1977 GMC C25 Differentials

Essential 1977 GMC C25 Differentials

Yukon Gear – Eaton Positraction Shim Kit For 10.5" GM 14 Bolt Truck (Part No.16113)

Eaton Positraction Shim Kit For 10.5" GM 14 Bolt Truck

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$78.99
Eaton positraction shim kit for GM 14T.

Product Features:
  • Shim kit
  • Fits GM 10.5″ 14 bolt truck Eaton positraction
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Dorman – Help – Differential Shaft Lock Bolt (Part No.81048)

Differential Shaft Lock Bolt

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$5.99
This differential pinion shaft lock bolt is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:
  • Direct replacement – this differential pinion shaft lock bolt matches the fit and function of the factory part on specified years, makes and models
  • Ideal solution – this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue
  • Durable construction – this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
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Pro-King – Differential Pinion Nut (Part No.744A961)

Differential Pinion Nut

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$10.49
Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

Product Features:
  • All products are designed to meet or exceed OE quality, form, fit and funtion.
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Yukon Gear – Steel Spool For GM 14 Bolt Truck With 30 Spline Axles, 4.10 & Down (Part No.32048)

Steel Spool For GM 14 Bolt Truck With 30 Spline Axles, 4.10 & Down

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$526.99
Yukon Performance steel spool for GM 14T with 30 spline axles. fits 4.10 and down. Yukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. Spools provide 100% power to both tires at all times and are a lower cost alternative to lockers. Spools are not recommended for street driven vehicles. Yukon Performance spools come with a one year warranty against manufacturing defects.

Product Features:
  • Fits GM 10.5″ 14 bolt truck with 30 spline axles
  • 4.10 and down ratio only or 4.56 and up thick gears
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
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Yukon Gear – 10.5" GM 14 Bolt Truck Crush Sleeve (Part No.33108)

10.5" GM 14 Bolt Truck Crush Sleeve

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$7.99
10.5″ GM 14 bolt truck crush sleeve, 1988 & OLDER. Approx 0.825″ long.

Product Features:
  • Crush sleeve for 1988 and down GM 10.5″ 14 bolt truck
  • 0.825″ tall
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Spectre – Differential Cover (Part No.6080)

Differential Cover

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$59.99
Spectre’s Chrome GM Differential Covers feature a 14 bolt design and include the chrome bolts and gasket needed for an easy install. Made to OEM specifications these differential covers are triple chrome plated ensuring they perform as well as they look. This product fits the following vehicles with a 9.5 inch ring gear: 1981 and up Chevy/GMC (rear), 1973-1995 Chevy/GMC 3/4 ton-1 ton 2/4 wheel drive (rear). Includes 14 SAE standard chrome bolts for installation. You’ll need to supply your own bolts if your application requires metric bolts.

Product Features:
  • Fits the following vehicles with 9.5″ ring gear: ’81-up Chevy/GMC (rear), ’73-’95 Chevy/GMC 3/4-1 ton 2/4WD (rear)
  • Triple chrome plated
  • 14 bolt design cover
  • 14 chrome 5/16 inch -18 x 3/4 inch differential cover bolts included
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Driveworks – Wheel Bearing (Part No.S-R1581-TV)

Wheel Bearing

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$27.99
Product Features:
  • Brand may vary by location
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Powertrax – Lock Right Locker (Part No.1910-LR)

Lock Right Locker

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$376.99
The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! 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!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
  • Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
  • Powertrax® 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.
  • Powertrax® = Extreme Traction Systems!
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    Powertrax – Lock Right Locker (Part No.1950-LR)

    Lock Right Locker

    from

    $487.99
    The Powertrax Lock-Right ultra-strength alloy locker’s straight-line performance is equal to a solid spool, but automatically unlocks in turns. Best suited for extreme off-road to severe on-road use, Powertrax Lock Right lockers replace the spider gears in your open differential carrier using basic tools and without affecting your ring and pinion settings. The whole job can be done in your driveway in a couple of hours, pin included! 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!

    Product Features:
    • Powertrax® proves that you don’t have to choose between the superior traction of a locking differential and smooth handling and drivability of an open differential. Powertrax Lock-Right Lockers, No-Slip Traction Systems and GRIP limited slip differentials and lockers give you the best of both worlds!
    • The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
    • Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
    • Powertrax® 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.
    • Powertrax® = Extreme Traction Systems!
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    Motive Gear – Differential Pinion Shim Kit (Part No.GM14SK)

    Differential Pinion Shim Kit

    from

    $22.99


    Product Features:
    • KIT SHIM GM 10.5 14 BLT
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    USA Standard Gear – Master Overhaul Kit for the ’88 and Older GM 10.5" 14T Differential (Part No.37044)

