24237508 vs 24268086: which GM 6T30 transmission filter do you need?
24237508 is the Gen1 6T30/MH9 filter reference in our verified fitment table; 24268086 is the Gen2 6T30/MH9 reference. Use VIN and production-generation data to distinguish them. Do not treat them as interchangeable.
Why is this worth an article?
Because both part numbers can appear under the same broad transmission family:
GM 6T30 / MH9
That makes it tempting to treat them as alternative numbers for the same filter.
Our verified fitment table does not support that.
It separates them by transmission generation:
| OE | Function | Transmission | Generation / application boundary |
|---|---|---|---|
| 24237508 | Automatic transmission filter | 6T30 / MH9 | Gen1 |
| 24268086 | Automatic transmission filter | 6T30 / MH9 Gen2 | Gen2 / later 6T30 |
The practical rule is simple:
Same transmission family does not mean same filter generation.
The number has to be matched to the actual transmission build.
What is the difference between 24237508 and 24268086?
According to our verified GM 6T fitment reference:
24237508 is catalogued as the Gen1 6T30 / MH9 transmission filter.
24268086 is catalogued as the Gen2 6T30 / MH9 transmission filter.
The distinction is therefore not:
cheap filter vs expensive filter
or:
old OE number vs automatically superseding new OE number
The distinction supported by our data is:
Gen1 filter reference vs Gen2 filter reference.
That is the boundary we publish.
We do not infer additional physical differences that our evidence does not document.
24237508: what does our fitment table support?
Our reference table records:
OE: 24237508
Function: automatic transmission filter, Gen1
Transmission: 6T30 / MH9
Year field: 2009-up, with production-generation verification required
The vehicle/application field includes:
- Chevrolet Cobalt / Ravon R4
- Gentra
- Onix
- Sonic
- Spin
But there is an important limitation attached to that list:
these applications are version-specific.
The table specifically warns that Sonic and Spin must be checked by version, and that the year range should not be treated as a substitute for identifying the actual transmission generation.
It also contains an explicit exclusion:
Do not transfer this fitment to older Lacetti automatic-transmission applications; the transmission is different.
That is exactly why a vehicle name is not enough for a transmission-filter order.
24268086: what does our fitment table support?
Our reference table records:
OE: 24268086
Function: automatic transmission filter, Gen2
Transmission: 6T30 / MH9 Gen2
Year/application field: 2013-up filter generation
The application field identifies:
Ravon / Chevrolet Nexia R3 and later 6T30 applications
But the most important field is not the vehicle name.
It is the restriction:
Use VIN / production date to distinguish 24268086 from 24237508. The two must not be mixed.
That is the purchasing rule.
A seller can put “6T30” in both titles and still fail to tell you which filter generation is required.
Why can’t I simply use the model year?
Because a catalogue year and a production-generation boundary are not automatically the same thing.
Our 24237508 record itself says:
2009-up — production generation must be checked.
The 24268086 record says:
2013-up filter generation.
Those two statements overlap if read as simple calendar-year ranges.
That overlap is precisely why the table tells the buyer to verify:
VIN / production date
rather than apply a rule such as:
“Anything before 2013 uses 24237508 and anything from 2013 onward uses 24268086.”
Our data does not authorize that shortcut.
A transition can depend on the actual transmission build, not just the number printed in the vehicle's model-year field.
Does 24268086 supersede 24237508?
Our current verified table does not establish a GM supersession relationship between these two numbers.
That distinction matters.
A generation change and a supersession are not the same claim.
If an official catalogue says:
OLD PN → superseded by → NEW PN
that is a specific service-parts relationship.
Our current evidence supports:
24237508 = Gen1 reference
24268086 = Gen2 reference
It does not support writing:
24268086 universally replaces 24237508.
Therefore, we do not use the newer-looking number as an automatic replacement.
Can the vehicle name tell me which filter to order?
Not safely.
Take Chevrolet Sonic as an example of why vehicle names are dangerous catalogue keys.
