21 Drivetrain parts are listed for the 1980 Excalibur Phaeton, in 7 part types, covering the 5.0L 305cid V8 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 1980 Excalibur Phaeton, 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), Differential Pinion Seal (5 parts) and Differential Carrier Bearing / Race (2 parts). The other 4 part types cover the remaining 5 parts.
The 1980 Excalibur Phaeton came with a single engine, the 5.0L 305cid V8, and every part is verified against it.
7 brands supply drivetrain parts for the 1980 Excalibur Phaeton, led by WJB / INMOTION PARTS (8 parts), BCA (7 parts) and FAMOUS BRAND (2 parts), plus 4 more brands. Quality grades include Economy and Standard Replacement.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1980 Excalibur Phaeton. 3 parts have it, including WJB / INMOTION PARTS WTM86610 (Differential Pinion Bearing / Race) and WJB / INMOTION PARTS WS5778 (Differential Pinion Seal). Each part number opens a page with every vehicle that part fits.
Axle Shaft Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL | B2412 | 🇺🇸 US | Rearwith 8.5 IN Ring Gear | View on Amazon |
This table covers the Axle Shaft bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
This group shows a single part: NATIONAL B2412.
Differential Carrier Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WTA37 | 🇺🇸 US | Bearing & Race Set | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NBA37 | 🇺🇸 US | Bearing & Race SetIncludes Cup and Cone | View on Amazon |
This table covers the bearings and races that support the differential carrier.
2 Differential Carrier Bearing / Race parts are listed for the 1980 Excalibur Phaeton, from WJB / INMOTION PARTS and BCA.
In the Economy grade, WJB / INMOTION PARTS supplies 1 part: the catalog's value-priced group. A representative part number is WJB / INMOTION PARTS WTA37.
The Standard Replacement section lists 1 option from BCA — built to original-equipment specification. BCA NBA37 is listed in this group.
This group includes WJB / INMOTION PARTS WTA37 and BCA NBA37.
Differential Cover Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO | RDS55475 | 🇺🇸 US | Rearwith Spicer 44 Axle(S) | View on Amazon |
| VICTOR REINZ | 711644700 | 🇺🇸 US | Fits Rearwith 8.500 IN Ring Gear | View on Amazon |
This table covers the gaskets that seal the Differential Cover. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
2 Differential Cover Gasket parts are listed for the 1980 Excalibur Phaeton, from FEL-PRO and VICTOR REINZ.
Listed part numbers: FEL-PRO RDS55475 and VICTOR REINZ 711644700.
Differential Pinion Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS Popular | WTM86610 | 🇺🇸 US | RaceCup Outside Diameter (In): 2.5310000000000001 In | View on Amazon |
| FAMOUS BRAND | SHM88610 | 🇺🇸 US 🇨🇦 CA | RearInner | View on Amazon |
| FAMOUS BRAND | SM86610 | 🇺🇸 US 🇨🇦 CA | Race | View on Amazon |
| WJB / INMOTION PARTS | WTHM88610 | 🇺🇸 US | Cup Outside Diameter (In): 2.8439999999999999 InRace | View on Amazon |
| WJB / INMOTION PARTS | WTHM88649 | 🇺🇸 US | Rear Innerwith 8.5 IN Ring Gear | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA Popular | NBM86610 | 🇺🇸 US | Race | View on Amazon |
| BCA | NBHM88610 | 🇺🇸 US | Race | View on Amazon |
| BCA | NBHM88649 | 🇺🇸 US | Bearing Shape: Cylindrical | View on Amazon |
| BCA | NBM86647 | 🇺🇸 US | Rear Outerwith Spicer 44 Axle(S) | View on Amazon |
This table covers the bearings and races on the differential pinion.
9 Differential Pinion Bearing / Race parts for the 1980 Excalibur Phaeton come from 3 brands — BCA, WJB / INMOTION PARTS and FAMOUS BRAND. The "Popular" part is WJB / INMOTION PARTS WTM86610.
The Economy section: 5 options from WJB / INMOTION PARTS and FAMOUS BRAND. WJB / INMOTION PARTS WTM86610 is listed in this group.
Standard Replacement: 4 parts, from BCA. A representative part number is BCA NBM86610.
Listed part numbers: WJB / INMOTION PARTS WTM86610, FAMOUS BRAND SHM88610 and FAMOUS BRAND SM86610, plus the other parts above.
Differential Pinion Repair Sleeve
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WS99155 | 🇺🇸 US | Rear Outerwith 8.5 IN Ring Gear | View on Amazon |
This table covers the wear sleeves used to restore a grooved pinion seal surface.
One part is listed for the 1980 Excalibur Phaeton — WJB / INMOTION PARTS WS99155.
Differential Pinion Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS Popular | WS5778 | 🇺🇸 US | Nitrile | View on Amazon |
| BCA | NS5778 | 🇺🇸 US | Nitrile | View on Amazon |
| BCA | NS5778V | 🇺🇸 US | Viton | View on Amazon |
| SCHAEFFLER | SS2633 | 🇺🇸 US | Rear16.891 mm Width | View on Amazon |
| WJB / INMOTION PARTS | WS5778V | 🇺🇸 US | Rear OuterViton Type | 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 are listed for the 1980 Excalibur Phaeton, from WJB / INMOTION PARTS, BCA and SCHAEFFLER. WJB / INMOTION PARTS WS5778 carries the "Popular" badge.
Listed part numbers: WJB / INMOTION PARTS WS5778, BCA NS5778 and BCA NS5778V, plus the other parts above.
Differential Rebuild Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WKRA339 | 🇺🇸 US | Rearwith 8.5 IN Ring Gear | View on Amazon |
This table covers kits that group the bearings, races and seals for a differential rebuild.
This group shows a single part: WJB / INMOTION PARTS WKRA339.
Buying Drivetrain Parts for a 1980 Excalibur Phaeton
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 5.0L 305cid 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 Differential Pinion Seal .
Frequently Asked Questions
How many drivetrain parts fit the 1980 Excalibur Phaeton?
Our catalog currently lists 21 drivetrain parts for the 1980 Excalibur Phaeton across 7 subcategories and 7 brands, covering the 5.0L 305cid V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 1980 Excalibur Phaeton?
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 1980 Excalibur Phaeton 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 1980 Excalibur Phaeton?
Every part on this page is matched to the 5.0L 305cid 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 1980 Excalibur Phaeton
Drivetrain Parts for Other Excalibur Phaeton Years
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