1985 GMC G1500 Differentials

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Keep Your 1985 GMC G1500 in Top Shape with Quality Differentials

Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1985 GMC G1500 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Rear Differential Cover Gaskets, Differential Pinion Seals, and Differential Covers. 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 Motive Gear, Dorman, and National. For example, Motive Gear Differentials start at just $7.99 with an average 4.0 star rating. Dorman and National offer similar pricing and quality, backed by strong customer feedback. With over 4,254 reviews and a solid 4 star average, you can shop with confidence knowing other GMC G1500 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1985 GMC G1500 Differential at Advance Auto Parts is around $227.77, with a range that starts at $2.59 and goes up to $1,969.99. With 284 options in stock from 15 trusted brands, finding the right fit is easy. Popular picks like Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket, 3 Qt – 80W90 Conventional Gear Oil with Posi Additive, and Tapered Roller Bearing Cone start at just $10.99 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 Drive Shafts and Axles and Universal Joints. At Advance Auto Parts, we’re here to help you keep your 1985 GMC G1500 in peak condition, inside and out.

Essential 1985 GMC G1500 Differentials

Yukon Gear – Pinion Nut washer (Part No.33166)

Pinion Nut washer

from

$23.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.

Product Features:
  • Pinion nut washer for GM 12 bolt car and truck, 1955-1964 GM car and truck, GM 8.2″ and 1963-1979 Corvette.
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Yukon Gear – Standard Open Cross Pin (0.795" Diameter) for 8.5" GM – Some Eaton Positractions (Part No.33401)

Standard Open Cross Pin (0.795" Diameter) for 8.5" GM - Some Eaton Positractions

from

$49.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.

Product Features:
  • Cross pin shaft for GM 8.5″ and 8.6″
  • Fits standard open differentials only
  • 0.795″ diameter
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Yukon Gear – Bearing Race Driver for Popular Ford, Gm, Chrysler, and Dana Differentials (Part No.56017)

Bearing Race Driver for Popular Ford, Gm, Chrysler, and Dana Differentials

from

$215.99
Yukon Gear & Axle offers a full line of top quality differential tools to save time and money.

Product Features:
  • Fits HM89410 race
  • For accurate installation of bearing races
  • All-steel construction
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Dorman – Differential Pinion Yoke Assembly (Part No.697-553)

Differential Pinion Yoke Assembly

from

$242.99
Worn or damaged differential end yoke causing driveline Vibrations- This direct replacement end yoke matches the original equipment part for a trustworthy repair and reliable performance.

Product Features:
  • Direct replacement – this differential end yoke matches the fit and construction of the original yoke
  • Excellent value – this replacement end yoke offers original equipment quality at a fraction of the price of dealer parts
  • Quality materials – this end yoke is machined from cast iron for strength and is precision machined for reliability
  • Validated fit – this differential end yoke has been tested to confirm accurate fit
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Yukon Gear – Dura Grip Spider Gear Set for GM 8.5" Differential with 28 Spline Axles (Part No.16052)

Dura Grip Spider Gear Set for GM 8.5" Differential with 28 Spline Axles

from

$336.99
Yukon Gear & Axle spider gear kits utilize the highest quality materials and best production techniques in the industry to ensure a longer lasting spider gear set. Kit delivers everything needed for a complete and proper spider gear set replacement.

Product Features:
  • Fits GM 8.5″ differential outfitted with Dura Grip positraction
  • 28 spline axles
  • Includes two side gears, two pinion gears, cross pin shaft, roll pin and spider gear thrust washers
  • Does not include clutches
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Yukon Gear – Super Carrier Shim Kit for Ford 7.5", GM 7.5", 8.2" & 8.5 (Part No.55001)

Super Carrier Shim Kit for Ford 7.5", GM 7.5", 8.2" & 8.5

from

$59.99
Yukon shim kits are precision machined and tailored for each individual application to ensure you have the right shims for every set up.

