The 1957 Triumph TR3A has 17 drivetrain parts with verified fitment on this page — 5 part types and 8 brands, covering the 2.0L L4 engine. Each part includes a manufacturer part number and application notes.
On the 1957 Triumph TR3A, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. 13 parts of the 17 listed are Differential Pinion Bearing / Race (6 parts), Universal Joint (4 parts) and Differential Carrier Bearing / Race (3 parts). The other 2 part types cover the remaining 4 parts.
Every part on this page is matched to the 2.0L L4 — the only engine offered in the 1957 Triumph TR3A.
The most listed brands for 1957 Triumph TR3A drivetrain parts are BCA (5 parts), WJB / INMOTION PARTS (4 parts) and SCHAEFFLER (2 parts), plus 5 more brands. Quality grades include Standard Replacement and Economy.
2 parts on this 1957 Triumph TR3A page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including WJB / INMOTION PARTS WT15245 (Differential Pinion Bearing / Race) and ACDELCO AC15245 (Differential Pinion Bearing / Race). Click any part number to see every vehicle that part fits.
Differential Carrier Bearing / Race
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NB16283 | 🇺🇸 US | Race | View on Amazon |
| BCA | NB16150 | 🇺🇸 US | Rearwith Standard TS Axle(s) | View on Amazon |
| NATIONAL | 16283 | 🇺🇸 US | Race | View on Amazon |
This table covers the bearings and races that support the differential carrier.
3 Differential Carrier Bearing / Race parts for the 1957 Triumph TR3A come from 2 brands — BCA and NATIONAL.
Part numbers include BCA NB16283, BCA NB16150 and NATIONAL 16283.
Differential Pinion Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS Popular | WT15245 | 🇺🇸 US | Race | View on Amazon |
| WJB / INMOTION PARTS | WT15100 | 🇺🇸 US | Rear Outerwith Standard TS Axle | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | AC15245 | 🇺🇸 US 🇨🇦 CA | GoldRace Only | View on Amazon |
| BCA | NB15245 | 🇺🇸 US | Race Only | View on Amazon |
| BCA | NB15100 | 🇺🇸 US | Rear Outerwith Standard TS Axle(s) | View on Amazon |
| BCA | NB3120 | 🇺🇸 US | Race | View on Amazon |
This table covers the bearings and races on the differential pinion.
6 Differential Pinion Bearing / Race parts are listed for the 1957 Triumph TR3A, from BCA, WJB / INMOTION PARTS and ACDELCO. WJB / INMOTION PARTS WT15245 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 WT15245.
The Standard Replacement section lists 4 options from BCA and ACDELCO — built to original-equipment specification. ACDELCO AC15245 is listed in this group.
This group includes WJB / INMOTION PARTS WT15245, WJB / INMOTION PARTS WT15100 and ACDELCO AC15245 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 Standard TS 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 1957 Triumph TR3A come from 2 brands — SCHAEFFLER and WJB / INMOTION PARTS.
Part numbers include SCHAEFFLER SR3477 and WJB / INMOTION PARTS WS99149.
Differential Pinion Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER | SS2582 | 🇺🇸 US | Rear2.69" O.D. X 0.5" Width | View on Amazon |
| WJB / INMOTION PARTS | WS470487N | 🇺🇸 US | Rear Outerwith Standard TS 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 1957 Triumph TR3A come from 2 brands — SCHAEFFLER and WJB / INMOTION PARTS.
Part numbers include SCHAEFFLER SS2582 and WJB / INMOTION PARTS WS470487N.
Universal Joint
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DANA | 253214X | 🇺🇸 US | Spicer SelectGreasable | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DANA | 53214X | 🇺🇸 US | SpicerGreasable | View on Amazon |
| FVP | 2201100 | 🇺🇸 US | GreasableGrease Fitting in Cross | View on Amazon |
| GMB | 2201100 | 🇺🇸 US | GreasableGrease Fitting in Cross | View on Amazon |
This table covers the U-joints in the driveshaft.
4 Universal Joint parts for the 1957 Triumph TR3A come from 3 brands — DANA, FVP and GMB.
The Economy section: 1 option from DANA. DANA 253214X is listed in this group.
Standard Replacement: 3 parts, from DANA, FVP and GMB. A representative part number is DANA 53214X.
This group includes DANA 253214X, DANA 53214X and FVP 2201100 and the remaining parts above.
Buying Drivetrain Parts for a 1957 Triumph TR3A
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 2.0L 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 Universal Joint .
Frequently Asked Questions
How many drivetrain parts fit the 1957 Triumph TR3A?
Our catalog currently lists 17 drivetrain parts for the 1957 Triumph TR3A across 5 subcategories and 8 brands, covering the 2.0L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 1957 Triumph TR3A?
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 1957 Triumph TR3A 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 1957 Triumph TR3A?
Every part on this page is matched to the 2.0L 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 1957 Triumph TR3A
Drivetrain Parts for Other Triumph TR3A Years
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