Find Your Parts Quicker , Easier and More Reliable
Trinity Auto Parts sells used OEM and remanufactured rear axle assemblies, front axle assemblies, differential assemblies, and carrier assemblies for cars, trucks, and SUVs. Each unit comes from a well-maintained running vehicle, is fully tested and inspected before it ships, and is matched to your VIN so the gear ratio, brake style, and mounting points are right the first time.
A complete rear axle assembly — what most people call the rear end — is often the fastest repair when a differential has failed, a housing is bent, or the ring and pinion are chewed up. Instead of rebuilding the carrier piece by piece, a shop can swap the whole assembly in a few hours. Tell us what you drive and we will quote a used OEM unit, plus a remanufactured option when one is available.
We check the housing for cracks and bends, turn the pinion and axle shafts to feel for roughness or play, and inspect the tubes, bearing surfaces, and any brake hardware that is included. Units that fail inspection are not sold.
Rear axles vary by gear ratio, differential type, bolt pattern, and brake setup even within one model year. We confirm the axle tag or RPO code against your VIN before the part ships.
Every axle assembly ships with a warranty, and select parts carry coverage up to 2 years. Shipping is free across the USA and Canada, and if the part does not fit, return shipping is free too. Most orders reach continental US addresses in 3 to 5 business days; complete axles usually travel by freight, so allow a little longer.
We have supplied used OEM driveline parts to shops and owners for more than three decades, and we are BBB accredited. That history matters when you are buying a heavy, hard-to-return part sight unseen.
Call +1 725-208-4566 or email [email protected] and you will reach someone who knows the difference between a limited-slip and an open carrier. Prefer the web? Use the quote form on this page.
A low-mileage used OEM axle is the value pick for most daily drivers, while a remanufactured unit with new bearings, seals, and gears makes sense for tow rigs and high-mileage vehicles. We quote both where available.
This guide is for anyone replacing a complete rear axle, front axle, differential, or carrier assembly. Decide first whether you need the whole housing or only the differential and carrier, because that choice drives cost, shipping, and labor.
A rear axle assembly, often called the rear end, is the complete housing with the differential (ring and pinion and carrier) and both axle shafts installed. It turns driveshaft rotation ninety degrees, splits it between the rear wheels and lets them rotate at different speeds in corners. Front axle assemblies do the same job on 4WD trucks.
Buy a used OEM axle if your vehicle is a daily driver with average mileage and you want the lowest cost. Choose remanufactured if the axle tows or hauls and you want new bearings, seals, and gears. Both are inspected and carry a warranty.
| Factor | Used OEM | Remanufactured |
|---|---|---|
| Condition | Original factory unit, inspected and tested | Rebuilt with new bearings and seals, tested after assembly |
| Typical cost vs new | Often 50–70% less than a new dealer part | Less than new, more than used |
| Availability | Wide for most vehicles | Common ratios and popular truck axles |
| Best for | Daily drivers, exact-match originals | Tow rigs, fleet and high-mileage trucks |
A complete rear axle normally ships as the housing with the differential and axle shafts installed. Brake parts and sensors vary by listing.
| Component | Usually included? | Notes |
|---|---|---|
| Axle housing and tubes | Yes | Checked for bends and cracks |
| Differential carrier with ring and pinion | Yes | Ratio confirmed against your axle tag |
| Axle shafts and wheel bearings | Usually | Not on bare differential listings |
| Brake backing plates, drums or rotors, calipers | Varies by listing — confirmed before shipping | Often attached on complete axles |
| ABS wheel speed sensors and tone rings | Varies by listing — confirmed before shipping | Tone ring style must match |
| Driveshaft and gear oil | No | Reuse your driveshaft |
Request a quote with the form above or call +1 725-208-4566.
The rear differential splits engine torque between the rear wheels and lets them turn at different speeds in corners. It comes in open, limited-slip, and locking versions, and the replacement must match. If the housing and tubes are sound, a differential or carrier assembly alone is the cheaper repair. If the housing is bent or a bearing has spun in it, buy the complete axle assembly instead.
The carrier is the cast unit inside the differential that holds the ring gear, spider gears, and side gears and spins on the carrier bearings. Carriers are not universal: many axles use one casting for lower ratios and another for higher ratios, limited-slip carriers are different again, and the spline count must match your axle shafts. We confirm all three against your VIN and axle tag.
Start with the axle tag under a differential cover bolt; it usually prints the ratio directly, such as 3.73, or a tooth count such as 41-11 that you divide. GM trucks list RPO codes on the glovebox service parts label, where the GT or GU code gives the ratio and G80 marks a locking differential. Ford prints a two-character axle code on the door jamb label. With no tag, count ring gear teeth and divide by pinion teeth.
No programming is needed for an axle assembly. A shop supports the vehicle, disconnects the driveshaft, brake lines, parking brake cables, and ABS wiring, then unbolts the U-bolts or control arms and lowers the axle out. Brake parts are swapped over if not included, the differential is filled with the correct gear oil (limited-slip units need friction modifier), fasteners are torqued to spec, and the brakes are bled if a line was opened.
| Item | Detail |
|---|---|
| Delivery | Typically 3–5 business days in the continental US; Canada and freight items can take longer |
| Warranty | Up to 2 years on select parts; every part ships with a warranty — the exact term is on your quote |
| Returns | Free return shipping |
| Coverage | USA & Canada |
Both. We sell complete rear axle assemblies with the housing, differential, and axle shafts installed, as well as bare differential and carrier assemblies for vehicles whose housing is still good. Tell us which you need and we will quote used OEM and, where available, remanufactured options.
A used OEM axle is the original factory unit, inspected and tested, with normal wear for its mileage. A remanufactured axle has been rebuilt with new bearings and seals and worn gears replaced, then tested. Used costs less; remanufactured suits tow vehicles and high-mileage trucks.
Check the metal tag under one of the differential cover bolts; it usually shows the ratio or a tooth count you can divide. GM trucks also list the ratio as an RPO code on the glovebox label. If you send us your VIN, we can confirm the ratio for you.
Physically, yes, but the ratio must match the front axle on 4WD and AWD vehicles, and the speedometer and shift points can be affected on many vehicles. For a straightforward repair, we recommend matching your original ratio, which we confirm from your VIN and axle tag.
Yes. We source open, limited-slip, and locking differential assemblies as they were fitted from the factory. Because a limited-slip carrier is different from an open one, tell us which your vehicle has, or send the VIN and RPO code and we will identify it before quoting.
Your 17-digit VIN, the year, make, model, and trim, drivetrain (2WD, 4WD, or AWD), and the gear ratio or axle tag code if you have it. Photos of the old axle and its tag help us compare. Use the quote form on this page or call +1 725-208-4566.
Return shipping is free, so you are not stuck with a heavy part that does not fit. We reduce that risk up front by matching every axle assembly to your VIN and axle tag before dispatch, checking ratio, differential type, bolt pattern, and brake style against your vehicle.
Yes. We ship axle assemblies and differentials across the USA and Canada, and shipping is free. Delivery to the continental US typically takes 3 to 5 business days; Canadian addresses and freight shipments such as complete axles can take longer, and we will give you a timeline with your quote.
Yes. Every part we sell ships with a warranty, and select parts are covered for up to 2 years. The exact term for your axle assembly is stated on your quote, so you know what is covered before you pay. Free return shipping applies as well.
