The 1956 MG Za has 11 drivetrain parts with verified fitment on this page — 4 part types and 4 brands, covering the 1.5L L4 engine. Each part includes a manufacturer part number and application notes.
On the 1956 MG Za, 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 (5 parts), Differential Pinion Repair Sleeve (2 parts) and Differential Pinion Seal (2 parts). The other 1 part type covers the remaining 2 parts.
The 1956 MG Za came with a single engine, the 1.5L L4, and every part is verified against it.
4 brands supply drivetrain parts for the 1956 MG Za, led by WJB / INMOTION PARTS (4 parts), BCA (4 parts) and DANA (2 parts), plus 1 more brand. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1956 MG Za. 1 part has it: BCA NB15250X (Differential Pinion Bearing / Race). Each part number 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 Popular | NB15250X | 🇺🇸 US | Race Only | View on Amazon |
| BCA | NB15100 | 🇺🇸 US | Rear Outerwith British Leyland Axle(s) | View on Amazon |
| BCA | NB3120 | 🇺🇸 US | Race | View on Amazon |
This table covers the bearings and races on the differential pinion.
5 Differential Pinion Bearing / Race parts for the 1956 MG Za come from 2 brands — BCA and WJB / INMOTION PARTS. The "Popular" part is BCA NB15250X.
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 3 parts: built to original-equipment specification. A representative part number is BCA NB15250X.
Listed part numbers: BCA NB15250X, WJB / INMOTION PARTS WT15250X and WJB / INMOTION PARTS WT15100, plus the other parts above.
Differential Pinion Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER | SR3477 | 🇺🇸 US | Rearwith 1.500 In Shaft | 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.
2 Differential Pinion Repair Sleeve parts are listed for the 1956 MG Za, from SCHAEFFLER and WJB / INMOTION PARTS.
Part numbers include SCHAEFFLER SR3477 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 |
| 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.
2 Differential Pinion Seal parts are listed for the 1956 MG Za, from BCA and WJB / INMOTION PARTS.
Listed part numbers: BCA NS51098 and WJB / INMOTION PARTS WS51098.
Universal Joint
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DANA | 25101X | 🇺🇸 US | Spicer SelectNon-Greasable | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DANA | 5101X | 🇺🇸 US | SpicerNon-Greasable | View on Amazon |
This table covers the U-joints in the driveshaft.
DANA supplies both parts for the 1956 MG Za.
Economy: 1 part, from DANA. A representative part number is DANA 25101X.
The Standard Replacement section: 1 option from DANA. DANA 5101X is listed in this group.
Listed part numbers: DANA 25101X and DANA 5101X.
Buying Drivetrain Parts for a 1956 MG Za
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 1.5L 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 1956 MG Za?
Our catalog currently lists 11 drivetrain parts for the 1956 MG Za across 4 subcategories and 4 brands, covering the 1.5L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 1956 MG Za?
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 1956 MG Za 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 1956 MG Za?
Every part on this page is matched to the 1.5L 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 1956 MG Za
Drivetrain Parts for Other MG Za Years
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