18 Suspension parts are listed for the 2021 Ram 4000, in 7 part types, covering both the 5.7L V8 and the 6.4L V8. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 Ram 4000, the suspension system controls ride, tire contact and alignment through shocks, struts, control arms, bushings and links. Most of the listed parts are Ball Joint (9 parts), Track Bar Bushing (3 parts) and Sway Bar Link (2 parts). The other 4 part types cover the remaining 4 parts.
The 2021 Ram 4000 was sold with both the 5.7L V8 and the 6.4L V8. 17 parts fit every engine; the other 1 is engine-specific. Each part shows which engine(s) it fits.
3 brands supply suspension parts for the 2021 Ram 4000, led by DORMAN (13 parts), FVP (4 parts) and VAICO (1 part). Quality grades include Daily Driver and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Ram 4000. 2 parts have it, including DORMAN 539950 (Ball Joint) and DORMAN BJ83335RD (Ball Joint). Each part number opens a page with every vehicle that part fits.
Axle Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 4000 engines | 533899 | 🇲🇽 MX | Fits Front ForwardAt Axle Housing | View on Amazon |
This table covers the Axle bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.
This group shows a single part: DORMAN 533899.
Ball Joint
Daily Driver
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: all 2021 4000 engines | 539950 | 🇲🇽 MX | Front UpperNon-Articulating Stud - Stud Moves Up and Down | View on Amazon |
| DORMAN Popular Fits: all 2021 4000 engines | BJ83335RD | 🇲🇽 MX | RD | View on Amazon |
| DORMAN Fits: all 2021 4000 engines | 539974 | 🇲🇽 MX | Front Lower | View on Amazon |
| DORMAN Fits: all 2021 4000 engines | 539941 | 🇲🇽 MX | Front UpperNon-Articulating Stud - Stud Moves Up and Down | View on Amazon |
| DORMAN Fits: all 2021 4000 engines | BJ81116RD | 🇲🇽 MX | RD | View on Amazon |
| DORMAN Fits: all 2021 4000 engines | 539942 | 🇲🇽 MX | Adjustable | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: all 2021 4000 engines | BJ81046 | 🇲🇽 MX | Front UpperNon-Articulating Stud - Stud Moves Up and Down | View on Amazon |
| FVP Fits: all 2021 4000 engines | BJ81116 | 🇲🇽 MX | Front UpperNon-Articulating Stud - Stud Moves Up and Down | View on Amazon |
| FVP Fits: all 2021 4000 engines | BJ81056 | 🇲🇽 MX | Adjustable | View on Amazon |
This table covers the ball joints that articulate each control arm at the knuckle.
9 Ball Joint parts are listed for the 2021 Ram 4000, from DORMAN and FVP. DORMAN 539950 carries the "Popular" badge. All of them fit every engine offered in the 2021 4000.
The Daily Driver section lists 6 options from DORMAN — grouped for everyday commuting duty. DORMAN 539950 is listed in this group.
In the Economy grade, FVP supplies 3 parts: the catalog's value-priced group. A representative part number is FVP BJ81046.
This group includes DORMAN 539950, DORMAN BJ83335RD and DORMAN 539974 and the remaining parts above.
Control Arm Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 4000 engines | 533899 | 🇲🇽 MX | Fits Front ForwardAt Axle Housing | View on Amazon |
This table covers the bushings pressed into each control arm. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.
One part is listed for the 2021 Ram 4000 — DORMAN 533899.
Hydraulic System Fluid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VAICO Fits: 6.4L V8 | V600018 | 🇲🇽 MX | Grade: AMVA-002-SYNT 1 Liter | View on Amazon |
This table covers the Hydraulic System fluids. 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.
This group shows a single part: VAICO V600018.
Sway Bar Link
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 4000 engines | 542599 | 🇲🇽 MX | Rear | View on Amazon |
| DORMAN Fits: all 2021 4000 engines | 542593 | 🇲🇽 MX | Front | View on Amazon |
This table covers the links that connect the anti-roll bar to each control arm or strut. Typical signs include a clunk on one wheel over a driveway, or a rattle that goes away when you lean on the bar. Replace links in pairs; a seized stud often takes the bushing with it.
DORMAN supplies both parts for the 2021 Ram 4000. All of them fit every engine offered in the 2021 4000.
Part numbers include DORMAN 542599 and DORMAN 542593.
Track Bar
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 4000 engines | 543259 | 🇲🇽 MX | Front | View on Amazon |
This table covers the track bars that locate the axle laterally.
This group shows a single part: DORMAN 543259.
Track Bar Bushing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 4000 engines | 540790 | 🇲🇽 MX | FrontBushing Only | View on Amazon |
| DORMAN Fits: all 2021 4000 engines | 540799 | 🇲🇽 MX | Kit | View on Amazon |
| FVP Fits: all 2021 4000 engines | BTK81239 | 🇲🇽 MX | Kit | View on Amazon |
This table covers the Track Bar bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.
3 Track Bar Bushing parts for the 2021 Ram 4000 come from 2 brands — DORMAN and FVP. Every part fits both the 5.7L V8 and the 6.4L V8.
Part numbers include DORMAN 540790, DORMAN 540799 and FVP BTK81239.
Buying Suspension Parts for a 2021 Ram 4000
On this vehicle, the suspension system controls ride, tire contact and alignment through shocks, struts, control arms, bushings and links.
- Match the engine first. Some suspension parts fit every engine; others are 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 shocks and struts in axle pairs, renew the sway-bar links with the struts, and get an alignment after any control-arm or tie-rod work.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Ball Joint and Track Bar Bushing .
Frequently Asked Questions
How many suspension parts fit the 2021 Ram 4000?
Our catalog currently lists 18 suspension parts for the 2021 Ram 4000 across 7 subcategories and 3 brands, covering both the 5.7L V8 and the 6.4L V8. Each part is matched to the engine(s) it fits.
Do suspension parts differ between 2021 Ram 4000 engines?
Some do. 17 parts fit every engine; the other 1 is engine-specific. Each row (and the filter at the top) shows which. 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 suspension problems on a 2021 Ram 4000?
Common symptoms include clunks over speed bumps, wandering steering, cupped tire wear, or a nose that keeps bouncing after a dip. 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 shocks and struts in axle pairs, renew the sway-bar links with the struts, and get an alignment after any control-arm or tie-rod work.
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 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 2021 Ram 4000?
First match the engine — each row shows which engine(s) the part fits. Then worn bushings often mimic bad shocks — inspect before buying, and remember loaded vs unloaded strut assemblies differ in labor by hours. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Ram 4000
Suspension Parts for Other Ram 4000 Years
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