This page lists 26 drivetrain parts for the 2021 Honda Ridgeline, across 7 part types, covering the 3.5L V6 engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 2021 Honda Ridgeline, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. 17 parts of the 26 listed are CV Axle (8 parts), Transfer Case Fluid (6 parts) and Axle Shaft Seal (3 parts). The other 4 part types cover the remaining 9 parts.
The 2021 Honda Ridgeline came with a single engine, the 3.5L V6, and every part is verified against it.
8 brands supply drivetrain parts for the 2021 Honda Ridgeline, led by VALVOLINE (6 parts), GSP (5 parts) and TRAKMOTIVE (4 parts), plus 5 more brands.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Honda Ridgeline. 4 parts have it, including TRAKMOTIVE HO86055 (CV Axle) and VALVOLINE VV820 (Transfer Case Fluid). Each part number opens a page with every vehicle that part fits.
Axle Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKF | 13702A | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
| TIMKEN | SL260478 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
| WJB / INMOTION PARTS | WS13702A | 🇺🇸 US 🇨🇦 CA | Rear1.378 Shaft Diameter | 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.
3 Axle Shaft Seal parts are listed for the 2021 Honda Ridgeline, from SKF, TIMKEN and WJB / INMOTION PARTS.
Part numbers include SKF 13702A, TIMKEN SL260478 and WJB / INMOTION PARTS WS13702A.
CV Axle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRAKMOTIVE Popular | HO86055 | 🇺🇸 US 🇨🇦 CA | AAR Joint Design | View on Amazon |
| TRAKMOTIVE Popular | HO86059 | 🇺🇸 US 🇨🇦 CA | AAR Joint Design | View on Amazon |
| GSP | NCV21057 | 🇺🇸 US 🇨🇦 CA | Rear Right | View on Amazon |
| GSP | NCV36241 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| GSP | NCV36240 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
| GSP | NCV21058 | 🇺🇸 US 🇨🇦 CA | Rear Left | View on Amazon |
| TRAKMOTIVE | HO86019 | 🇺🇸 US 🇨🇦 CA | Rear Left | View on Amazon |
| TRAKMOTIVE | HO8646 | 🇺🇸 US 🇨🇦 CA | Rear Right | 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.
8 CV Axle parts are listed for the 2021 Honda Ridgeline, from TRAKMOTIVE and GSP. TRAKMOTIVE HO86055 carries the "Popular" badge.
This group includes TRAKMOTIVE HO86055, TRAKMOTIVE HO86059 and GSP NCV21057 and the remaining parts above.
CV Intermediate Shaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GSP | NEX21004 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| TOP NOTCH | TN50099IS | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
This table covers the CV Intermediate shafts.
2 CV Intermediate Shaft parts for the 2021 Honda Ridgeline come from 2 brands — GSP and TOP NOTCH.
Part numbers include GSP NEX21004 and TOP NOTCH TN50099IS.
CV Joint Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 1032925 | 🇺🇸 US 🇨🇦 CA | Front Outer | View on Amazon |
| BECK/ARNLEY | 1033102 | 🇺🇸 US 🇨🇦 CA | Front Right Inner | View on Amazon |
| BECK/ARNLEY | 1033198 | 🇺🇸 US 🇨🇦 CA | Front Left Inner | View on Amazon |
This table covers the boots that keep grease in a CV joint. Typical signs include a split boot, grease flung around the joint, or a click once grit is inside. A boot caught early is a kit. Once the joint has clicked, the joint itself is usually worn.
BECK/ARNLEY supplies the 3 CV Joint Boot parts for the 2021 Honda Ridgeline.
This group includes BECK/ARNLEY 1032925, BECK/ARNLEY 1033102 and BECK/ARNLEY 1033198.
Transfer Case Fluid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular | VV820 | 🇺🇸 US 🇨🇦 CA | Daily Protection SAE 75W-90 Gear Oil1 Quart | View on Amazon |
| VALVOLINE Popular | VV975 | 🇺🇸 US 🇨🇦 CA | Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart | View on Amazon |
| VALVOLINE | 889785 | 🇺🇸 US 🇨🇦 CA | Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill | View on Amazon |
| VALVOLINE | 882505 | 🇺🇸 US 🇨🇦 CA | Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon | View on Amazon |
| VALVOLINE | 723856 | 🇺🇸 US 🇨🇦 CA | Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon | View on Amazon |
| VALVOLINE | VV822 | 🇺🇸 US 🇨🇦 CA | Daily Protection SAE 75W-90 Gear Oil16 Gallon KEG | View on Amazon |
This table covers the fluids specified for the transfer case. Typical signs include discolored fluid, a burnt smell, or a level that keeps dropping. Use only the specification in the notes — the tables group grades because they are not interchangeable.
VALVOLINE supplies the 6 Transfer Case Fluid parts for the 2021 Honda Ridgeline. VALVOLINE VV820 carries the "Popular" badge.
Listed part numbers: VALVOLINE VV820, VALVOLINE VV975 and VALVOLINE 889785, plus the other parts above.
Transfer Case Input Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKF | 18883A | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WJB / INMOTION PARTS | WS18883A | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the seals at the Transfer Case Input Shaft. 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 Transfer Case Input Shaft Seal parts for the 2021 Honda Ridgeline come from 2 brands — SKF and WJB / INMOTION PARTS.
This group includes SKF 18883A and WJB / INMOTION PARTS WS18883A.
Transfer Case Output Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKF | 16537A | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WJB / INMOTION PARTS | WS16537A | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the seals at the Transfer Case Output Shaft. 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 Transfer Case Output Shaft Seal parts are listed for the 2021 Honda Ridgeline, from SKF and WJB / INMOTION PARTS.
Listed part numbers: SKF 16537A and WJB / INMOTION PARTS WS16537A.
Buying Drivetrain Parts for a 2021 Honda Ridgeline
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 3.5L V6 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: CV Axle and Transfer Case Fluid .
Frequently Asked Questions
How many drivetrain parts fit the 2021 Honda Ridgeline?
Our catalog currently lists 26 drivetrain parts for the 2021 Honda Ridgeline across 7 subcategories and 8 brands, covering the 3.5L V6 engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 2021 Honda Ridgeline?
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 2021 Honda Ridgeline 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 2021 Honda Ridgeline?
Every part on this page is matched to the 3.5L V6 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 2021 Honda Ridgeline
Drivetrain Parts for Other Honda Ridgeline 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.