SKU: ZA G551818 | UPC: 883584350590
USA Standard Gear ZA G551818 Axle Shaft for 1977-1988 Monte Carlo, El Camino, Buick Regal & More
USA Standard Gear ZA G551818 is a precision-engineered passenger-side axle shaft designed for GM vehicles equipped with 8.5-inch 10-bolt rear differentials and 28-spline axles. This direct replacement restores smooth power delivery and dependable drivetrain performance in classics like Chevrolet Monte Carlo, El Camino, Malibu, Buick Regal, Oldsmobile Cutlass Supreme, and Pontiac Bonneville. Built from high-strength alloy steel with heat treatment for extended service life under demanding conditions.
Key Features
- 28-Spline Design – Matches OEM specifications for seamless integration and full power handling.
- 30.5-Inch Length – Exact dimension for passenger-side fit in GM 8.5-inch rear ends.
- 1.500-Inch Bearing Journal – Ensures proper seating and alignment in factory housings.
- Heat-Treated Alloy Steel – Provides strength to withstand torque and heat from performance driving.
- Direct Replacement – No modifications needed for quick installation in compatible GM models.
- Precision Machined – Minimizes vibrations and maximizes driveline efficiency.
Specifications
| Detail | Value |
|---|---|
| Brand | USA Standard Gear |
| Type | Passenger Side Axle Shaft |
| Compatibility | GM 8.5" 10-Bolt Rear 28-Spline |
| Spline Count | 28 |
| Overall Length | 30.5 inches |
| Bearing Journal Diameter | 1.500 inches |
| Weight | 22 lbs |
| Shipping Box Dimensions | 36 x 8 x 8 inches |
| Country of Origin | China |
| Warranty | Limited Lifetime |
Whats Included
- 1 x USA Standard Gear ZA G551818 Passenger Side Axle Shaft
Product Notes
- Special order item, allow extra time for processing
- Confirm your vehicle's rear axle is 8.5-inch 28-spline before purchase
- Professional installation recommended for optimal safety and performance
This Part Fits
| Year Range | Make | Model | Notes |
|---|---|---|---|
| 1978-1983 | Buick | Regal | Base |
| 1982-1983 | Buick | Regal | Estate Wagon |
| 1978-1983 | Buick | Regal | Limited |
| 1982 | Buick | Regal | Limited Turbo |
| 1978-1982 | Buick | Regal | Sport |
| 1983 | Buick | Regal | T-Type |
| 1977-1987 | Chevrolet | El Camino | Base |
| 1977 | Chevrolet | El Camino | Classic |
| 1977-1978,1981-1986 | Chevrolet | El Camino | Conquista |
| 1979-1981 | Chevrolet | El Camino | Royal Knight |
| 1977-1987 | Chevrolet | El Camino | SS |
| 1978-1981 | Chevrolet | Malibu | Base |
| 1978-1983 | Chevrolet | Malibu | Classic |
| 1978-1980 | Chevrolet | Malibu | Classic Estate |
| 1978-1981 | Chevrolet | Malibu | Classic Landau |
| 1979-1980 | Chevrolet | Malibu | Classic Sport |
| 1979-1980 | Chevrolet | Malibu | Estate |
| 1979 | Chevrolet | Malibu | Landau |
| 1979 | Chevrolet | Malibu | Police |
| 1979-1980 | Chevrolet | Malibu | Sport |
| 1979,1981-1988 | Chevrolet | Monte Carlo | Base |
| 1983 | Chevrolet | Monte Carlo | CL |
| 1978-1981 | Chevrolet | Monte Carlo | Landau |
| 1986-1988 | Chevrolet | Monte Carlo | LS |
| 1978,1980 | Chevrolet | Monte Carlo | Sport |
| 1983-1988 | Chevrolet | Monte Carlo | SS |
| 1987 | Oldsmobile | Cutlass Supreme | 442 |
| 1986-1987 | Oldsmobile | Cutlass Supreme | Base |
| 1986-1987 | Oldsmobile | Cutlass Supreme | Brougham |
| 1988 | Oldsmobile | Cutlass Supreme | Classic |
| 1988 | Oldsmobile | Cutlass Supreme | Classic Brougham |
| 1986 | Pontiac | Bonneville | Base |
| 1986 | Pontiac | Bonneville | Brougham |
| 1986 | Pontiac | Bonneville | LE |
Why Choose USA Standard Gear?
- Proven durability in high-torque GM applications
- Exact OEM-spec dimensions for bolt-in installation
- Heat-treated construction resists wear and fatigue
- Backed by limited lifetime warranty for peace of mind
Frequently Asked Questions
- Q: Is this axle shaft for the left or right side?