Product Features:
  • Super carrier shim kit for Ford 7.5″, GM 7.5″, 7.625″, 7.6″ IFS, 7.6″ IRS, 7.75″, 8.2″, 8.2″ Buick, Oldsmobile and Pontiac and GM 8.5″ front and rear
  • Interlocking design makes installation much easier
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Yukon Gear – Ltd. Slip Clutch Guide, Chry 9.25/Dana 44/50/GM 12 Bolt/8.2"/8.5"/8.6"/Nis M226 (Part No.33352)

Ltd. Slip Clutch Guide, Chry 9.25/Dana 44/50/GM 12 Bolt/8.2"/8.5"/8.6"/Nis M226

from

$8.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.

Product Features:
  • Clutch guide for Chrysler 9.25″, Dana Spicer 44, Dana Spicer 50, Ford 8.8″, GM 12 bolt passenger car, GM 8.2″, 8.5″ and 8.6″, 1963-1979 Corvette and Nissan Titan
  • Compatible with Dura Grip positractions only
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Powertrax – Grip LS Traction System (Part No.LS201030)

Grip LS Traction System

from

$503.99
For vehicles that are driven daily, the Powertrax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Powertrax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Powertrax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Powertrax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds!
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Yukon Gear – Standard Open Carrier Case, GM 8.5", 2.73 & Up (Part No.20083)

Standard Open Carrier Case, GM 8.5", 2.73 & Up

from

$239.99
8.5″ GM standard Open case, 2.73 & up, 28 or 30 spline.

Product Features:
  • Standard open carrier case
  • Fits GM 8.5″ with 28 or 30 spline axles
  • 2.73 and up ratio only
  • Does not include spider gears
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Yukon Gear – Steel Spool for GM 12 Bolt Truck with 30 Spline Axles, 3.73 & Up (Part No.32190)

Steel Spool for GM 12 Bolt Truck with 30 Spline Axles, 3.73 & Up

from

$454.99
Yukon Mini Spools are a low-cost traction option for vehicles looking for full-time lockup. The mini spool installs into a standard open carrier and delivers 100% power to both tires at all times. These units are not recommended for street-driven vehicles. Full spools are recommended for vehicles with large tires or high horsepower.

Product Features:
  • Fits GM 12 bolt truck with 30 spline axles
  • 3.73 and up ratio only
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
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Powertrax – Differential Lock Assembly (Part No.9207883005)

Differential Lock Assembly

from

$551.99
For vehicles that are driven daily, the Power Trax No-Slip Traction System is the latest design in quiet traction-adding differential technology. It combines the automatic street-friendly smooth operation of a limited-slip differential with the traction performance of a locking differential. The Power Trax No-Slip locker easily installs in to your differential carrier using basic tools and without affecting your ring and pinion settings. Power Trax Grip-Lok, Lock-Right Lockers and No-Slip Traction Systems automatically provide 100% traction on-demand, under the toughest circumstances. The Power Trax Grip-Pro and Grip-LS performance limited slips offer smooth dependable torque transfer and traction for the best of both worlds.

Product Features:
  • The Power Trax Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Power Trax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
  • Power Trax lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
  • Power Trax offers three levels of GRIP locking differentials, ranging from the clutch-type GRIP LS with a forged steel case, the gear-driven GRIP PRO and finally the GRIP LOK for extreme traction.
  • Power Trax ia an Extreme Traction System
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Yukon Gear – 10.5" GM 14 Bolt Truck Pinion Nut (Part No.33148)

10.5" GM 14 Bolt Truck Pinion Nut

from

$48.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.

Product Features:
  • Pinion nut for GM 10.5″ 14 bolt truck
  • 15/16″ x 16 thread
  • 1.5″ socket
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Pro-King – Differential Cross Shaft (Part No.742G673)

Differential Cross Shaft

from

$28.49
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:
  • Meets or exceeds OE specifications
See More

USA Standard Gear – Ring & Pinion Gear Set For 10.5" GM 14 Bolt Truck In A 4.11 Ratio (Part No.36183)

Ring & Pinion Gear Set For 10.5" GM 14 Bolt Truck In A 4.11 Ratio

from

$389.99
USA Standard ring & pinion sets are the right choice to add confidence to your install. USA Standard Gear offers a full line of ring & pinion sets for a variety of common & hard to find applications. USA standard gear offers a standard one year warranty against defects on their ring & pinion sets.