    Master Overhaul Kit for the '88 and Older GM 10.5" 14T Differential

    from

    $349.99
    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 1988 and down GM 10.5″ 14 bolt truck
    • Uses Koyo bearings and races
    • Included are carrier bearings and races, pinion bearings and races, pilot bearing, pinion seal, complete shim kit, pinion nut, crush sleeve, thread locker, marking compound with brush and gasket.
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    Yukon Gear – Eaton-Type Positraction Carbon Clutch Kit With 14 Plates For GM 14T And 10.5" (Part No.16112)

    Eaton-Type Positraction Carbon Clutch Kit With 14 Plates For GM 14T And 10.5"

    from

    $304.99
    Yukon 1480 Lifetime Series U/Joint. 4.188″ snap ring span, 1.375″ cap diameter. Outside snap ring.

    Product Features:
    • Clutch kit
    • Fits GM 10.5″ 14 bolt truck with Eaton positraction
    • Carbon fiber clutches
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    Powertrax – No-Slip Traction System (Part No.9207053000)

    No-Slip Traction System

    from

    $591.99
    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!The Powertrax® Lock-Right Locker provides outstanding traction for off-road machines and race vehicles. Powertrax No-Slip Traction Systems deliver excellent performance to street-driven cars and trucks.
  • Powertrax® lockers range from the original, Lock-Right for serious straight-line performance, to the No-Slip traction system for street-able vehicles.
  • Powertrax® 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.
  • Powertrax® = Extreme Traction Systems!
  • See More

    Motive Gear – Differential Gear Install Kit (Part No.GM10.5IK)

    Differential Gear Install Kit

    from

    $54.99


    Product Features:
    • MINI INST KIT GM 14BLT 10.5″ 4.10DN 1972-88
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    Yukon Gear – Bearing Race Driver (Part No.56019)

    Bearing Race Driver

    from

    $192.99
    Bearing race driver. No return.

    Product Features:
    • Bearing race driver
    • Fits LM104911 race
    • All steel construction
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    Motive Gear – Differential Ring and Pinion (Part No.GM12-411)

    Differential Ring and Pinion

    from

    $205.99


    Product Features:
    • GM 12BL 8.875 R/P 4.11 MG
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    Motive Gear – Axle Shaft (Part No.MG1774)

    Axle Shaft

    from

    $168.99
    The Motive Gear replacement axle shaft offers an OE-quality axle shaft at a fraction of the OE cost. Manufactured from 1541H material on high-tolerance CNC equipment, this axle shaft is designed to provide a perfect fit every time.

    Product Features:
    • AXLE SHAFT 10.5″ 30 SPL. 37 9/16″ R.H.
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    Yukon Gear – Dura Grip Positraction For 10.5" GM 14 Bolt Truck, 4.10 & Down (Part No.26030)

    Dura Grip Positraction For 10.5" GM 14 Bolt Truck, 4.10 & Down

    from

    $1099.99
    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 10.5″ 14 bolt truck
    • 4.10 ratio and down only
    • 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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    Motive Gear – Differential Bearing Kit – Koyo (Part No.R14R)

    Differential Bearing Kit - Koyo

    from

    $144.99
    Motive Gear Differential Bearing Kits Include Front & Rear Pinion Bearing, Pinion Seal, Carrier Bearings, Pilot Bearing Where Applicable, Gear Marking Compound, Crush Sleeve, Pinion Nut, Brush, Thread Locking Compound And Cover Gasket Or Rtv

    Product Features:
    • GM 10.5 KIT BRG & SEAL 14BLT ’72-88
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    Pro-King – Differential Pinion Gear Washer (Part No.744A216)

    Differential Pinion Gear Washer

    from

    $3.19
    Pro-King is the leading supplier of transmission and driveline products in the aftermarket.

    Product Features:
    • All products are designed to meet or exceed OE quality, form, fit and funtion.
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    National – Bearings (Part No.HM803149)

    Bearings

    from

    $36.49
    National Oil Seals & Bearings offer a full line of premium oil seals and bearings.

    Product Features:
    • Premium bearing design matches OEM specifications
    • Precision manufactured using premium-grade steel for outstanding durability and performance
    • Crowned raceways and rollers to ensure even load distribution for maximum life
    • Industry leading coverage
    • Professional technicians know they can depend on National
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    Yukon Gear – DiffrlPinSupportBolt (Part No.33582)

    DiffrlPinSupportBolt

    from

    $5.99
    DiffrlPinSupportBolt

    Yukon Gear – 14T Side Gear Thrust Washer (Part No.33383)

    14T Side Gear Thrust Washer

    from

    $7.99
    14T side gear Thrust washer.

