Caterpillar TO-4 transmission oil after the April 2025 retirement: what changed
As of 1 April 2025, Caterpillar removed its TO-4 / TO-4M transmission and drive train oil specification from publication and says third-party oils claiming it are used at the machine owner's risk.[1]
TotalEnergies' data sheets say Dynatrans ACX 10W, 30, 50 and 60 meet TO-4. That is TotalEnergies' claim, not a Caterpillar approval, so check your machine's manual or your Cat dealer for each compartment.[2][3][5][6]
Published · Updated · How did we check this? · Pack sizes and prices
Approval status at a glance
Four status levels: OEM-approved (OEM list); TotalEnergies-reported suitable; Meets stated performance (TotalEnergies claim); Confirm in your equipment manual. Where the TotalEnergies product list and data sheet disagree, we show the data sheet’s wording.
DYNATRANS ACX 10W SAE 10 · Caterpillar TO-4
Meets stated performance (TotalEnergies claim)Confirm in your equipment manual
Wording: “CATERPILLAR TO-4” (note: TotalEnergies data sheet; Caterpillar withdrew TO-4 on 1 April 2025)
Source: TotalEnergies data sheet, last updated Jun 2026; TotalEnergies product list supplied to Bulk Lubricants Australia, Oct 2026
DYNATRANS ACX 30 SAE 30 · Caterpillar TO-4
Meets stated performance (TotalEnergies claim)Confirm in your equipment manual
Wording: “CATERPILLAR TO-4” (note: TotalEnergies data sheet; Caterpillar withdrew TO-4 on 1 April 2025)
Source: TotalEnergies data sheet, last updated Nov 2025; TotalEnergies product list supplied to Bulk Lubricants Australia, Oct 2026
DYNATRANS ACX 50 SAE 50 · Caterpillar TO-4
Meets stated performance (TotalEnergies claim)Confirm in your equipment manual
Wording: “CATERPILLAR TO-4” (note: TotalEnergies data sheet; Caterpillar withdrew TO-4 on 1 April 2025)
Source: TotalEnergies data sheet, last updated Aug 2023; TotalEnergies product list supplied to Bulk Lubricants Australia, Oct 2026
DYNATRANS ACX 60 SAE 60 · Caterpillar TO-4
Meets stated performance (TotalEnergies claim)Confirm in your equipment manual
Wording: “CATERPILLAR TO-4” (note: TotalEnergies data sheet; Caterpillar withdrew TO-4 on 1 April 2025)
Source: TotalEnergies data sheet, last updated Jan 2023; TotalEnergies product list supplied to Bulk Lubricants Australia, Oct 2026
Confirm in your equipment manual: Caterpillar removed TO-4 from publication on 1 Apr 2025 and does not endorse third-party TO-4 claims.
What did Caterpillar change about TO-4 in 2025?
Caterpillar removed TO-4 / TO-4M, the FD-1 final drive oil specification and BF-2 from publication on 1 April 2025, and will no longer monitor or support them. Its fluid requirements now live in internal Caterpillar '1E' specifications.[1]
Caterpillar says it made the change because it does not test third-party oils and does not want to imply it endorses them. Cat-branded lubricant labels may still show TO-4 during 2025, until packaging is updated.[1]
| Before 1 April 2025 | From 1 April 2025 | |
|---|---|---|
| TO-4 / TO-4M specification | Published by Caterpillar | Removed from publication |
| Third-party oils claiming TO-4 | Claimed against a published Caterpillar spec | Not endorsed or supported by Caterpillar; used at the owner's risk |
| Where Caterpillar's requirements sit | The published TO-4 spec | Internal Caterpillar '1E' specifications |
| Where Caterpillar tells owners to check | - | The Operation and Maintenance Manual (OMM), your Cat dealer, SEBU6250 and SEBU6251 |
What does the retirement mean for machines already running a TO-4 oil?
Caterpillar's notice does not say that oils made to TO-4 stopped working, or that machines need a different oil. What changed is who stands behind the claim: Caterpillar no longer verifies third-party TO-4 claims, so on a non-Cat oil the claim is the oil maker's own.(our interpretation)
For choosing a lubricant, Caterpillar points to your OMM, your Cat dealer, SEBU6250, SEBU6251 and the Cat fluid selector.[1]
If a machine is under a Caterpillar warranty or service agreement, ask your dealer which oils it accepts before you switch.(our interpretation)
Which Dynatrans ACX grade goes in which compartment?