Product Features:
  • Fits GM 10.5″ GM 14 bolt truck
  • 10.50″ ring gear diameter
  • 30 spline pinion
  • 12 ring gear bolts
  • 4.11 ratio
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Pro-King – Differential Cover Plug (Part No.742G484)

Differential Cover Plug

from

$6.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:
  • Meets or exceeds OE specifications
See More

Schaeffler – Shaft Seal (Part No.SS2983)

Shaft Seal

from

$9.99
Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Yukon Gear – 14T GM Pinion Support Bolt, 7/16-14" Long (Part No.33582)

14T GM Pinion Support Bolt, 7/16-14" Long

from

$5.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.
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Motive Gear – Differential Carrier Shim Kit (Part No.1101)

Differential Carrier Shim Kit

from

$8.99
High-quality Differential Carrier Shim Kit

Product Features:
  • CARRIER SHIMS 12 BOLT GM CAR & TRUCK ALSO GM8.6″ 99-ON
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Yukon Gear – Dura Grip Positraction For GM 12 Bolt Truck With 30 Spline Axles, 3.73 & Up (Part No.26035)

Dura Grip Positraction For GM 12 Bolt Truck With 30 Spline Axles, 3.73 & Up

from

$859.99
The Yukon Dura Grip provides aggressive yet smooth traction to give you the confidence & performance you need. Get longer life and better traction with the heavy duty Yukon Dura Grip Positraction. The Yukon Dura Grip uses a nodular case and forged 4320 internals for added strength along with composite clutches for high performance and long life. All units are Rebuildable and many offer upgrades to increase aggressiveness for racing applications. Each unit carries a one year warranty against defects.

Product Features:
  • Fits GM 12 bolt truck with 30 spline axles
  • 3.73 and up ratio only
  • 4-spring, clutch style positraction
  • Internal gears are manufactured using forged 4320 steel and cut to provide stronger teeth
  • Fully rebuildable
  • Assembled in the USA
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Pro-King – Differential Cross Shaft (Part No.742G930)

Differential Cross Shaft

from

$2.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:
  • Meets or exceeds OE specifications
See More

Yukon Gear – 10.5" GM 14 Bolt Truck Ring Gear Bolt (Part No.33051)

10.5" GM 14 Bolt Truck Ring Gear Bolt

from

$10.99
14T ring gear bolt 4.11 & down. 9/16″ x 18. 2.085″ overall length.

Product Features:
  • Ring gear bolt for GM 10.5″ 14 bolt truck
  • 4.11 and down ratio
  • 1/2″ x 18 thread
  • 2.085″ overall length
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USA Standard Gear – Differential Rebuild Kit (Part No.37043)

Differential Rebuild Kit

from

$194.99
USA Standard Master Overhaul kits let you finish your install with confidence. 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), threading locking compound, marking compound with brush and gasket.

Product Features:
  • Fits GM 12 bolt truck
  • 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, thread locker, marking compound with brush and gasket.
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Yukon Gear – Pinion Install Kit for ’88 and Older 10.5" GM 14 Bolt Truck Differential (Part No.13058)

Pinion Install Kit for '88 and Older 10.5" GM 14 Bolt Truck Differential

from

$349.99
Yukon Pinion Installation Kits are a terrific solution for gear installation on lower mileage vehicles where the carrier bearings and races can be reused. This kit features Timken bearings and races along with high-quality seals and small parts. Yukon does extensive research for each application to make sure your kit will arrive with all the correct parts you need to install your gear set.