    Product Features:
    • Side gear thrust washer
    • Fits GM 10.5″ 14 bolt truck
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    Yukon Gear – Standard Open Cross Pin Shaft For Four Pinion Design For GM 10.5" 14 Bolt Truck (Part No.33405)

    Standard Open Cross Pin Shaft For Four Pinion Design For GM 10.5" 14 Bolt Truck

    from

    $99.99
    Standard Open cross pin shaft for four pinion design for GM 14T.

    Product Features:
    • Cross pin shaft
    • Fits GM 10.5″ 14 bolt truck
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    Felpro – Differential Cover Gasket (Part No.RDS 55063)

    Differential Cover Gasket

    from

    $6.79
    Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

    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 – 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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    Yukon Gear – Standard Open Carrier Case, GM 10.5" 14 Bolt Truck, 4.10 & Down (Part No.20100)

    Standard Open Carrier Case, GM 10.5" 14 Bolt Truck, 4.10 & Down

    from

    $689.99
    Product Features:
    • Standard open carrier case
    • Fits GM 10.5″ 14 bolt truck
    • 4.10 and down ratio only
    • Does not include spider gears
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    Yukon Gear – Standard Open Spider Gear Kit For GM 10.5" And 14T With 30 Spline Axles (Part No.16044)

    Standard Open Spider Gear Kit For GM 10.5" And 14T With 30 Spline Axles

    from

    $315.99
    Yukon standard open spider gear kit for GM 10.5″ and 14T 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 GM 10.5″ 14 bolt truck open differential
    • Includes two side gears, four pinion gears, cross pin shaft, cross pin bolt and spider gear thrust washers.
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    1977 GMC C25 Differentials

    Maybe you’re in the middle of a full rebuild of that 1977 GMC C25. Maybe you just need a couple of Differentials. Either way, Advance Auto Parts has 133 different Differentials in our inventory ranging from $0.91 to $1,099.99. That means you can find the exact parts or products you need to keep that 1977 GMC C25 running smoothly.

    Differentials are only as good as their brand. We stock 12 different brands to make sure you have plenty of trusted parts to choose from for your 1977 GMC C25. National, Felpro, and Dorman are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!

    We know you’ll find the perfect Differentials for your 1977 GMC C25, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 354 reviews in this category, some of the top rated parts include Differential Ring And Pinion with 5.0 stars and Differential Carrier Shim Kit with 2.7 stars.

    So if you’re in the market for aftermarket Differentials to keep your 1977 GMC C25 rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!

    Differentials Brands To Make Your 1977 GMC C25 Last

    Simple repair, complete replacement, or a full rebuild. No matter the job, your 1977 GMC C25 demands trusted brand parts and products to keep it running. Many trusted brands of Differentials make up Advance Auto Parts’ inventory, and all are ready to help make your C25 the best it can be. Be sure to browse some of our top Differentials brands and parts.

    Popular Mr. Gasket Differentials

    We carry Mr. Gasket parts in our stock across Rear Differential Cover Gaskets categories, plus more. For a 1977 GMC C25, our most popular Mr. Gasket Differentials include:
    Differential Gasket
    from $15.99
    (1)
    Differential Gasket
    Rear Differential Cover Gaskets

    Top 1977 GMC C25 Differentials from National

    National products are another trusted brand when it comes to Differentials for your 1977 GMC C25. Popular National parts include:
    Bearings
    from $22.99
    (12)
    Bearings
    Differential Bearings
    Bearings
    from $16.99
    (6)
    Bearings
    Differential Bearings

    FAQs for 1977 GMC C25 Differentials

    What are the most purchased Differentials for the 1977 GMC C25?

    Out of 133 Differentials for the 1977 GMC C25, the most popular in our inventory are:
    Differential Cover Gasket
    from $6.79
    (13)
    Differential Cover Gasket
    Rear Differential Cover Gaskets
    Differential Shaft Lock Bolt
    from $5.99
    (11)
    Differential Shaft Lock Bolt
    Differential Pinion Shaft Lock Bolts
    3 Qt - Penzoil 80W90 Conventional Gear Oil
    from $44.99
    This product is not rated
    3 Qt – Penzoil 80W90 Conventional Gear Oil
    Differential Oil

    What are the top-rated 1977 GMC C25 Differentials?

    Top-rated Differentials for your 1977 GMC C25 based on customer reviews/ratings are:
    Differential Ring And Pinion
    from $350.99
    (7)
    Differential Ring And Pinion
    “Great spark plugs.”
    Differential Carrier Shim Kit
    from $8.49
    (3)
    Differential Carrier Shim Kit
    “worked great”
    Differential Ring And Pinion
    from $350.99
    (2)
    Differential Ring And Pinion
    “I have a Chevy Impala 07 that runs on 3 cylinders when not needing the power of 6, and the new plugs have significantly provided an inexpensive tuneup”