- A: This is the passenger-side (right) axle shaft for GM 8.5-inch rears.
- Q: Will it fit my 1986 Monte Carlo SS?
- A: Yes, it fits 1983-1988 Chevrolet Monte Carlo SS with 28-spline 8.5-inch axle.
- Q: What spline count does it have?
- A: 28 splines, matching factory GM 10-bolt 8.5-inch differentials.
Shipping & Handling
- Method: UPS Ground / FedEx Ground
- Availability: Special order – ships within 2-3 business days
- Packaging: Securely boxed to prevent damage during transit
Axles
Performance axle shafts and complete axles for street cars, drag builds, trucks, Jeeps, and all-wheel-drive platforms are stocked at Black Ops Auto Works. Shop heavy-duty CV axles, front axle shafts, rear axle shafts, chromoly axles, 300M axles, drag-race axles, off-road axle upgrades, hubs, CV joints, spline-matched replacement axles, and drivetrain components for Trackhawk, Durango Hellcat, Charger, Challenger, Subaru WRX and STI, Honda, Nissan Skyline, GM trucks, and Ford applications. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 241 axle SKUs across front and rear drive positions, axle-shaft materials, CV configurations, spline counts, power ratings, and vehicle-specific drivetrain systems. What This Axle Collection Covers Axles transfer torque from the differential or transaxle to the driven wheels. This collection includes upgraded shafts and replacement units for perfo...
View Axles Products
Axles & Components
Performance axles and axle components for high horsepower Mopar Hellcat and Trackhawk platforms, sport compact swaps, and classic muscle cars and trucks are stocked at Black Ops Auto Works. Shop upgraded CV axle shafts, axle seals, axle disconnect kits, and OE style replacement axles from DSS, USA Standard, Yukon Gear and Axle, and G Force for Jeep, Dodge, Honda, Subaru, Nissan, and classic GM truck platforms. Every axle is filterable by year, make, model, trim, and horsepower rating so the correct spline count, length, and CV joint configuration ships the first time. Black Ops Auto Works carries 276 axle and axle component SKUs across Mopar Hellcat and Trackhawk, JDM and sport compact swap platforms, and classic GM truck and passenger car applications. What This Collection Covers Axle shafts transmit engine and transmission torque from the differential to the wheels, and factory axles are engineered around factory horsepower and torque figures with limited safety margin for sig...
View Axles & Components Products
Drivetrain
Drivetrain parts for high-horsepower Mopar, truck, Jeep, and import platforms are stocked at Black Ops Auto Works. Shop differentials, axles, driveshafts, clutch kits, flywheels, flexplates, shifters, transmission components, ring and pinion gears, differential braces, and driveline hardware for Hellcat, Trackhawk, TRX, HEMI, LS, LT, Coyote, and turbocharged import platforms. Every drivetrain part is filterable by vehicle platform, drivetrain layout, transmission type, and power level so the correct part ships the first time. Black Ops Auto Works carries 4,765 drivetrain SKUs across differentials, axles, clutches, and transmission hardware. What This Category Covers The drivetrain transfers power from the engine to the wheels and includes the transmission, clutch, driveshafts, axles, differentials, ring and pinion gears, wheel hubs, wheel bearings, U-joints, shifters, mounts, and bushings. Upgrading these components improves power delivery, durability, and reliability under incr...
View Drivetrain Products
Yukon Gear & Axle
Yukon Gear and Axle drivetrain parts are stocked at Black Ops Auto Works for GM, Ford, Chrysler, Ram, and Jeep platforms. Shop ring and pinion sets, positraction and locker units, axle overhaul kits, differential covers, driveshafts, and manual transmission rebuild components for Dana 60/61, GM 8.2/8.5/8.6/9.5, Ford 8.8/9/10.25/10.5, and Chrysler 8.25/9.25 inch axles. Yukon parts are proven in extreme-duty use, including King of the Hammers and Moab rock crawling events, and every part here is filterable by axle size, gear ratio, and spline count. Black Ops Auto Works carries 1122 Yukon Gear and Axle SKUs across ring and pinion, differential, and axle rebuild categories. What This Brand Covers Yukon Gear and Axle builds ring and pinion sets, differential carriers, positraction and locking differentials, axle shafts, bearing and seal kits, driveshafts, and manual transmission rebuild components for domestic trucks, SUVs, and Jeeps. The brand is best known for supporting extreme-d...
View Yukon Gear & Axle Products


