1978 Oldsmobile Cutlass Differentials

Essential 1978 Oldsmobile Cutlass Differentials

Yukon Gear – Pinion Nut Washer (Part No.33167)

Pinion Nut Washer

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$14.99
Pinion nut washer for GM 7.2″ IFS, 7.5″, 7.6″, 7.6″ IFS, 8.5″, 8.6″ & 9.5″.

Product Features:
  • Pinion nut washer for GM 7.2″ IFS, 7.5″, 7.625″, 7.6″ IFS, 8.5″, 8.6″ and 9.5″.
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Yukon Gear – Mini Spool For GM 8.5" With 30 Spline Axles (Part No.32233)

Mini Spool For GM 8.5" With 30 Spline Axles

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$188.99
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 give 100% power to both tires at all times. These units are not recommended for street-driven vehicles. We recommend full spools for vehicles with large tires or high horsepower. These units come with a one year warranty against manufacturing defects.

Product Features:
  • Fits GM 8.5″ with 30 spline axles
  • Installs into a standard open carrier case
  • Provides 100% traction to both wheels at all times
  • Not recommended for street driven vehicles
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Yukon Gear – 14 Plate Duragrip Composite Clutches For GM 8.2", GM 8.5", 12T, 12P, Ford 8.8" & Cast Iron ‘Vette (Part No.16064)

14 Plate Duragrip Composite Clutches For GM 8.2", GM 8.5", 12T, 12P, Ford 8.8" & Cast Iron 'Vette

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$373.99
Product Features:
  • Clutch kit
  • Fits Ford 8.8″, 1963-1979 Corvette, GM 12 bolt passenger car and truck, 8.2″, 8.5″ and 8.6″ Dura Grip positraction
  • 14 piece kit
  • Composite 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"

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$52.99
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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USA Standard Gear – Spartan Spring & Pin Kit, Fits Smaller Designs (Part No.17011)

Spartan Spring & Pin Kit, Fits Smaller Designs

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$26.99
Spartan spring & pin kit, fits smaller designs.

Product Features:
  • Replacement spring and pin kit for Spartan Locker
  • Fits Dana 30, Dana 44, AMC Model 20, AMC Model 35, and Toyota designs
  • Includes 4 springs and 4 alignment pins
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Pro-King – Differential Ring Gear Bolt (Part No.742G935)

Differential Ring Gear Bolt

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$1.99
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 – Multi Purpose Seal (Part No.8460N)

Multi Purpose Seal

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$12.29
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 – 7.5 & 7.625 Standard Open Pinion Gear Thrust Washer (Part No.33390)

7.5 & 7.625 Standard Open Pinion Gear Thrust Washer

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$8.99
7.5 & 7.625 Standard Open Pinion gear Thrust Washer.

Product Features:
  • Pinion gear thrust washer for GM 7.5″ and 7.625″
  • Fits standard open differentials only
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Yukon Gear – 3 Qt – Penzoil 80W90 Conventional Gear Oil (Part No.15002)

3 Qt - Penzoil 80W90 Conventional Gear Oil

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$44.99
3 Qt. Penzoil 80W90 conventional gear Oil.

Product Features:
  • Includes three quarts of conventional oil
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Dorman – Differential Ring and Pinion Set (Part No.697-303)

Differential Ring and Pinion Set

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$307.99
This differential ring and pinion directly replaces the original equipment on specific vehicle years, makes and models.

Product Features:
  • Direct replacement – this ring and pinion set matches the fit and function of the original components on certain vehicle applications
  • Effective fix – eliminates grinding and whining from failed original bearings
  • Thoroughly tested – vehicle try-on testing and rigorous quality control measures ensure longevity
  • Trustworthy quality – backed by team of designers and engineers in the United States
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National – Bearings (Part No.HM89210)

Bearings

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$14.99
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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Motive Gear – Differential Carrier Gear Kit (Part No.GM7.5BI)

Differential Carrier Gear Kit

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$115.99


Product Features:
  • INTERNAL KT GM 7.5 26 SPL
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National – Bearings (Part No.LM501314)

Bearings

from

$10.49
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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Motive Gear – Differential Master Bearing Kit – Timken (Part No.R10RMKT)

Differential Master Bearing Kit - Timken

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$135.99
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:
  • KIT BRG & SEAL GM 10 BOLT MASTER NON IFS FRONT / REAR
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Yukon Gear – Differential Cover B (Part No.33572)

Differential Cover B

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$7.99
Differential Cover B

Yukon Gear – Redi Sleeve For GM 8.5", 9.5" & 8.2" Bop Yokes (Part No.30229)

Redi Sleeve For GM 8.5", 9.5" & 8.2" Bop Yokes

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$57.99
8.5, 9.5, & 8.2 Buick, Oldsmobile, Pontiac GM REDI sleeve yoke saver.Yukon Mighty seal.