TotalEnergies matches the grades to compartments: SAE 10W mainly in hydraulic systems, SAE 30 mainly in powershift transmissions and SAE 50 mainly in axles and final drives. SAE 60 is for axles and final gears where the ambient temperature stays above 40°C, with peaks above 50°C.[2][3]
Whatever the data sheet says, the SAE grade has to match the one your manual lists for that compartment and temperature range.(our interpretation)
| Grade | TotalEnergies' typical use | Caterpillar wording on the data sheet |
|---|---|---|
| Dynatrans ACX 10W | Hydraulic systems | Meets TO-4; meets HYDO Advanced 10 |
| Dynatrans ACX 30 | Powershift transmissions | Meets TO-4; meets HYDO Advanced 30 |
| Dynatrans ACX 50 | Axles and final drives | Meets TO-4 |
| Dynatrans ACX 60 | Axles and final gears, ambient permanently above 40°C | Meets TO-4 |
How do I check what my machine needs now?
Start with the OMM for each compartment (transmission, final drives, hydraulics). It names the oil type and SAE grade. Then confirm with your Cat dealer or SEBU6250 if you're unsure.[1][4]
- Keep the data sheet for the oil you chose with your maintenance records, so the wording you relied on is on file.(our interpretation)
- For engine oil in the same machines, Caterpillar still publishes its ECF specifications: see our Caterpillar ECF-3 engine oil guide.(our interpretation)
Supply
Pack sizes and prices from Bulk Lubricants Australia
All four Dynatrans ACX grades come in drums from the TotalEnergies Perth warehouse. Pick the grade by compartment and temperature from your manual, and treat TO-4 as TotalEnergies' 'meets' claim.(our interpretation) Dynatrans ACX 10W, Dynatrans ACX 30, Dynatrans ACX 50 and Dynatrans ACX 60 come in drums. Each is quoted per order, for collection from Maddington (Perth) or freight Australia-wide. Status details are in the panel above.
DYNATRANS ACX 10W SAE 10
- Caterpillar TO-4: Meets stated performance (TotalEnergies claim)
Pack sizes: Drum
Request a price for DYNATRANS ACX 10W SAE 10DYNATRANS ACX 30 SAE 30
- Caterpillar TO-4: Meets stated performance (TotalEnergies claim)
Pack sizes: Drum
Request a price for DYNATRANS ACX 30 SAE 30DYNATRANS ACX 50 SAE 50
- Caterpillar TO-4: Meets stated performance (TotalEnergies claim)
Pack sizes: Drum
Request a price for DYNATRANS ACX 50 SAE 50DYNATRANS ACX 60 SAE 60
- Caterpillar TO-4: Meets stated performance (TotalEnergies claim)
Pack sizes: Drum
Request a price for DYNATRANS ACX 60 SAE 60How did we check this?
On 24 Oct 2026 we read Caterpillar's announcement 'Caterpillar TO-4 Specification to be De-Commissioned', on Caterpillar's own document host. We then compared the Dynatrans ACX data sheets with the TotalEnergies product list supplied to us. cat.com blocks automated reads, so we used the copy on Caterpillar's asset server (caterpillar.scene7.com).
Found an error or a newer list? Email quotes@bulklubricants.com.au with the source and we’ll review this page.
Where does this information come from?
- Caterpillar: Announcement, Caterpillar TO-4 Specification to be De-Commissioned (implementation 1 Apr 2025; © 2025 Caterpillar; read 24 Oct 2026, PDF)
- TotalEnergies data sheet: Dynatrans ACX 10W, 30, 50, last updated Nov 2025 (PDF)
- TotalEnergies data sheet: Dynatrans ACX 60, last updated Jan 2023 (PDF)
- Caterpillar: Machine Fluids Recommendations, SEBU6250 (preview, PDF)
- TotalEnergies data sheet: Dynatrans ACX 10W, 30, 50 (ACX 10W sheet), last updated Jun 2026 (PDF)
- TotalEnergies data sheet: Dynatrans ACX 10W, 30, 50 (ACX 50 sheet), last updated Aug 2023 (PDF)
- TotalEnergies product list supplied to Bulk Lubricants Australia, Oct 2026 (not public)