The 1958 MG ZB 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.
The drivetrain system on the 1958 MG ZB moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. The largest groups 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.
Every part on this page is matched to the 1.5L L4 — the only engine offered in the 1958 MG ZB.
The most listed brands for 1958 MG ZB drivetrain parts are WJB / INMOTION PARTS (4 parts), BCA (4 parts) and DANA (2 parts), plus 1 more brand. Quality grades include Standard Replacement and Economy.
1 part on this 1958 MG ZB page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — BCA NB15250X (Differential Pinion Bearing / Race). Click any part number to see 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 are listed for the 1958 MG ZB, from BCA and WJB / INMOTION PARTS. BCA NB15250X carries the "Popular" badge.
In the Economy grade, WJB / INMOTION PARTS supplies 2 parts: the catalog's value-priced group. A representative part number is WJB / INMOTION PARTS WT15250X.
The Standard Replacement section lists 3 options from BCA — built to original-equipment specification. BCA NB15250X is listed in this group.
This group includes BCA NB15250X, WJB / INMOTION PARTS WT15250X and WJB / INMOTION PARTS WT15100 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 |
| 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 for the 1958 MG ZB come from 2 brands — SCHAEFFLER and WJB / INMOTION PARTS.
This group includes 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 for the 1958 MG ZB come from 2 brands — 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.
2 Universal Joint parts for the 1958 MG ZB come from DANA.
The Economy section: 1 option from DANA. DANA 25101X is listed in this group.
Standard Replacement: 1 part, from DANA. A representative part number is DANA 5101X.
This group includes DANA 25101X and DANA 5101X.
Buying Drivetrain Parts for a 1958 MG ZB
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 1958 MG ZB?
Our catalog currently lists 11 drivetrain parts for the 1958 MG ZB 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 1958 MG ZB?
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 1958 MG ZB 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 1958 MG ZB?
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 1958 MG ZB
Drivetrain Parts for Other MG ZB Years
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