The 2020 Ram 4000 has 23 automatic transmission parts with verified fitment on this page — 10 part types and 9 brands, covering both the 5.7L V8 and the 6.4L V8. Each part includes a manufacturer part number and application notes.
The automatic transmission on the 2020 Ram 4000 covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts. The largest groups are Transmission Fluid Additive (5 parts), Solenoid Switch Valve Plug (4 parts) and Fluid Pan Gasket (3 parts). The other 7 part types cover the remaining 11 parts.
The 2020 Ram 4000 was sold with both the 5.7L V8 and the 6.4L V8. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
9 brands supply automatic transmission parts for the 2020 Ram 4000, led by LUBEGARD (5 parts), TRANSGO (4 parts) and ELRING (3 parts), plus 6 more brands.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2020 Ram 4000. 1 part has it: LUBEGARD 19610 (Transmission Fluid Additive). Each part number opens a page with every vehicle that part fits.
Components
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SONNAX Fits: 6.4L V8 | RFERC1 | 🇲🇽 MX | RFE Transducer Connector | View on Amazon |
| SONNAX Fits: 6.4L V8 | 4483602K | 🇲🇽 MX | Solenoid Spacer & Service Kit | View on Amazon |
This table covers the related components grouped with this assembly.
SONNAX supplies both parts for the 2020 Ram 4000.
Part numbers include SONNAX RFERC1 and SONNAX 4483602K.
Filter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING Fits: 6.4L V8 | B46460 | 🇲🇽 MX | View on Amazon |
This table covers the replacement filters for this application — the table heading and notes say which circuit. Typical signs include restricted flow — long cranking, weak airflow, or dirty fluid after a short interval. Seat the new filter so it cannot bypass, and use the grade the notes call for.
One part is listed for the 2020 Ram 4000 — ELRING B46460.
Fluid Cooler
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.4L V8 | 918411 | 🇲🇽 MX | View on Amazon |
This table covers the heat exchangers that cool transmission fluid. Typical signs include fluid that overheats, a leak at the cooler fittings, or milky fluid that says coolant and ATF have mixed. Flush the lines when you replace a cooler. Cross-contamination is how a small leak becomes a transmission job.
One part is listed for the 2020 Ram 4000 — DORMAN 918411.
Fluid Pan
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.4L V8 | 265870 | 🇲🇽 MX | OE FIX | View on Amazon |
| ELRING Fits: 6.4L V8 | 224210 | 🇲🇽 MX | with Seal | View on Amazon |
This table covers the pans that hold automatic-transmission fluid.
2 Fluid Pan parts for the 2020 Ram 4000 come from 2 brands — DORMAN and ELRING.
This group includes DORMAN 265870 and ELRING 224210.
Fluid Pan Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ELRING Fits: 6.4L V8 | 186400 | 🇲🇽 MX | with Trans.: 8-Speed Automatic Transmission | View on Amazon |
| TRANSTEC Fits: 6.4L V8 | 49444827 | 🇲🇽 MX | Crew45RFE, 5-45RFE, 65RFE | View on Amazon |
| VICTOR REINZ Fits: 6.4L V8 | 711953900 | 🇲🇽 MX | Enhanced Design | View on Amazon |
This table covers the gaskets that seal the Fluid Pan. 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.
3 Fluid Pan Gasket parts are listed for the 2020 Ram 4000, from ELRING, TRANSTEC and VICTOR REINZ.
Part numbers include ELRING 186400, TRANSTEC 49444827 and VICTOR REINZ 711953900.
Solenoid Switch Valve Plug
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRANSGO Fits: 6.4L V8 | RFESV420NT | 🇲🇽 MX | Solenoid Switch Valve Repair KitWithout Tools | View on Amazon |
| TRANSGO Fits: 6.4L V8 | RFESV453NT | 🇲🇽 MX | Solenoid Switch Valve Repair KitWithout Tools | View on Amazon |
| TRANSGO Fits: 6.4L V8 | RFESV420WT | 🇲🇽 MX | Solenoid Switch Valve Repair KitWith Tools | View on Amazon |
| TRANSGO Fits: 6.4L V8 | RFESV453WT | 🇲🇽 MX | Solenoid Switch Valve Repair KitWith Tools | View on Amazon |
This table covers the Solenoid Switch Valve plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes.
