The 2018 Ram 4000 has one listed drivetrain part: a Differential Cover Gasket from FEL-PRO, covering the 5.7L V8 — the only engine offered in the 2018 Ram 4000. It includes a manufacturer part number and application notes.
On the 2018 Ram 4000, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.
The part number opens a page with every vehicle that part fits.
Differential Cover Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO | RDS55473 | 🇲🇽 MX | Rearwith 11.5 (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.
This group shows a single part: FEL-PRO RDS55473.
Buying Drivetrain Parts for a 2018 Ram 4000
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 5.7L 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 Cover Gasket .
Frequently Asked Questions
How many drivetrain parts fit the 2018 Ram 4000?
This page lists one drivetrain part for the 2018 Ram 4000: a Differential Cover Gasket from FEL-PRO, covering the 5.7L V8 engine.
What are the signs of drivetrain problems on a 2018 Ram 4000?
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 2018 Ram 4000 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 2018 Ram 4000?
Every part on this page is matched to the 5.7L 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 2018 Ram 4000
Drivetrain Parts for Other Ram 4000 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.