Product Features:
  • Fits 1988 and down GM 10.5″ 14 bolt truck
  • Included are pinion bearings and races, pinion seal, crush sleeve, complete pinion shim kit, and marking compound with brush.
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Yukon Gear – Pinion Nut washer (Part No.33167)

Pinion Nut washer

from

$14.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.

Product Features:
  • Pinion nut washer for GM 7.2″ IFS, 7.5″, 7.625″, 7.6″ IFS, 8.5″, 8.6″ and 9.5″.
See More

Pro-King – Differential Crush Sleeve (Part No.742G034)

Differential Crush Sleeve

from

$2.99
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:
  • Meets or exceeds OE specifications
See More

Yukon Gear – Carrier Installation Kit for GM 8.5" Differential with HD Bearings (Part No.57009)

Carrier Installation Kit for GM 8.5" Differential with HD Bearings

from

$148.99
Yukon Carrier Installation Kits are a convenient and low-cost solution for carrier changes in cases where one is upgrading to a positraction limited slip differential, a mechanical locker, or an air operated locker. These kits contain carrier bearings and races and a carrier shim kit.

Product Features:
  • Fits GM 8.5″ with aftermarket positraction
  • Works with Heavy Duty Bearings
  • Includes carrier bearings and races and “super” carrier shim kit
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Yukon Gear – Steel Cover for GM 10.5" 14 Bolt Truck (Part No.32345)

Steel Cover for GM 10.5" 14 Bolt Truck

from

$92.99
These Yukon replacement diff covers are a direct bolt-on.

Product Features:
  • Fits GM 10.5″ 14 bolt truck
  • Steel
See More

Dorman – Differential Cover (Part No.697-700)

Differential Cover

from

$37.99
This direct replacement differential cover matches the fit and function of the original equipment diff cover for a reliable, leak-free repair. It features a durable design, made to strict specifications, to help ensure reliable service life.

Product Features:
  • Direct replacement – this differential cover matches the fit and function of the original equipment diff cover on select vehicles
  • Reliable repair – the smart solution for fixing an existing cover that’s rusted, damaged or leaking differential fluid
  • Durable construction – this differential cover is made according to strict engineering standards to help ensure dependability
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Most Popular Rear Differential Cover Gaskets for 1985 GMC G1500s

Enhance your 1985 GMC G1500 with one of the 6 Rear Differential Cover Gaskets we have in stock, starting at just $10.99.

Felpro – Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket (Part No.RDS 55028-1)

Axle Housing Cover Gasket Oval Shaped 10 Bolt Hole Gasket

from

$10.99
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 – GM 10.5′ 14 Bolt Truck Cover Gasket (Part No.23016)

GM 10.5' 14 Bolt Truck Cover Gasket

from

$13.99
14T cover gasket.

Product Features:
  • Cover gasket
  • Fits GM 10.5″ 14 bolt truck
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Spicer – Performance Differential Gasket – Gm 10.5 Axle – 14 Bolt (Part No.RD51995)

Performance Differential Gasket - Gm 10.5 Axle - 14 Bolt

from

$34.99
Spicer performance differential cover gaskets offer all-makes coverage for street, strip, drag, and off-road applications. These gaskets are reusable offering a clean release during replacement. Built with a mechanically and chemically bonder woven steel.

Product Features:
  • Made to adhere without messy RTV sealant This saves on install time by eliminating the time needed for RTV cure.
  • Provides no re-torque design with maximum compression and sealing.
  • Manufactured with proprietary high-density performance material.
  • Made in the USA.
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Pro-King – Differential Cover Gasket (Part No.742G303A)

Differential Cover Gasket

from

$31.49
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:
  • Meets or exceeds OE specifications
See More

Yukon Gear – GM 12 Bolt Truck Cover Gasket (Part No.23015)

GM 12 Bolt Truck Cover Gasket

from

$12.99
12T cover gasket.

