NHTSA service bulletin

NHTSA Service Bulletin 11023605: 2025 Ram 4500

Official manufacturer communication context for 2025 Ram 4500, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.

NHTSA service bulletin 11023605 summary graphic for 2025 Ram 4500
11023605NHTSA document ID
Manufacturer communicationcommunication type
2affected product rows
2source rows grouped

Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.

Quick answer

Flash: Transmission Control Module (TCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): P0827-00 Up and Down Shift Switch Circuit Low. P0826-00 Up and Down Shift Switch Circuit. P085F-00 Up and Down Shift Switch Circuit Range/Performance. Customers may also experience one or more of the following: Vehicle stuck in default gear, and possibly stranded for many minutes. Rough/bumpy 2-3 power on upshifts and/or 3-2 coast down shifts. Vehicle enters into limp home mode. Other software improvements: Decreased sensitivity to faults P1D8A and P1D8B. This bulletin involves reprogramming the TCM with the latest available software.

What this bulletin may mean before buying

Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.

Affected products listed in this communication

MakeModelModel yearsBuyer note
Ram45002025Ask for service records and run the exact VIN before purchase.
Ram55002025Ask for service records and run the exact VIN before purchase.

Buyer checklist

  1. Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
  2. Check recall campaign pages for safety actions that may require dealer repair.
  3. Compare this bulletin with common problem pages for the same model and component area.
  4. Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
  5. Use the used-car buying checklist and get an independent inspection.

Frequently asked questions

What is NHTSA service bulletin 11023605?

Flash: Transmission Control Module (TCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): P0827-00 Up and Down Shift Switch Circuit Low. P0826-00 Up and Down Shift Switch Circuit. P085F-00 Up and Down Shift Switch Circuit Range/Performance. Customers may also experience one or more of the.

Is a service bulletin the same as a recall?

No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.

How should a used-car buyer use this bulletin?

Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.

Check the exact VIN before you buy

Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.

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