Product Features:
  • Pinion Redi-sleeve
  • Fits GM 8.5″, 9.5″ and 8.2″ Buick, Oldsmobile and Pontiac
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USA Standard Gear – Master Overhaul Kit for the GM 8.5 Differential (Part No.37055)

Master Overhaul Kit for the GM 8.5 Differential

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$206.99
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 8.5″ rear
  • 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 ’81 And Older GM 7.5" Differential (Part No.13063)

Pinion Install Kit For '81 And Older GM 7.5" Differential

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$187.99
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 Timken 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 1981 and down GM 7.5″
  • Included are pinion bearings and races, pinion seal, crush sleeve, complete pinion shim kit, and marking compound with brush.
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Pro-King – Differential Internal Nest Kit (Part No.741A717)

Differential Internal Nest Kit

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$184.99
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 – Pinion Depth Shims For GM 8.25" IFS, 8.5", 12 Bolt Car, Ford 8.8" & Chrysler 8.25" (Part No.55009)

Pinion Depth Shims For GM 8.25" IFS, 8.5", 12 Bolt Car, Ford 8.8" & Chrysler 8.25"

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$27.99
8.25″ IFS, 8.5″, 12P, 7.5″ F, 8.8″ F, 8.25″ Chrysler pinion shim kit.

Product Features:
  • Pinion depth shims for GM 8.25″ IFS, 8.5″, 8.6″, 12 bolt passenger car, Ford 7.5″ and 8.8″, Chrysler 8.25″
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Yukon Gear – Chrome Cover For 8.2" Buick, Oldsmobile, And Pontiac GM (Part No.32015)

Chrome Cover For 8.2" Buick, Oldsmobile, And Pontiac GM

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$67.99
Product Features:
  • Fits 8.2″ Buick, Oldsmobile and Pontiac
  • Chrome
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Yukon Gear – Bearing Race Driver (Part No.56020)

Bearing Race Driver

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$188.99
Bearing race driver. No return.

Product Features:
  • Bearing race driver
  • Fits M802011 race
  • All steel construction
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Richmond Gear – MiniSpool (Part No.78-7526-1)

MiniSpool

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$124.99
MiniSpool

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

$151.99
Yukon Carrier installation kits are great, low cost kit for carrier changes such as Positraction or locker upgrades. Carrier installation kit for GM 8.5″ differential with HD bearings for large journal carrier. This kit contains carrier bearings, races and shims. This kit is used in 8.5″ differentials using a Yukon Dura Grip, Eaton posi, ValueTrac, True Trac, Pro-Series Auburn, Detroit Locker or standard carrier with large bearing journals.

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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Pro-King – Differential Cross Shaft (Part No.742G930)

Differential Cross Shaft

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$2.79
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 – Positraction Clutch Guide (Part No.33352)

Positraction Clutch Guide

from

$8.99
Positraction clutch guide.

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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Motive Gear – Differential Gear Install Kit (Part No.GM8.5PIK)

Differential Gear Install Kit

from

$59.99


Product Features:
  • 8.5 “P” AXLE MINI INSTALL KIT
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Yukon Gear – Standard Open Cross Pin (0.795" Diameter) For 8.5" GM – Fits Some Eaton Positractions (Part No.33401)

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

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$47.99
Standard open cross pin (0.795″ diameter) for 8.5″ GM. fits some Eaton positractions.

Product Features:
  • Cross pin shaft for GM 8.5″ and 8.6″
  • Fits standard open differentials only
  • 0.795″ diameter
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1978 Oldsmobile Cutlass Differentials

Maybe you’re in the middle of a full rebuild of that 1978 Oldsmobile Cutlass. Maybe you just need a couple of Differentials. Either way, Advance Auto Parts has 146 different Differentials in our inventory ranging from $2.49 to $1,014.99. That means you can find the exact parts or products you need to keep that 1978 Oldsmobile Cutlass 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 1978 Oldsmobile Cutlass. National, Felpro, and Yukon Gear 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 1978 Oldsmobile Cutlass, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 490 reviews in this category, some of the top rated parts include Differential Master Bearing Kit – Koyo with 3.8 stars and Multi Purpose Seal with 4.0 stars.

So if you’re in the market for aftermarket Differentials to keep your 1978 Oldsmobile Cutlass 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 1978 Oldsmobile Cutlass Last

Simple repair, complete replacement, or a full rebuild. No matter the job, your 1978 Oldsmobile Cutlass 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 Cutlass the best it can be. Be sure to browse some of our top Differentials brands and parts.

Popular Felpro Differentials

We carry Felpro parts in our stock across Rear Differential Cover Gaskets categories, plus more. For a 1978 Oldsmobile Cutlass, our most popular Felpro Differentials include:
DIFFERENTIAL GASKET
from $7.99
(45)
DIFFERENTIAL GASKET
Rear Differential Cover Gaskets

FAQs for 1978 Oldsmobile Cutlass Differentials

What are the most purchased Differentials for the 1978 Oldsmobile Cutlass?

Out of 146 Differentials for the 1978 Oldsmobile Cutlass, the most popular in our inventory are:
Bearings
from $16.99
(25)
Bearings
Differential Bearings
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 1978 Oldsmobile Cutlass Differentials?

Top-rated Differentials for your 1978 Oldsmobile Cutlass based on customer reviews/ratings are:
Differential Master Bearing Kit - Koyo
from $156.99
(5)
Differential Master Bearing Kit – Koyo
“was delivered as promised and on time”
Multi Purpose Seal
from $15.99
(4)
Multi Purpose Seal
“Perfect”
Bearings
from $10.49
(2)
Bearings
“Reasonable price and woks well. front diff 2006 Escalade esv”