This page lists 14 drivetrain parts for the 2018 Acura RLX, across 5 part types, covering both the 3.5L V6 and the 3.5L V6 ELECTRIC/GAS. Every part shows its brand, manufacturer part number and fitment notes.
The drivetrain system on the 2018 Acura RLX moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. The largest groups are Gear Oil (7 parts), CV Axle (3 parts) and Axle Shaft Seal (2 parts). The other 2 part types cover the remaining 2 parts.
The 2018 Acura RLX was sold with both the 3.5L V6 and the 3.5L V6 ELECTRIC/GAS. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2018 Acura RLX drivetrain parts are TRAKMOTIVE (4 parts), VALVOLINE (4 parts) and SKF (2 parts), plus 3 more brands.
2 parts on this 2018 Acura RLX page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including ACDELCO 109243 (Gear Oil) and VALVOLINE VV3246 (Gear Oil). Click any part number to see every vehicle that part fits.
Axle Shaft Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKF Fits: 3.5L V6 ELECTRIC/GAS | SC0889 | 🇺🇸 US 🇨🇦 CA | Front | 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.
One part is listed for the 2018 Acura RLX — SKF SC0889.
Axle Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKF Fits: 3.5L V6 ELECTRIC/GAS | 16541A | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
| WJB / INMOTION PARTS Fits: 3.5L V6 ELECTRIC/GAS | WS16541A | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
This table covers the seals where an axle shaft exits the housing. 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.
2 Axle Shaft Seal parts for the 2018 Acura RLX come from 2 brands — SKF and WJB / INMOTION PARTS.
Part numbers include SKF 16541A and WJB / INMOTION PARTS WS16541A.
CV Axle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRAKMOTIVE Fits: 3.5L V6 ELECTRIC/GAS | HO8800 | 🇺🇸 US 🇨🇦 CA | AAR Joint Design | View on Amazon |
| TRAKMOTIVE Fits: 3.5L V6 ELECTRIC/GAS | HO8699 | 🇺🇸 US 🇨🇦 CA | AAR Joint Design | View on Amazon |
| TRAKMOTIVE Fits: 3.5L V6 ELECTRIC/GAS | HO8695 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
This table covers the complete CV axle shafts from differential (or hub) to wheel. Typical signs include a click in tight turns, grease flung around the wheel well, or a vibration that builds with speed. A torn boot caught early is a boot kit; caught late it is the whole axle. Torque the axle nut to the method in the notes.
3 CV Axle parts for the 2018 Acura RLX come from TRAKMOTIVE.
Listed part numbers: TRAKMOTIVE HO8800, TRAKMOTIVE HO8699 and TRAKMOTIVE HO8695.
CV Intermediate Shaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRAKMOTIVE Fits: 3.5L V6 ELECTRIC/GAS | HO3530 | 🇺🇸 US 🇨🇦 CA | Front | View on Amazon |
This table covers the CV Intermediate shafts.
One part is listed for the 2018 Acura RLX — TRAKMOTIVE HO3530.
Gear Oil
Dexron
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: 3.5L V6 ELECTRIC/GAS | 109243 | 🇺🇸 US | Container Type: Plastic Container | View on Amazon |
Multi-Vehicle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: 3.5L V6 ELECTRIC/GAS | VV3246 | 🇺🇸 US 🇨🇦 CA | Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Quart | View on Amazon |
| LUCAS OIL Fits: 3.5L V6 ELECTRIC/GAS | 11255 | 🇺🇸 US 🇨🇦 CA | LOW VISCOSITY SYNTHETIC MULTI-VEHICLE AUTOMATIC TRANSMISSION FLUID1 qt | View on Amazon |
| LUCAS OIL Fits: 3.5L V6 ELECTRIC/GAS | 18037 | 🇺🇸 US 🇨🇦 CA | Low Viscosity Synthetic Multi-Vehicle Automatic Transmission Fluid6 Gallon | View on Amazon |
| VALVOLINE Fits: 3.5L V6 ELECTRIC/GAS | 773775 | 🇺🇸 US 🇨🇦 CA | Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Gallon | View on Amazon |
| VALVOLINE Fits: 3.5L V6 ELECTRIC/GAS | 881051 | 🇺🇸 US 🇨🇦 CA | Maxlife Multi-Vehicle Full Synthetic ATF5 Gallon Bay Box | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 3.5L V6 ELECTRIC/GAS | 899179 | 🇺🇸 US 🇨🇦 CA | Extended Protection Full Synthetic ATF1 Quart | View on Amazon |
This table covers the gear oils specified for the axle or transfer case. Typical signs include a low-oil lamp, knocking, or oil that has gone thin before the next interval. Match the viscosity and spec in the notes, not just the weight on the bottle.
7 Gear Oil parts for the 2018 Acura RLX come from 3 brands — VALVOLINE, LUCAS OIL and ACDELCO. The "Popular" part is ACDELCO 109243.
The Dexron section lists 1 option from ACDELCO — grouped under the catalog's "Dexron" designation — the notes column spells out what sets them apart. ACDELCO 109243 is listed in this group.
The Multi-Vehicle section lists 5 options from VALVOLINE and LUCAS OIL — grouped under the catalog's "Multi-Vehicle" designation — the notes column spells out what sets them apart. VALVOLINE VV3246 is listed in this group.
1 further part sits outside the graded sections, with the same engine-level match.
Listed part numbers: ACDELCO 109243, VALVOLINE VV3246 and LUCAS OIL 11255, plus the other parts above.
Buying Drivetrain Parts for a 2018 Acura RLX
On this vehicle, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.
- Match the engine first. Every drivetrain part here is engine-specific; each row shows which engine(s) it fits.
- 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: Gear Oil and CV Axle .
Frequently Asked Questions
How many drivetrain parts fit the 2018 Acura RLX?
Our catalog currently lists 14 drivetrain parts for the 2018 Acura RLX across 5 subcategories and 6 brands, covering both the 3.5L V6 and the 3.5L V6 ELECTRIC/GAS. Each part is matched to the engine(s) it fits.
Do drivetrain parts differ between 2018 Acura RLX engines?
Yes. Every drivetrain part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of drivetrain problems on a 2018 Acura RLX?
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 Acura RLX 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 Acura RLX?
First match the engine — each row shows which engine(s) the part fits. 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 Acura RLX
Drivetrain Parts for Other Acura RLX Years
Switch vehicle or jump to a subcategory
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.