Buick Encore and Chevrolet Trax 1.4: which GM transmission is fitted?
For parts ordering, that distinction is important. Engine family alone is not a safe substitute for checking the vehicle configuration.
If you are identifying a transmission on an actual vehicle, use the vehicle's own data as the final check. See how to identify a GM 6T transmission before ordering.
What does PIP5353F support for Buick Encore?
Our evidence library records the relevant Buick Encore application from GM PIP5353F:
- model: Buick Encore;
- model years in the bulletin scope: 2014–2021;
- engine: 1.4 LUJ/LUV;
- transmission scope: automatic applications;
- transmission: 6T40;
- RPO set in the cited model table includes MH8 / MHB / MNK.
The word automatic is part of the boundary. The bulletin also lists manual options, so the presence of Encore + 1.4 LUJ/LUV alone is not enough to erase transmission-type differences.
What does the same GM source support for Chevrolet Trax?
The same evidence library records the Chevrolet Trax application from that bulletin:
- model: Chevrolet Trax;
- model years in the bulletin scope: 2013–2021;
- engine: 1.4 LUJ/LUV;
- transmission family stated for those applications: 6T40-family RPOs.
This is evidence for the applications listed in PIP5353F. It does not independently prove that every model year and configuration was sold in every country.
That market distinction matters for an export-parts website. A model appearing in a GM bulletin is not the same claim as documented retail availability in every national market.
Why not write “1.4 LUJ/LUV = 6T40”?
Because that would turn a vehicle-specific source into an engine-code shortcut.
The safe statement is:
PIP5353F lists these stated Encore and Trax applications with 6T40-family automatic transmissions.
The unsafe statement would be:
“Any GM vehicle with LUJ or LUV must have a 6T40.”
The source does not authorize that generalization.
This is also why OEProof keeps separate vehicle-intent pages instead of creating an engine-code decoder.
How is this different from the Chevrolet Cruze 1.4 answer?
The same GM bulletin also contains a Cruze 1.4 LUJ/LUV automatic application, but that query already has its own owner page.
For Cruze, see Chevrolet Cruze 1.4 automatic transmission identification.
This article owns a different search question: Encore / Trax 1.4.
Keeping those intents separate prevents a specific Cruze answer from drifting into an unsupported “all 1.4” rule.
What do MH8, MHB and MNK tell us here?
They are RPO references present in the source context used for the Encore application.
They are useful when cross-checking a specific vehicle against the relevant GM documentation, but they should not be detached from that context and turned into a universal decoder.
The correct workflow is document + vehicle, not code memorization alone.
Does this prove an Encore or Trax in every country had this automatic?
No.
PIP5353F supports the vehicle/application relationship within the bulletin's scope. It is not, by itself, a country-by-country sales registry.
So this page does not claim that every Encore or Trax model year listed above was necessarily sold in Russia, Kazakhstan, Uzbekistan or any other specific market in the same configuration.
When regional fitment matters, verify the actual vehicle.
Can I choose a specific 6T40 seal or filter from this answer?
Not yet.
Identifying the transmission family is only one layer. Exact parts may still depend on:
- transmission generation;
- production date;
- exact component function;
- part-number revision;
- left/right position for side-specific seals.
Do not jump directly from “this application uses 6T40” to “this exact part fits.”
Practical ordering workflow
For a Buick Encore or Chevrolet Trax 1.4 automatic:
1. Confirm the model year. 2. Confirm the 1.4 LUJ/LUV engine where applicable to the cited source. 3. Confirm that the vehicle is an automatic, not a manual variant. 4. Cross-check the vehicle's transmission/RPO information. 5. Verify the exact OE number and part function separately before ordering.
This keeps the source-backed vehicle identification separate from exact-part fitment.
What this article does not prove
It does not prove:
- that all LUJ/LUV vehicles use 6T40;
- that every Encore/Trax year was sold in every country;
- that MH8/MHB/MNK have one universal meaning across all GM documentation;
- that every 6T40 part fits every 6T40 vehicle;
- any exact seal, gasket or filter fitment.
FAQ
- What transmission does a 2014–2021 Buick Encore 1.4 automatic use in PIP5353F?
- The stated 1.4 LUJ/LUV automatic applications are listed with the 6T40; the source context includes RPO references MH8/MHB/MNK.
- What transmission does a 2013–2021 Chevrolet Trax 1.4 use in this GM bulletin?
- PIP5353F lists the stated Trax 1.4 LUJ/LUV applications with 6T40-family RPOs.
- Does every 1.4 LUJ/LUV GM vehicle use a 6T40?
- No. This article does not create an engine-code-wide rule. It reports specific vehicle applications from PIP5353F.
- Does the bulletin prove these cars were sold in every country for every listed year?
- No. The bulletin supports the application relationship, not country-by-country retail availability.
- Does MH8, MHB or MNK automatically identify any GM vehicle as a 6T40?
- Do not use these codes as a context-free decoder. Cross-check them against the relevant GM document and the specific vehicle.
- Can I order a specific 6T40 filter just from the model name?
- No. Confirm transmission generation and the exact part/OE reference separately.