4 Solenoid Switch Valve Plug parts for the 2020 Ram 4000 come from TRANSGO.
This group includes TRANSGO RFESV420NT, TRANSGO RFESV453NT and TRANSGO RFESV420WT and the remaining parts above.
Torque Converter Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.4L V8 | 13875 | 🇲🇽 MX | M8 X 1.25 X 18.00 | View on Amazon |
This table covers the Torque Converter bolts.
This group shows a single part: DORMAN 13875.
Transmission Fluid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PENTOSIN Fits: 6.4L V8 | 1058112 | 🇲🇽 MX | ATF441 Liter | View on Amazon |
| PENTOSIN Fits: 6.4L V8 | 1058212 | 🇲🇽 MX | ATF445 Liters | View on Amazon |
| VAICO Fits: 6.4L V8 | V600208US | 🇲🇽 MX | Special 5 L | View on Amazon |
This table covers the automatic-transmission fluids specified for this gearbox. Typical signs include harsh or delayed shifts, fluid that smells burnt, or a shudder at light throttle. Use exactly the specification in the notes. Automatic transmissions are unforgiving of the wrong fluid.
3 Transmission Fluid parts are listed for the 2020 Ram 4000, from PENTOSIN and VAICO.
Part numbers include PENTOSIN 1058112, PENTOSIN 1058212 and VAICO V600208US.
Transmission Fluid Additive
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| LUBEGARD Popular Fits: 6.4L V8 | 19610 | 🇲🇽 MX | Instant Shudder Fixx2 oz | View on Amazon |
| LUBEGARD Fits: 6.4L V8 | 60902 | 🇲🇽 MX | Automatic Transmission Fluid Protectant10 oz | View on Amazon |
| LUBEGARD Fits: 6.4L V8 | 63010 | 🇲🇽 MX | Platinum Universal ATF Protectant10 oz | View on Amazon |
| LUBEGARD Fits: 6.4L V8 | 63016 | 🇲🇽 MX | Platinum Universal ATF Protectant15 oz | View on Amazon |
| LUBEGARD Fits: 6.4L V8 | 63032 | 🇲🇽 MX | Platinum Universal ATF Protectant32 oz | View on Amazon |
This table covers the conditioners and additives used with this transmission fluid.
LUBEGARD supplies the 5 Transmission Fluid Additive parts for the 2020 Ram 4000. LUBEGARD 19610 carries the "Popular" badge.
This group includes LUBEGARD 19610, LUBEGARD 60902 and LUBEGARD 63010 and the remaining parts above.
Valve Body Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRANSTEC Fits: 6.4L V8 | 49434421 | 🇲🇽 MX | Crew45RFE, 5-45RFE, 65RFE | View on Amazon |
This table covers the gaskets that seal the Valve Body. 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: TRANSTEC 49434421.
Buying Automatic Transmission Parts for a 2020 Ram 4000
On this vehicle, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.
- Match the engine first. Every automatic transmission 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 filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Transmission Fluid Additive and Solenoid Switch Valve Plug .
Frequently Asked Questions
How many automatic transmission parts fit the 2020 Ram 4000?
Our catalog currently lists 23 automatic transmission parts for the 2020 Ram 4000 across 10 subcategories and 9 brands, covering both the 5.7L V8 and the 6.4L V8. Each part is matched to the engine(s) it fits.
Do automatic transmission parts differ between 2020 Ram 4000 engines?
Yes. Every automatic transmission 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 automatic transmission problems on a 2020 Ram 4000?
Common symptoms include delayed or harsh engagement, slipping under load, fluid that smells burnt, or shuddering at light throttle around 40 mph. 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 filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
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 2020 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 2020 Ram 4000?
First match the engine — each row shows which engine(s) the part fits. Then use exactly the fluid specification in the notes — automatic transmissions are the least forgiving component on the vehicle about fluid choice. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2020 Ram 4000
Automatic Transmission 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.