This page lists 21 drivetrain parts for the 1956 Desoto Fireflite, across 6 part types, covering the 5.4L 330cid V8 engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 1956 Desoto Fireflite, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. 16 parts of the 21 listed are Differential Pinion Bearing / Race (8 parts), Differential Carrier Bearing / Race (5 parts) and Differential Pinion Seal (3 parts). The other 3 part types cover the remaining 5 parts.
Every part on this page is matched to the 5.4L 330cid V8 — the only engine offered in the 1956 Desoto Fireflite.
The most listed brands for 1956 Desoto Fireflite drivetrain parts are WJB / INMOTION PARTS (9 parts), BCA (8 parts) and NATIONAL (2 parts), plus 2 more brands. Quality grades include Standard Replacement and Economy.
3 parts on this 1956 Desoto Fireflite page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including NATIONAL 25580 (Differential Carrier Bearing / Race) and WJB / INMOTION PARTS WTHM803110 (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 | WT25520 | 🇺🇸 US | RaceCup Outside Diameter (In): 3.2650000000000001 In | View on Amazon |
| WJB / INMOTION PARTS | WT25580 | 🇺🇸 US | Rearwith 8.75 IN Ring Gear | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NATIONAL Popular | 25580 | 🇺🇸 US | Rearwith 8.75 IN Ring Gear | View on Amazon |
| BCA | NB25520 | 🇺🇸 US | Race | View on Amazon |
| BCA | NB25580 | 🇺🇸 US | Rearwith Chrysler Axle(s) | View on Amazon |
This table covers the bearings and races that support the differential carrier.
5 Differential Carrier Bearing / Race parts for the 1956 Desoto Fireflite come from 3 brands — WJB / INMOTION PARTS, BCA and NATIONAL. The "Popular" part is NATIONAL 25580.
The Economy section lists 2 options from WJB / INMOTION PARTS — the catalog's value-priced group. WJB / INMOTION PARTS WT25520 is listed in this group.
In the Standard Replacement grade, BCA and NATIONAL supply 3 parts: built to original-equipment specification. A representative part number is NATIONAL 25580.
Listed part numbers: NATIONAL 25580, WJB / INMOTION PARTS WT25520 and WJB / INMOTION PARTS WT25580, plus the other parts above.
Differential Cover Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO | RDS6583 | 🇺🇸 US | Rearwith 8.75 (In) Ring Gear | View on Amazon |
| VICTOR REINZ | 711482500 | 🇺🇸 US | with 10 Bolt Holeswith Chrysler 8.75 IN Rear Axle | 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 for the 1956 Desoto Fireflite come from 2 brands — FEL-PRO and VICTOR REINZ.
This group includes FEL-PRO RDS6583 and VICTOR REINZ 711482500.
Differential Pinion Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS Popular | WTHM803110 | 🇺🇸 US | Race | View on Amazon |
| WJB / INMOTION PARTS Popular | WTHM89443 | 🇺🇸 US | Rear Outerwith 8.75 IN Ring Gear | View on Amazon |
| WJB / INMOTION PARTS | WTHM89410 | 🇺🇸 US | RaceCup Outside Diameter (mm): 76.2 MM | View on Amazon |
| WJB / INMOTION PARTS | WTHM803149 | 🇺🇸 US | Rear Innerwith 8.75 IN Ring Gear | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NBHM89410 | 🇺🇸 US | Race | View on Amazon |
| BCA | NBHM803110 | 🇺🇸 US | Race | View on Amazon |
| BCA | NBHM803149 | 🇺🇸 US | Rear Innerwith Chrysler Axle(s) | View on Amazon |
| BCA | NBHM89443 | 🇺🇸 US | Rear Outerwith Chrysler Axle(s) | View on Amazon |
This table covers the bearings and races on the differential pinion.
8 Differential Pinion Bearing / Race parts are listed for the 1956 Desoto Fireflite, from WJB / INMOTION PARTS and BCA. WJB / INMOTION PARTS WTHM803110 carries the "Popular" badge.
Economy: 4 parts, from WJB / INMOTION PARTS. A representative part number is WJB / INMOTION PARTS WTHM803110.
The Standard Replacement section: 4 options from BCA. BCA NBHM89410 is listed in this group.
Part numbers include WJB / INMOTION PARTS WTHM803110, WJB / INMOTION PARTS WTHM89443 and WJB / INMOTION PARTS WTHM89410, among others listed above.
Differential Pinion Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NS7216 | 🇺🇸 US | Rear Outerwith Chrysler Axle(s) | View on Amazon |
| NATIONAL | 7216 | 🇺🇸 US | Rear Outerwith 8.75 IN Ring Gear | View on Amazon |
| WJB / INMOTION PARTS | WS7216 | 🇺🇸 US | Rear Outerwith 8.75 IN Ring Gear | 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.
3 Differential Pinion Seal parts for the 1956 Desoto Fireflite come from 3 brands — BCA, NATIONAL and WJB / INMOTION PARTS.
Listed part numbers: BCA NS7216, NATIONAL 7216 and WJB / INMOTION PARTS WS7216.
Differential Rebuild Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS | WKRA300 | 🇺🇸 US | Rearwith 8.75 IN Ring Gear | View on Amazon |
This table covers kits that group the bearings, races and seals for a differential rebuild.
One part is listed for the 1956 Desoto Fireflite — WJB / INMOTION PARTS WKRA300.
Drive Shaft Center Support Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BCA | NB206S | 🇺🇸 US | View on Amazon | |
| WJB / INMOTION PARTS | RB6206Z | 🇺🇸 US | View on Amazon |
This table covers the Drive Shaft Center Support 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.
2 Drive Shaft Center Support Bearing parts are listed for the 1956 Desoto Fireflite, from BCA and WJB / INMOTION PARTS.
Part numbers include BCA NB206S and WJB / INMOTION PARTS RB6206Z.
Buying Drivetrain Parts for a 1956 Desoto Fireflite
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 5.4L 330cid 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 Carrier Bearing / Race .
Frequently Asked Questions
How many drivetrain parts fit the 1956 Desoto Fireflite?
Our catalog currently lists 21 drivetrain parts for the 1956 Desoto Fireflite across 6 subcategories and 5 brands, covering the 5.4L 330cid V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 1956 Desoto Fireflite?
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 1956 Desoto Fireflite 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 1956 Desoto Fireflite?
Every part on this page is matched to the 5.4L 330cid 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 1956 Desoto Fireflite
Drivetrain Parts for Other Desoto Fireflite Years
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