This page lists 10 drivetrain parts for the 1961 Austin A40, across 3 part types, covering the 948cc L4 engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 1961 Austin A40, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. All 10 listed parts are Differential Pinion Bearing / Race (4 parts), Differential Pinion Repair Sleeve (3 parts) and Differential Pinion Seal (3 parts).
The 1961 Austin A40 came with a single engine, the 948cc L4, and every part is verified against it.
4 brands supply drivetrain parts for the 1961 Austin A40, led by WJB / INMOTION PARTS (4 parts), BCA (3 parts) and SKF (2 parts), plus 1 more brand. Quality grades include Economy and Standard Replacement.
Each part number listed for the 1961 Austin A40 opens a page with every vehicle that part fits.
Differential Pinion Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WT15250X | 🇺🇸 US | RaceOutside Diameter: 2.5 In | View on Amazon |
| WJB / INMOTION PARTS | WT15100 | 🇺🇸 US | Rear Outerwith British-Leyland Axle | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NB15250X | 🇺🇸 US | Race Only | View on Amazon |
| BCA | NB15100 | 🇺🇸 US | Rear Outerwith British Leyland Axle(s) | View on Amazon |
This table covers the bearings and races on the differential pinion.
4 Differential Pinion Bearing / Race parts for the 1961 Austin A40 come from 2 brands — WJB / INMOTION PARTS and BCA.
The Economy section lists 2 options from WJB / INMOTION PARTS — the catalog's value-priced group. WJB / INMOTION PARTS WT15250X is listed in this group.
In the Standard Replacement grade, BCA supplies 2 parts: built to original-equipment specification. A representative part number is BCA NB15250X.
This group includes WJB / INMOTION PARTS WT15250X, WJB / INMOTION PARTS WT15100 and BCA NB15250X and the remaining parts above.
Differential Pinion Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER | SR3477 | 🇺🇸 US | Rearwith 1.500 In Shaft | View on Amazon |
| SKF | 480151 | 🇺🇸 US | Rear | View on Amazon |
| WJB / INMOTION PARTS | WS99149 | 🇺🇸 US | Rear Outerwith British Leyland Axle | View on Amazon |
This table covers the wear sleeves used to restore a grooved pinion seal surface.
3 Differential Pinion Repair Sleeve parts are listed for the 1961 Austin A40, from SCHAEFFLER, SKF and WJB / INMOTION PARTS.
Listed part numbers: SCHAEFFLER SR3477, SKF 480151 and WJB / INMOTION PARTS WS99149.
Differential Pinion Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NS51098 | 🇺🇸 US | Rear Outerwith British Leyland Axle(s) | View on Amazon |
| SKF | 15142 | 🇺🇸 US | Rear | View on Amazon |
| WJB / INMOTION PARTS | WS51098 | 🇺🇸 US | Rear Outerwith British Leyland 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.
3 Differential Pinion Seal parts are listed for the 1961 Austin A40, from BCA, SKF and WJB / INMOTION PARTS.
Listed part numbers: BCA NS51098, SKF 15142 and WJB / INMOTION PARTS WS51098.
Buying Drivetrain Parts for a 1961 Austin A40
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 948cc L4 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 Pinion Repair Sleeve .
Frequently Asked Questions
How many drivetrain parts fit the 1961 Austin A40?
Our catalog currently lists 10 drivetrain parts for the 1961 Austin A40 across 3 subcategories and 4 brands, covering the 948cc L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 1961 Austin A40?
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 1961 Austin A40 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 1961 Austin A40?
Every part on this page is matched to the 948cc L4 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 1961 Austin A40
Drivetrain Parts for Other Austin A40 Years
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