Product Features:
  • Cover gasket
  • Fits GM 12 bolt truck
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Yukon Gear – 8.2" & 8.5" Rear Cover Gasket (Part No.23020)

8.2" & 8.5" Rear Cover Gasket

from

$10.99
8.2″ & 8.5″ rear cover gasket.

Product Features:
  • Cover gasket
  • Fits GM 8.2″, 8.5″ and 8.6″
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Best-Selling 1985 GMC G1500 Differential Pinion Seals

Upgrade your G1500 with one of our 3 best-selling Differential Pinion Seals.

Yukon Gear – Pinion Seal for GM 14T (Part No.30023)

Pinion Seal for GM 14T

from

$19.99
Yukon Mighty Seals use the latest design and manufacturing technologies to produce a precision fit that seals tight and lasts for years to come.

Product Features:
  • Pinion seal
  • Fits 1998 and down GM 10.5″ 14 bolt truck
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Schaeffler – Shaft Seal (Part No.SS2987)

Shaft Seal

from

$16.99
Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Schaeffler – Shaft Seal (Part No.SS2983)

Shaft Seal

from

$9.99
Our wheel seals are engineered using only the highest-quality materials to meet vehicle manufacturer specificatons. We work with suppliers to design seals that meet FAG’s quality standards. Seals are designed to protect wheel end components from contamination – such as dirt, dust, and moisture – and prevent the loss of grease over the life of the bearing. The specifications for wheel seals are very demanding, and the type required depends on the specific application, position and vehicle class.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Top-Quality Differential Covers for 1985 GMC G1500s

Choose a high-quality OEM or aftermarket Differential Cover for GMC G1500s and enjoy top-notch performance from $35.99.

Dorman – Differential Cover (Part No.697-700)

Differential Cover

from

$37.99
This direct replacement differential cover matches the fit and function of the original equipment diff cover for a reliable, leak-free repair. It features a durable design, made to strict specifications, to help ensure reliable service life.

Product Features:
  • Direct replacement – this differential cover matches the fit and function of the original equipment diff cover on select vehicles
  • Reliable repair – the smart solution for fixing an existing cover that’s rusted, damaged or leaking differential fluid
  • Durable construction – this differential cover is made according to strict engineering standards to help ensure dependability
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Yukon Gear – Chrome Cover for 8.6", 8.5" and 8.2" GM Rear (Part No.32017)

Chrome Cover for 8.6", 8.5" and 8.2" GM Rear

from

$74.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design finished in chrome.

Product Features:
  • Fits GM 8.2″, 8.5″ and 8.6″
  • Chrome
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Yukon Gear – Polished Aluminum Cover for 8.6", 8.2" and 8.5" GM Rear (Part No.32030)

Polished Aluminum Cover for 8.6", 8.2" and 8.5" GM Rear

from

$255.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design made from aluminum and polished to perfection.

Product Features:
  • Fits GM 8.5″ and 8.6″
  • Finned polished aluminum
See More

Yukon Gear – Steel Cover for GM 8.2" & 8.5" Rear (Part No.32332)

Steel Cover for GM 8.2" & 8.5" Rear

from

$123.99
These Yukon replacement diff covers are a direct bolt-on.

Product Features:
  • Fits GM 8.2″, 8.5″ and 8.6″
  • Steel
See More

Yukon Gear – Steel Cover for GM 10.5" 14 Bolt Truck (Part No.32345)

Steel Cover for GM 10.5" 14 Bolt Truck

from

$92.99
These Yukon replacement diff covers are a direct bolt-on.

Product Features:
  • Fits GM 10.5″ 14 bolt truck
  • Steel
See More

Yukon Gear – Chrome Cover for 10.5" GM 14 Bolt Truck (Part No.32013)

Chrome Cover for 10.5" GM 14 Bolt Truck

from

$59.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design finished in chrome.

Product Features:
  • Fits GM 10.5″ 14 bolt truck
  • Chrome
See More

Yukon Gear – Chrome Cover for GM 12 Bolt Truck (Part No.32012)

Chrome Cover for GM 12 Bolt Truck

from

$64.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design finished in chrome.