GM documentation in our technical evidence library confirms that the Sonic line itself can use different transmissions depending on engine:
- 2012 Sonic 1.8L LUW automatic → 6T30 / MH9
- 2012–2020 Sonic 1.4L LUJ/LUV automatic → 6T40 within the applicable GM service bulletin
So even before choosing between two 6T30 filter generations, the buyer has to confirm that the vehicle actually has a 6T30 / MH9.
The correct sequence is:
vehicle → engine/RPO → installed transmission → transmission generation → filter OE
not:
vehicle name → filter OE
Why does this matter in a workshop?
A transmission filter is inexpensive compared with the labour surrounding transmission work.
If the wrong generation is supplied, the problem is not just that the buyer received the wrong box.
The workshop may already have:
- scheduled the vehicle;
- drained fluid;
- opened or removed transmission components;
- committed technician time;
- occupied a bay;
- waited for parts.
A low-value part with incorrect fitment data can therefore create a much larger service delay.
That is why we do not combine these two OE numbers into one product simply because both are described as 6T30 filters.
How to verify 24237508 vs 24268086 before ordering
1. Confirm the installed transmission first
You need to establish:
6T30 / MH9
Do not start with the vehicle name alone.
2. Confirm the transmission generation
The distinction in our reference data is:
24237508 → Gen1
24268086 → Gen2
If the generation is not known, do not choose the filter yet.
3. Check VIN and production date
This is specifically required by the restriction attached to 24268086 in our verified table.
Production timing is especially important around generation transitions.
4. Check engine and version where required
For applications such as Sonic and Spin, the table explicitly requires version confirmation.
5. Do not infer supersession
Do not assume 24268086 replaces 24237508 simply because it is associated with the later generation.
A replacement chain has to be independently verified.
6. Put the generation on the quote or order
A useful purchase record should not say only:
24237508
or:
24268086
It should say what is being verified, for example:
24237508 — 6T30/MH9 — Gen1 filter
or:
24268086 — 6T30/MH9 — Gen2 filter
That makes the fitment assumption visible before the part ships.
What we do not claim here
This comparison has strict evidence limits.
We do not claim that 24268086 universally supersedes 24237508.
Our current verified data establishes different filter generations, not a universal GM supersession chain.
We do not publish physical dimensions, filter-media material, mesh specification or internal construction differences between the two filters because those fields have not been verified to the standard required for publication.
We do not claim that every vehicle produced before a specific calendar date uses 24237508 and every later vehicle uses 24268086.
The verified table explicitly requires VIN / production-generation checking.
We do not use the vehicle model name alone as fitment proof.
Sonic and Spin are version-dependent in our reference data, and the Sonic line itself has documented transmission variation by engine.
We do not transfer 24237508 fitment to older Lacetti automatic-transmission applications.
Our fitment reference specifically excludes that assumption because the transmission is different.
We also note an evidence limitation: professional transmission catalogues support the identity and application of these two filter references, but our current research did not capture a public GM target-part page that independently documents both exact filter numbers. For this article, the controlling source is our audited gm_6t_fitment.csv reference.
Frequently asked
- Is 24237508 a Gen1 or Gen2 6T30 filter?
- Our verified fitment table identifies 24237508 as the Gen1 6T30 / MH9 filter reference.
- Is 24268086 a Gen1 or Gen2 6T30 filter?
- Our verified fitment table identifies 24268086 as the Gen2 6T30 / MH9 filter reference.
- Are 24237508 and 24268086 interchangeable?
- Our reference explicitly says they must be distinguished by VIN / production date and must not be mixed. We therefore do not treat them as interchangeable.
- Does 24268086 replace 24237508?
- A universal GM supersession relationship has not been established in our current evidence. Gen2 does not automatically mean “supersedes Gen1.”
- Can I choose between them by vehicle year only?
- No. The reference specifically requires production-generation verification. Use VIN / production date where the transition is uncertain.
- Does Chevrolet Sonic always use a 6T30 filter?
No. Transmission fitment depends on the powertrain. Confirm the installed transmission code before selecting a filter.