This page lists 28 drivetrain parts for the 1981 Triumph TR8, across 5 part types, covering the 3.5L V8 engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 1981 Triumph TR8, 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), Universal Joint (8 parts) and Differential Carrier Bearing / Race (6 parts). The other 2 part types cover the remaining 5 parts.
The 1981 Triumph TR8 came with a single engine, the 3.5L V8, and every part is verified against it.
11 brands supply drivetrain parts for the 1981 Triumph TR8, led by TIMKEN (6 parts), WJB / INMOTION PARTS (5 parts) and BCA (4 parts), plus 8 more brands. Quality grades include Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1981 Triumph TR8. 6 parts have it, including TIMKEN SET16 (Differential Carrier Bearing / Race) and WJB / INMOTION PARTS WTHM88649 (Differential Pinion Bearing / Race). Each part number opens a page with every vehicle that part fits.
Differential Carrier Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WTA13 | 🇺🇸 US 🇨🇦 CA | Bearing & Race Set | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TIMKEN Popular | SET16 | 🇺🇸 US 🇨🇦 CA | Bearing & Race Set | View on Amazon |
| TIMKEN Popular | SET13 | 🇺🇸 US 🇨🇦 CA | Bearing & Race Set | View on Amazon |
| BCA | NBA13 | 🇺🇸 US 🇨🇦 CA | Bearing & Race SetIncludes Cup and Cone | View on Amazon |
| NSK | TRB13 | 🇺🇸 US 🇨🇦 CA | Bearing & Race SetKit Contents: 1 Cup, 1 Cone | View on Amazon |
| NSK | L68149 | 🇺🇸 US 🇨🇦 CA | Inside Diameter: 35 MMWidth, Outer Race: 16.76 mm | 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 1981 Triumph TR8, from TIMKEN, NSK, WJB / INMOTION PARTS and 1 other brand. TIMKEN SET16 carries the "Popular" badge.
In the Economy grade, WJB / INMOTION PARTS supplies 1 part: the catalog's value-priced group. A representative part number is WJB / INMOTION PARTS WTA13.
The Standard Replacement section lists 5 options from TIMKEN, NSK and BCA — built to original-equipment specification. TIMKEN SET16 is listed in this group.
This group includes TIMKEN SET16, WJB / INMOTION PARTS WTA13 and TIMKEN SET13 and the remaining parts above.
Differential Pinion Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS Popular | WTHM88649 | 🇺🇸 US 🇨🇦 CA | Rear Outerwith Standard CM Axle | View on Amazon |
| AUTO EXTRA | M84548 | 🇺🇸 US 🇨🇦 CA | RearOuter | View on Amazon |
| FAMOUS BRAND | SHM88610 | 🇺🇸 US 🇨🇦 CA | RearOuter | View on Amazon |
| WJB / INMOTION PARTS | WTHM88610 | 🇺🇸 US 🇨🇦 CA | Cup Outside Diameter (In): 2.8439999999999999 InRace | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TIMKEN Popular | M88010 | 🇺🇸 US 🇨🇦 CA | Race | View on Amazon |
| BCA | NBHM88610 | 🇺🇸 US 🇨🇦 CA | Race | View on Amazon |
| BCA | NBHM88649 | 🇺🇸 US 🇨🇦 CA | Bearing Shape: Cylindrical | View on Amazon |
| TIMKEN | M88046 | 🇺🇸 US 🇨🇦 CA | Rear Outer | View on Amazon |
| TIMKEN | M88040 | 🇺🇸 US 🇨🇦 CA | Rear Inner | View on Amazon |
This table covers the bearings and races on the differential pinion.
9 Differential Pinion Bearing / Race parts for the 1981 Triumph TR8 come from 5 brands — TIMKEN, WJB / INMOTION PARTS, BCA and 2 other brands. The "Popular" part is WJB / INMOTION PARTS WTHM88649.
The Economy section: 4 options from WJB / INMOTION PARTS, AUTO EXTRA and FAMOUS BRAND. WJB / INMOTION PARTS WTHM88649 is listed in this group.
Standard Replacement: 5 parts, from TIMKEN and BCA. A representative part number is TIMKEN M88010.
This group includes WJB / INMOTION PARTS WTHM88649, AUTO EXTRA M84548 and FAMOUS BRAND SHM88610 and the remaining parts above.
Differential Pinion Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WS99114 | 🇺🇸 US 🇨🇦 CA | Rear Outerwith Standard CM Axle | View on Amazon |
This table covers the wear sleeves used to restore a grooved pinion seal surface.
One part is listed for the 1981 Triumph TR8 — WJB / INMOTION PARTS WS99114.
Differential Pinion Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NS223020 | 🇺🇸 US 🇨🇦 CA | Rear Outerwith Standard CM Axle(s) | View on Amazon |
| SCHAEFFLER | SS2283 | 🇺🇸 US 🇨🇦 CA | Rear1.85" I:D X 1.86" O.D. X 0.28" Width | View on Amazon |
| TIMKEN | 223020 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
| WJB / INMOTION PARTS | WS223020 | 🇺🇸 US 🇨🇦 CA | Rear Outerwith Standard CM 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.
4 Differential Pinion Seal parts are listed for the 1981 Triumph TR8, from BCA, SCHAEFFLER, TIMKEN and 1 other brand.
Listed part numbers: BCA NS223020, SCHAEFFLER SS2283 and TIMKEN 223020, plus the other parts above.
Universal Joint
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GMB Popular | 2200500 | 🇺🇸 US 🇨🇦 CA | GreasableGrease Fitting in Cross | View on Amazon |
| MOOG Popular | 341 | 🇺🇸 US 🇨🇦 CA | Fits Rear Driveshaft at Rear AxleExcept Short Grease Fitting | View on Amazon |
| FVP | 2200500 | 🇺🇸 US 🇨🇦 CA | GreasableGrease Fitting in Cross | View on Amazon |
| FVP | 2200600 | 🇺🇸 US 🇨🇦 CA | GreasableGrease Fitting in Bearing Cap | View on Amazon |
| GMB | 2200600 | 🇺🇸 US 🇨🇦 CA | GreasableGrease Fitting in Bearing Cap | View on Amazon |
| GMB | 2150500 | 🇺🇸 US 🇨🇦 CA | Joint | View on Amazon |
| MOOG | 341BL | 🇺🇸 US 🇨🇦 CA | Fits Rear Driveshaft at Rear Axlewith Short Grease Fitting | View on Amazon |
| SKF | UJ341 | 🇺🇸 US 🇨🇦 CA | Greaseable | View on Amazon |
This table covers the U-joints in the driveshaft.
8 Universal Joint parts are listed for the 1981 Triumph TR8, from GMB, MOOG, FVP and 1 other brand. GMB 2200500 carries the "Popular" badge.
Part numbers include GMB 2200500 and MOOG 341, among others listed above.
Buying Drivetrain Parts for a 1981 Triumph TR8
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 3.5L 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 Universal Joint .
Frequently Asked Questions
How many drivetrain parts fit the 1981 Triumph TR8?
Our catalog currently lists 28 drivetrain parts for the 1981 Triumph TR8 across 5 subcategories and 11 brands, covering the 3.5L V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 1981 Triumph TR8?
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 1981 Triumph TR8 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 1981 Triumph TR8?
Every part on this page is matched to the 3.5L 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 1981 Triumph TR8
Drivetrain Parts for Other Triumph TR8 Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.