Product Features:
  • Fits GM 12 bolt truck
  • Chrome
See More

Yukon Gear – Polished Aluminum Cover for GM 12 Bolt Truck (Part No.32027)

Polished Aluminum Cover for GM 12 Bolt Truck

from

$269.99
These Yukon replacement diff covers take your rig a step beyond the boring factory look. They are the stock OE design made from aluminum and polished to perfection.

Product Features:
  • Fits GM 12 bolt truck
  • Finned polished aluminum
See More

ATP – Differential Cover Kit With Internal Magnet (Part No.111101)

Differential Cover Kit With Internal Magnet

from

$35.99
Differential covers can become damaged from road debris, corrosion, or bolt/drain plug over tightening. Their job is to act as a lid keeping lubricants in place for the ring and pinion gears, bearings, and bushings. Without lubricants, the differential quickly become damaged. ATP Differential Cover Kits include a replacement gasket and are designed to fit and function just like the original part ensuring long life and durability.
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Top Picks for 1985 GMC G1500 Differential Oil

Invest in one of our 6 durable Differential Oil for your 1985 GMC, knowing you’re getting trusted brands and expert craftsmanship.

Valvoline – MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart (Part No.VV324)

MaxLife Multi-Vehicle (ATF) Full Synthetic Automatic Transmission Fluid, 1 Quart

from

$12.49
Valvoline Full Synthetic MaxLife Multi-Vehicle ATF, the No. 1 ATF product, suitable for use in 95% of vehicles. And now, it’s recommended for most belt & chain-driven continuously variable transmissions (CVT). Featuring advanced additives to prevent the major causes of transmission breakdown, it’s designed to help prevent leaks, reduce wear & tear, and maximize performance. Has improved thermal stability for longer fluid life, better viscosity stability for consistent transmission operation, and frictional enhancements for smooth gear engagements. Valv MaxLife Multi-Vehicle ATF is suitable for most Ford, GM, Toyota, Honda, Nissan, Hyundai, Subaru, BMW, Mercedes, Volvo, VW & Audi vehicles. Recommended for use in: GM DEXRON-II, DEXRON-III, DEXRON-VI, and DEX-CVT; Ford MERCON LV; Toyota/Lexus Type T, T-II, T-IV, WS, CVTF FE, and CVTF TC; Honda/Acura ATF-Z1 and Honda CVT; Nissan/Infiniti Matic-D, Matic-J, Matic-K and Matic-S; Hyundai/Kia SP-II, SP-III, SP-IV and SPH-IV; BMW 7045E, ETL 8072B, LA2634 and LT71141; Allison C-4; Mercedes-Benz NAG-1; Volvo 1161521, 1161540, 97340 and 1273.41; Subaru ATF HP, Lineartronic chain CVT and CVT-II, Lineartronic High Torque CVT, and CV-30; and VW/Audi G-052-025-A2 and G-052-162-A1. CURRENTLY UNABLE TO SHIP THIS PRODUCT TO CUSTOMERS LOCATED IN CALIFORNIA

Product Features:
  • FOR USE IN 95% OF VEHICLES INCLUDING MOST CVTs in operation with US registered light duty applications
  • HIGH PERFORMANCE CONDITIONING AGENTS prolong seal elasticity to prevent leaks
  • IMPROVED DURABILITY & TRANSMISSION LIFE with anti-wear technology to avoid costly repairs
  • ENHANCED HIGH & LOW TEMP PERFORMANCE supports transmission fluid in all weather situations
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Yukon Gear – 3 Qt – 80W90 Conventional Gear Oil with Posi Additive (Part No.15003)

3 Qt - 80W90 Conventional Gear Oil with Posi Additive

from

$57.99
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials. This kit includes three quarts of oil and a bottle of Yukon Limited Slip Friction modifier that reduces noise and chatter in clutch driven positraction units and limited slip differentials.

