The 1971 Ac 428 has 24 drivetrain parts with verified fitment on this page — 5 part types and 5 brands, covering the 7.0L V8 engine. Each part includes a manufacturer part number and application notes.
On the 1971 Ac 428, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. Most of the listed parts are Differential Pinion Bearing / Race (9 parts), Differential Carrier Bearing / Race (6 parts) and Differential Pinion Seal (5 parts). The other 2 part types cover the remaining 4 parts.
The 1971 Ac 428 came with a single engine, the 7.0L V8, and every part is verified against it.
5 brands supply drivetrain parts for the 1971 Ac 428, led by WJB / INMOTION PARTS (9 parts), BCA (9 parts) and NATIONAL (4 parts), plus 2 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1971 Ac 428. 5 parts have it, including NATIONAL 25523 (Differential Carrier Bearing / Race) and NATIONAL 02820 (Differential Pinion Bearing / Race). Each part number opens a page with every vehicle that part fits.
Axle Shaft Bearing
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WTA5 | 🇺🇸 US | Bearing & Race Set | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | A5 | 🇺🇸 US 🇨🇦 CA | GoldBearing & Race Set | View on Amazon |
| BCA | NBA5 | 🇺🇸 US | Taper Bearing SetIncludes Cup and Cone | View on Amazon |
This table covers the Axle Shaft bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
3 Axle Shaft Bearing parts for the 1971 Ac 428 come from 3 brands — WJB / INMOTION PARTS, ACDELCO and BCA.
The Economy section lists 1 option from WJB / INMOTION PARTS — the catalog's value-priced group. WJB / INMOTION PARTS WTA5 is listed in this group.
In the Standard Replacement grade, ACDELCO and BCA supply 2 parts: built to original-equipment specification. A representative part number is ACDELCO A5.
This group includes WJB / INMOTION PARTS WTA5, ACDELCO A5 and BCA NBA5.
Differential Carrier Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WT25523 | 🇺🇸 US | Race | View on Amazon |
| WJB / INMOTION PARTS | WT25577 | 🇺🇸 US | Rearwith Salisbury 4HA Axle | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL Popular | 25523 | 🇺🇸 US | Race | View on Amazon |
| NATIONAL Popular | 25577 | 🇺🇸 US | Rearwith Salisbury 4HA Axle | View on Amazon |
| BCA | NB25523 | 🇺🇸 US | Race | View on Amazon |
| BCA | NB25577 | 🇺🇸 US | Rearwith Salisbury 4HA Axle | View on Amazon |
This table covers the bearings and races that support the differential carrier.
6 Differential Carrier Bearing / Race parts are listed for the 1971 Ac 428, from WJB / INMOTION PARTS, NATIONAL and BCA. NATIONAL 25523 carries the "Popular" badge.
Economy: 2 parts, from WJB / INMOTION PARTS. A representative part number is WJB / INMOTION PARTS WT25523.
The Standard Replacement section: 4 options from NATIONAL and BCA. NATIONAL 25523 is listed in this group.
This group includes NATIONAL 25523, WJB / INMOTION PARTS WT25523 and WJB / INMOTION PARTS WT25577 and the remaining parts above.
Differential Pinion Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WT02820 | 🇺🇸 US | Race | View on Amazon |
| WJB / INMOTION PARTS | WT31520 | 🇺🇸 US | Race | View on Amazon |
| WJB / INMOTION PARTS | WT02872 | 🇺🇸 US | Rear Outerwith Salisbury 4HA Axle | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL Popular | 02820 | 🇺🇸 US | Race | View on Amazon |
| NATIONAL Popular | 02872 | 🇺🇸 US | Rear Outerwith Salisbury 4HA Axle | View on Amazon |
| BCA | NB02820 | 🇺🇸 US | Race | View on Amazon |
| BCA | NB31520 | 🇺🇸 US | Race | View on Amazon |
| BCA | NB02872 | 🇺🇸 US | Rear Outerwith Salisbury 4HA Axle(s) | View on Amazon |
| BCA | NB31593 | 🇺🇸 US | Rear Innerwith Salisbury 4HA Axle(s) | View on Amazon |
This table covers the bearings and races on the differential pinion.
9 Differential Pinion Bearing / Race parts for the 1971 Ac 428 come from 3 brands — BCA, WJB / INMOTION PARTS and NATIONAL. The "Popular" part is NATIONAL 02820.
The Economy section: 3 options from WJB / INMOTION PARTS. WJB / INMOTION PARTS WT02820 is listed in this group.
Standard Replacement: 6 parts, from BCA and NATIONAL. A representative part number is NATIONAL 02820.
Listed part numbers: NATIONAL 02820, WJB / INMOTION PARTS WT02820 and WJB / INMOTION PARTS WT31520, plus the other parts above.
Differential Pinion Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WS99155 | 🇺🇸 US | Rear Outerwith Salisbury 4HA Axle | View on Amazon |
This table covers the wear sleeves used to restore a grooved pinion seal surface.
One part is listed for the 1971 Ac 428 — WJB / INMOTION PARTS WS99155.
Differential Pinion Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS Popular | WS5778 | 🇺🇸 US | Nitrile | View on Amazon |
| BCA | NS5778 | 🇺🇸 US | Nitrile | View on Amazon |
| BCA | NS5778V | 🇺🇸 US | Viton | View on Amazon |
| SCHAEFFLER | SS2633 | 🇺🇸 US | Rear16.891 mm Width | View on Amazon |
| WJB / INMOTION PARTS | WS5778V | 🇺🇸 US | Rear Outerwith Salisbury 4HA Axle | View on Amazon |
This table covers the seals at the differential pinion yoke. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
5 Differential Pinion Seal parts are listed for the 1971 Ac 428, from WJB / INMOTION PARTS, BCA and SCHAEFFLER. WJB / INMOTION PARTS WS5778 carries the "Popular" badge.
Part numbers include WJB / INMOTION PARTS WS5778, BCA NS5778 and BCA NS5778V, among others listed above.
Buying Drivetrain Parts for a 1971 Ac 428
On this vehicle, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.
- Confirm you have the 7.0L V8 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Differential Pinion Bearing / Race and Differential Carrier Bearing / Race .
Frequently Asked Questions
How many drivetrain parts fit the 1971 Ac 428?
Our catalog currently lists 24 drivetrain parts for the 1971 Ac 428 across 5 subcategories and 5 brands, covering the 7.0L V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 1971 Ac 428?
Common symptoms include clicking in tight turns, a clunk when shifting between drive and reverse, vibration that builds with speed, or gear oil on the inside of a wheel. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1971 Ac 428 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1971 Ac 428?
Every part on this page is matched to the 7.0L V8 engine. Then a torn CV boot caught early is a cheap boot kit; caught late it is a whole axle — inspect before deciding which to buy. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1971 Ac 428
Drivetrain Parts for Other Ac 428 Years
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