of racing development, outstanding design and state-of-the-art manufacturing methods. Extensive testing is performed on all products by our in-house engineers.
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Yukon Gear – Pinion Seal For Toyota 7.5", 8", V6 & T100 (Part No.30005)

Pinion Seal For Toyota 7.5", 8", V6 & T100

from

$19.99
Pinion seal for 7.5″, 8″, V6, and T100 and Tacoma with lockers.Yukon Mighty seal.

Product Features:
  • Pinion seal
  • Fits Toyota 7.5″, 8″ with 4 cylinder engine, V6, Landcruiser and Tacoma/T100 with factory locking differential
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National – Multi Purpose Seal (Part No.710823)

Multi Purpose Seal

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$13.79
National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.

Product Features:
  • Low swell in hydrocarbon fluids
  • Design type: spring loaded; multi-lip
  • Provides good low temperature capability
  • Temperature range: -40°F to 225°F; -40°C to 107°C
  • Delivers quality and reliable performance for every type of repair
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Yukon Gear – Toyota V6, T100 Pinion Seal With Factory Elec – Locker & Factory Yoke (Part No.30336)

Toyota V6, T100 Pinion Seal With Factory Elec - Locker & Factory Yoke

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$92.99
Toyota V6, T100 pinion seal w/factory elec. locker & factory yoke (OE replacement ONLY).Yukon Mighty seal.

Product Features:
  • Pinion seal
  • Fits toyota Tacoma and T100 with factory locker and Toyota V6
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Yukon Gear – Tacoma (With Out Factory Locker) & T100 (With Out Factory Locker) Pinion Seal (Part No.30331)

Tacoma (With Out Factory Locker) & T100 (With Out Factory Locker) Pinion Seal

from

$24.99
Tacoma (w/out factory locker) & T100 (w/out factory locker) pinion seal.Yukon Mighty seal.

Product Features:
  • Pinion seal
  • Fits toyota Tacoma and T100 without factory locker
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Our Differential Covers for 2003 Toyota Tundras

Make a smart move for your 2003 Toyota Tundra with our Differential Cover for $125.99.

Dorman – Differential Cover (OE Fix) (Part No.926-958)

Differential Cover (OE Fix)

from

$125.99
When the thin-gauge steel corrodes on Sequoia, Tacoma, Tundra truck rear differential covers, the typical solution has been to replace the entire axle. This Dorman OE FIX weld-on solution allows direct replacement of only the failed cover.

Product Features:
  • Direct replacement – this weld-on differential cover directly replaces a corroded original cover on certain Sequoia, Tacoma and Tundra trucks
  • Cost-effective repair – rather than buy a new axle, cut off the old cover and weld on this new one
  • Greater durability – constructed from heavier-gauge stamped steel than the original cover
  • Ready to install – pre-primed in weldable primer for a clean installation
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Top-Rated Differential Brands For Your 2003 Toyota Tundra

When it comes to finding the perfect Differential for your 2003 Toyota Tundra, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 10 trusted brands. We carry the most popular Differential brands including Valvoline, Royal Purple, and National, and more, all known for their exceptional customer ratings (average brand rating of 4.8 stars) and competitive prices, as low as $14.49. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 2003 Toyota Tundra, providing peace of mind with parts that meet or exceed OEM standards.

Popular Valvoline 2003 Toyota Tundra Differentials

If you’re looking for a top-quality Differential for your 2003 Toyota Tundra, Advance Auto Parts has exactly what you need with our selection of Valvoline Differentials. We have 2 Valvoline Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $14.49 and an average cost of $42.24, you’ll find the perfect Differential for your needs and budget. Valvoline Differentials for the 2003 Toyota Tundra come highly rated, with over 366 customer reviews and an impressive average rating of 4.8 stars. Choosing a Valvoline Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
DEXRON - VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart
from $14.49
(2)
DEXRON – VI ATF Full Synthetic Automatic Transmission Fluid, 1 Quart
“I’ve used this in my 2005 2500HD since I bought the truck with 20k on it now at 280k changed every other year maybe 40k I’d put on in two years, I pu”

Top-Quality Royal Purple 2003 Toyota Tundra Differentials

For those in search of a high-quality Differential for their 2003 Toyota Tundra, Advance Auto Parts offers a great selection of Royal Purple Differentials. With 1 Royal Purple Differentials in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Differentials start at just $41.99, giving you a range of options to suit your budget. Backed by over 133 customer ratings and an average rating of 4.8 stars, Royal Purple Differentials provide both reliability and excellent performance. Choosing a Royal Purple Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.

FAQs for 2003 Toyota Tundra Differentials

What are the best-selling Differentials for 2003 Toyota Tundras?

Out of 94 Differentials that fit 2003 Toyota Tundras, the following parts are the top sellers:

What’s the price range for 2003 Toyota Tundra Differentials?

The prices of Differentials for the 2003 Toyota Tundra range from $5.99 up to $883.99 for the most premium parts.

What is the average price of a Differential for a 2003 Toyota Tundra?

The average price for Differentials for the 2003 Toyota Tundra is $240.84. Keep in mind the variety of part types within our Differential category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Differentials for other Toyota Tundra model years?

Yes, we carry Differentials for 24 model years of Toyota Tundras between 2000 and 2025. The following model years are the most popular for Differential purchases: 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015, and 2014.

What are the cheapest Differentials for my 2003 Toyota Tundra?

The cheapest 2003 Toyota Tundra Differentials we carry are:

Does Advance Auto Parts sell Differentials for any other 2003 Toyota models?

Yes. We stock Differentials for 15 other popular 2003 Toyota models. Some of the most popular are 2003 Corolla Differentials, 2003 4Runner Differentials, 2003 Camry Differentials, 2003 Land Cruiser Differentials, and 2003 Celica Differentials.

What are the top-rated Differentials that fit the 2003 Toyota Tundra?

The one 2003 Toyota Tundra Differential we have in stock is the Differential Crush Sleeve. It costs $5.99.

What types of Differentials do you sell for my 2003 Toyota Tundra?

As of 11/2/25, these are some of the most in-demand types of Differentials for a 2003 Toyota Tundra:

Can I get help with 2003 Toyota Tundra Differential orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Toyota Differentials and more.

What is your return policy for Toyota Tundra Differentials?

Advance Auto Parts keeps returns simple. For new Toyota Tundra Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.