Product Features:
  • Includes three quarts of conventional oil and one 4oz bottle of Yukon positraction additive
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Yukon Gear – 3 Qt – Penzoil 80W90 Conventional Gear Oil (Part No.15002)

3 Qt - Penzoil 80W90 Conventional Gear Oil

from

$44.99
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials.

Product Features:
  • Includes three quarts of conventional oil
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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 Heavy Shockproof Gear Oil is formulated to provide lasting protection. This kit includes four quarts of oil and a bottle of Yukon Limited Slip Friction modifier that reduces noise and chatter in clutch driven positraction units and limited slip differentials.

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 Heavy Shockproof Gear Oil is formulated to provide lasting protection.

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 Heavy Shockproof Gear Oil is formulated to provide lasting protection.

Product Features:
  • Includes four quarts of Redline Shockproof oil
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Top-Rated Differential Bearings for 1985 GMC G1500s

Make a smart move for your 1985 GMC G1500 with products all priced from $6.99 to $46.99.

National – Bearing Race (Part No.LM501314)

Bearing Race

from

$11.99
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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Driveworks – Taper Bearing Cone (Part No.S-LM-501349)

Taper Bearing Cone

from

$10.99
Value-priced bearing meets all cataloged application requirements.

Product Features:
  • Brand may vary by location
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National – Tapered Roller Bearing Cone (Part No.LM501349)

Tapered Roller Bearing Cone

from

$21.99
Manufactured with premium-grade steel, National taper bearing cones feature crowned raceways and rollers to ensure even load distribution.

Product Features:
  • PREMIUM MATERIALS – Precision manufactured using premium-grade steel for outstanding durability and performance
  • SMOOTH ROTATION – Crowned raceways and rollers 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
See More

Schaeffler – Cone (Part No.KJLM506849-A)

Cone

from

$46.99
With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Schaeffler – Bearing – CRB (Cylindrical Roller Bearing) (Part No.FC67147)

Bearing - CRB (Cylindrical Roller Bearing)

from

$30.99
We develop and produce high-quality roller bearings, spherical bearings, and plain bearings worldwide for a wide range of applications.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
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Yukon Gear – Positraction Cross Pin Bolt for GM 12 Bolt Car and Truck (Part No.33344)

Positraction Cross Pin Bolt for GM 12 Bolt Car and Truck

from

$28.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.

Product Features:
  • Cross pin bolt for GM 12 bolt passenger car and truck
  • For OEM positraction applications only
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Schaeffler – Cup (Part No.382A)

Cup

from

$18.99
With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Schaeffler – Wheel Balancer Cone (Part No.KLM104949)

Wheel Balancer Cone

from

$17.99
With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Schaeffler – Bearing – TRB (Tapered Roller Bearing) (Part No.KT5)

Bearing - TRB (Tapered Roller Bearing)

from

$14.99
With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Schaeffler – Cup (Part No.LM104911)

Cup

from

$11.99
With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Schaeffler – Cup (Part No.M88010)

Cup

from

$10.99
With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Yukon Gear – Cross Pin Bolt (Part No.33067)

Cross Pin Bolt

from

$6.99
Yukon Gear & Axle manufactures a full line of top quality small parts to complete any job including ring gear bolts, crush sleeves, pinion nuts and washers, axle studs, thrust washers and much, much more. For all your differential small parts needs, look no further than Yukon.

Product Features:
  • Cross pin bolt for Chrysler 8.25″ and 9.25″ rear, Ford 7.5″ and 8.8″, GM 12 bolt car and truck, 8.5″, 8.25″ IFS, 8.0″, 7.625″, 7.5″ and 7.2″ IFS
See More

Schaeffler – Cup (Part No.LM48510)

Cup

from

$6.99
With advanced load-carrying capacity and compact design, tapered roller bearings are used in wheel bearings, transmissions, differentials, transfer cases and other miscellanous applications. FAG manufacturers over 100 million tapered roller bearings annually.

