Changan Transmission Control Modules (TCM / TCU)
CQ Yuejin supplies transmission control modules for selected Changan and Oshan vehicle applications. These components are also commonly called a Transmission Control Unit (TCU), Transmission ECU, Gearbox ECU or Gearbox Control Unit. Because hardware numbers, suffixes and software calibrations can vary within the same vehicle model, compatibility must be verified before shipment.
VIN verification | Full-number matching | International supply from China
Available Changan TCM and TCU Reference Families
Choose the vehicle model and reference-number prefix below. Each prefix identifies a reference family and is not a complete orderable part number.
Why the Complete Module Number Matters
A reference such as DF727A33 identifies a product family only. Characters after the prefix may identify a specific hardware version, software calibration or vehicle configuration. Two modules with the same prefix should not be assumed interchangeable. Please send the VIN and a clear photo of the complete label on the original module. We will confirm the matching reference before quotation and shipment.
Information Required for Compatibility Checking
- •VIN or chassis number
- •Vehicle model and model year
- •Complete number from the original TCM/TCU label
- •Clear photos of the label, connectors and housing
- •Transmission code or identification label, if available
- •Quantity and destination country
Frequently Asked Questions
What is the difference between TCM and TCU?
TCM means Transmission Control Module and TCU means Transmission Control Unit. In many parts and repair markets, both terms describe the electronic controller that manages transmission operation. Transmission ECU and Gearbox ECU are also commonly used. The exact construction depends on the transmission design.
Is the reference prefix enough to place an order?
No. The prefix helps identify the reference family, but the complete number after the prefix may vary. We require the VIN and the complete original-module number to confirm compatibility.
Can I order by vehicle model only?
Vehicle model alone is not sufficient because different transmission versions and calibrations may be used in the same model. Please provide the VIN and original-module label.
Does the module require programming or calibration?
Programming, coding, adaptation or calibration requirements depend on the vehicle and module version. The buyer should confirm the installation procedure with a qualified transmission or diagnostic technician before ordering.
Is a TCM the same as a transmission valve body?
Not necessarily. A TCM is an electronic controller. A valve body is a hydraulic component, while some transmissions combine electronics and hydraulics in a mechatronic assembly. Product construction must be confirmed from the part number and photos.
How can I request a quotation?
Send the VIN, complete label number, clear product photos, required quantity and destination country by WhatsApp or email. We will check compatibility and availability before quoting.
Also Sourcing Complete Transmission Assemblies?
Browse our catalog of Changan complete automatic transmission and gearbox assemblies, including DF727, DF733, 4AT and 8AT applications.
View Complete Transmissions →Check Compatibility and Request a Quote
Please upload the original module label and enter the VIN. The reference prefix alone is not sufficient for final compatibility confirmation.