This page lists 44 drivetrain parts for the 1978 Triumph TR7, across 5 part types, covering the 2.0L L4 engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 1978 Triumph TR7, 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 (18 parts), Differential Carrier Bearing / Race (13 parts) and Universal Joint (6 parts). The other 2 part types cover the remaining 7 parts.
Every part on this page is matched to the 2.0L L4 — the only engine offered in the 1978 Triumph TR7.
The most listed brands for 1978 Triumph TR7 drivetrain parts are TIMKEN (10 parts), SKF (9 parts) and WJB / INMOTION PARTS (6 parts), plus 7 more brands. Quality grades include Standard Replacement and Economy.
10 parts on this 1978 Triumph TR7 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including BCA NBA6 (Differential Carrier Bearing / Race) and WJB / INMOTION PARTS WTHM88649 (Differential Pinion Bearing / Race). Click any part number to see every vehicle that part fits.
Differential Carrier Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WTL68110 | 🇺🇸 US 🇨🇦 CA | Race | View on Amazon |
| WJB / INMOTION PARTS | WTA13 | 🇺🇸 US 🇨🇦 CA | Bearing & Race Set | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA Popular | NBA6 | 🇺🇸 US 🇨🇦 CA | Bearing & Race SetIncludes Cup and Cone | View on Amazon |
| 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 |
| SCHAEFFLER | L68110 | 🇺🇸 US 🇨🇦 CA | Race Only | View on Amazon |
| SCHAEFFLER | KT13 | 🇺🇸 US 🇨🇦 CA | Bearing and Race Set | View on Amazon |
| SCHAEFFLER | KL68149 | 🇺🇸 US 🇨🇦 CA | Rear16.764 mm Width | View on Amazon |
| SKF | L68110VP | 🇺🇸 US 🇨🇦 CA | Race | View on Amazon |
| SKF | BR13 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
This table covers the bearings and races that support the differential carrier.
13 Differential Carrier Bearing / Race parts for the 1978 Triumph TR7 come from 6 brands — SCHAEFFLER, WJB / INMOTION PARTS, BCA and 3 other brands. The "Popular" part is BCA NBA6.
The Economy section lists 2 options from WJB / INMOTION PARTS — the catalog's value-priced group. WJB / INMOTION PARTS WTL68110 is listed in this group.
In the Standard Replacement grade, SCHAEFFLER, BCA, TIMKEN and 2 other brands supply 11 parts: built to original-equipment specification. A representative part number is BCA NBA6.
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 |
| 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 |
| TIMKEN Popular | HM88610 | 🇺🇸 US 🇨🇦 CA | Race | View on Amazon |
| TIMKEN Popular | HM88649 | 🇺🇸 US 🇨🇦 CA | Cone | View on Amazon |
| BCA | NBHM88610 | 🇺🇸 US 🇨🇦 CA | Race | View on Amazon |
| BCA | NBHM88649 | 🇺🇸 US 🇨🇦 CA | Bearing Shape: Cylindrical | View on Amazon |
| SCHAEFFLER | HM88610 | 🇺🇸 US 🇨🇦 CA | Race | View on Amazon |
| SCHAEFFLER | KHM88649 | 🇺🇸 US 🇨🇦 CA | Rear Inner25.4 mm Width | View on Amazon |
| SKF | M84510 | 🇺🇸 US 🇨🇦 CA | Rear Outer5 speed trans. | View on Amazon |
| SKF | M84510VP | 🇺🇸 US 🇨🇦 CA | Race | View on Amazon |
| SKF | M84548 | 🇺🇸 US 🇨🇦 CA | Rear Outer5 speed trans. | View on Amazon |
| SKF | M84548VP | 🇺🇸 US 🇨🇦 CA | with 1.0000 In. Bearing Inside Diameter | View on Amazon |
| TIMKEN | M84510 | 🇺🇸 US 🇨🇦 CA | Race | View on Amazon |
| TIMKEN | M88046 | 🇺🇸 US 🇨🇦 CA | Rear OuterIntegral Carrier | View on Amazon |
| TIMKEN | M88040 | 🇺🇸 US 🇨🇦 CA | Rear InnerRemovable Carrier | View on Amazon |
| TIMKEN | M84548 | 🇺🇸 US 🇨🇦 CA | Rear OuterRemovable Carrier | View on Amazon |
This table covers the bearings and races on the differential pinion.
18 Differential Pinion Bearing / Race parts are listed for the 1978 Triumph TR7, from TIMKEN, SKF, WJB / INMOTION PARTS and 3 other brands. WJB / INMOTION PARTS WTHM88649 carries the "Popular" badge.
Economy: 3 parts, from WJB / INMOTION PARTS and FAMOUS BRAND. A representative part number is WJB / INMOTION PARTS WTHM88649.
The Standard Replacement section: 15 options from TIMKEN, SKF, BCA and 1 other brand. TIMKEN M88010 is listed in this group.
Differential Pinion Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKF | 99114 | 🇺🇸 US 🇨🇦 CA | Shaft Diameter: 1.181 In | View on Amazon |
| 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.
2 Differential Pinion Repair Sleeve parts for the 1978 Triumph TR7 come from 2 brands — SKF and WJB / INMOTION PARTS.
Part numbers include SKF 99114 and WJB / INMOTION PARTS WS99114.
Differential Pinion Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS Popular | WS223020 | 🇺🇸 US 🇨🇦 CA | Rear Outerwith Standard CM Axle | View on Amazon |
| 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 |
| SKF | 11625 | 🇺🇸 US 🇨🇦 CA | RearManual trans. | View on Amazon |
| TIMKEN | 223020 | 🇺🇸 US 🇨🇦 CA | RearIntegral Carrier | 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.
5 Differential Pinion Seal parts for the 1978 Triumph TR7 come from 5 brands — WJB / INMOTION PARTS, BCA, SCHAEFFLER and 2 other brands. The "Popular" part is WJB / INMOTION PARTS WS223020.
This group includes WJB / INMOTION PARTS WS223020, BCA NS223020 and SCHAEFFLER SS2283 and the remaining parts above.
Universal Joint
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DANA | 25101X | 🇺🇸 US 🇨🇦 CA | Spicer SelectNon-Greasable | View on Amazon |
Standard Replacement
| 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 |
| DANA | 5101X | 🇺🇸 US 🇨🇦 CA | SpicerNon-Greasable | View on Amazon |
| GMB | 2200600 | 🇺🇸 US 🇨🇦 CA | GreasableGrease Fitting in Bearing Cap | View on Amazon |
| SKF | UJ341 | 🇺🇸 US 🇨🇦 CA | Greaseable | View on Amazon |
This table covers the U-joints in the driveshaft.
6 Universal Joint parts for the 1978 Triumph TR7 come from 4 brands — DANA, GMB, MOOG and 1 other brand. The "Popular" part is GMB 2200500.
The Economy section: 1 option from DANA. DANA 25101X is listed in this group.
Standard Replacement: 5 parts, from GMB, MOOG, DANA and 1 other brand. A representative part number is GMB 2200500.
This group includes GMB 2200500, DANA 25101X and MOOG 341 and the remaining parts above.
Buying Drivetrain Parts for a 1978 Triumph TR7
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 Differential Carrier Bearing / Race .
Frequently Asked Questions
How many drivetrain parts fit the 1978 Triumph TR7?
Our catalog currently lists 44 drivetrain parts for the 1978 Triumph TR7 across 5 subcategories and 10 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 1978 Triumph TR7?
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 1978 Triumph TR7 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 1978 Triumph TR7?
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 1978 Triumph TR7
Drivetrain Parts for Other Triumph TR7 Years
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