Product Features:
  • High-precision and High-quality components used in all KITs
  • Coverage of classic and new high-tech solutions for the best system coverage
See More

Top-Rated Differential Brands For Your 1985 GMC G1500

When it comes to finding the perfect Differential for your 1985 GMC G1500, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 15 trusted brands. We carry the most popular Differential brands including National, Dorman, and Motive Gear, and more, all known for their exceptional customer ratings (average brand rating of 4.3 stars) and competitive prices, as low as $6.79. Purchasing a Differential from us here at Advance Auto Parts is a smart move for both you and your 1985 GMC G1500, providing peace of mind with parts that meet or exceed OEM standards.

Popular National 1985 GMC G1500 Differentials

If you’re looking for a top-quality Differential for your 1985 GMC G1500, Advance Auto Parts has exactly what you need with our selection of National Differentials. We have 2 National Differentials in stock for this fitment, all known for their durability and precision fit. With prices starting at just $11.99 and an average cost of $18.99, you’ll find the perfect Differential for your needs and budget. National Differentials for the 1985 GMC G1500 come highly rated, with over 9 customer reviews and an impressive average rating of 4.3 stars. Choosing a National Differential from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Bearing Race
from $11.99
(2)
Bearing Race
“Reasonable price and woks well. front diff 2006 Escalade esv”
Tapered Roller Bearing Cone
from $25.99
(7)
Tapered Roller Bearing Cone
“Good price”

Top-Quality Dorman 1985 GMC G1500 Differentials

For those in search of a high-quality Differential for their 1985 GMC G1500, Advance Auto Parts offers a great selection of Dorman Differentials. With 3 Dorman 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 $6.79, with an average price of $66.59, giving you a range of options to suit your budget. Backed by over 35 customer ratings and an average rating of 4.2 stars, Dorman Differentials provide both reliability and excellent performance. Choosing a Dorman Differential from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Differential Cover
from $37.99
(14)
Differential Cover
“Heavy steel with the original magnet. Fits like original.. Not a cheap stamping by any means”
Differential Shaft Lock Bolt
from $6.79
(11)
Differential Shaft Lock Bolt
“great”
Differential Yoke including Seal and Pinion Nut
from $154.99
(10)
Differential Yoke including Seal and Pinion Nut
“Came with everything I needed and Fit like a glove on my 2002 gmc 4.8L sierra. No more leaks from rear differential.”

FAQs for 1985 GMC G1500 Differentials

What are the best-selling Differentials for 1985 GMC G1500s?

Out of 284 Differentials that fit 1985 GMC G1500s, the following parts are the top sellers:

What’s the price range for 1985 GMC G1500 Differentials?

The prices of Differentials for the 1985 GMC G1500 range from $2.59 up to $1,969.99 for the most premium parts.

What is the average price of a Differential for a 1985 GMC G1500?

The average price for Differentials for the 1985 GMC G1500 is $227.77. 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 GMC G1500 model years?

Yes, we carry Differentials for 15 model years of GMC G1500s between 1979 and 1995. The following model years are the most popular for Differential purchases: 1995, 1994, 1993, 1992, 1991, 1990, 1989, 1988, and 1987.

What are the cheapest Differentials for my 1985 GMC G1500?

The cheapest 1985 GMC G1500 Differentials we carry are:

Does Advance Auto Parts sell Differentials for any other 1985 GMC models?

Yes. We stock Differentials for 20 other popular 1985 GMC models. Some of the most popular are 1985 Jimmy Differentials, 1985 K2500 Differentials, 1985 C2500 Differentials, 1985 K1500 Differentials, and 1985 C1500 Differentials.

What types of Differentials do you sell for my 1985 GMC G1500?

As of 6/2/26, these are some of the most in-demand types of Differentials for a 1985 GMC G1500:

Can I get help with 1985 GMC G1500 Differential orders?

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

What is your return policy for GMC G1500 Differentials?

Advance Auto Parts keeps returns simple. For new GMC G1500 Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.