6-Speed Automatic Transmission Assembly for 2014 Buick Verano
Product Notes Read before buying
This is a 6-speed automatic transmission for vehicles with the 2.4L engine and Front-Wheel Drive (FWD) only. Fitment is specific to vehicles with the transmission option code MH8.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | Sedan | 2014 | L4 2.4L FLEX | FWD | Automatic |
| Convenience | Sedan | 2014 | L4 2.4L FLEX | FWD | Automatic |
| Leather | Sedan | 2014 | L4 2.4L FLEX | FWD | Automatic |
| Premium | Sedan | 2014 | L4 2.0L Turbo | FWD | Automatic & Manual |
| Premium | Sedan | 2014 | L4 2.4L | FWD | Automatic |
| Tela | Sedan | 2014 | L4 2.4L FLEX | FWD | Automatic |
Know This Transmission Before You Buy
The research behind our purchase interview — recalls, bulletins and real install economics for this transmission family:
A quick look at your own vehicle makes sure the right transmission shows up:
- Confirm RPO code MH8 on the Service Parts Identification sticker (glove box or trunk).
- Confirm the 8th digit of the VIN is K (for the 2.4L LEA Ecotec engine).
- Confirm the vehicle is Front-Wheel Drive (FWD).
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support fixture
- Transmission jack
- Subframe alignment pins
- Torque wrench
- Bi-directional scan tool capable of GM programming
Budget for these consumables at install:
- DEXRON-VI full synthetic ATF
- Torque converter seal (front pump seal)
- Axle seals (driver and passenger side)
- Transmission cooler-line flush solvent/machine
What your vehicle’s computers will need after the swap:
What’s involved: VIN-specific dealer programming and TCM adaptive relearn (Service Fast Learn)
The integrated TEHCM contains the TCM and must be programmed to the vehicle's VIN using GM SPS2 and a J2534 pass-thru tool, followed by a Service Fast Learn adaptive relearn procedure. Disagreement on family name resolved by choosing the more cautious explanation in details.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque Converter Seating: Ensure the converter is fully seated (three distinct clicks/drops) before tightening bellhousing bolts to avoid cracking the front pump gear.
- TEHCM Generation Match: Verify the replacement TEHCM matches the generation of the vehicle (Gen 2 has no pressure switches and a letter as the 8th digit of the barcode).
- Fluid Level Check Procedure: No dipstick is present. Level must be checked via the fluid level control plug with the engine idling, vehicle level, and fluid temperature at 85C to 95C (185F to 203F).
- Service Fast Learn Conditions: Transmission fluid temperature must be between 70C and 100C, vehicle stationary, brakes applied, and throttle at 0% to complete the relearn.
Easy to get right once you know them:
- Forcing the bellhousing bolts when the torque converter is not fully seated, crushing the internal oil pump gear.
- Skipping the mandatory transmission cooler and line flush, which recirculates debris from the failed unit and destroys the replacement.
- Using generic or incorrect automatic transmission fluid instead of licensed DEXRON-VI.
- Checking the fluid level while the engine is off or cold, leading to severe underfilling.
- Assuming the transmission is plug-and-play without performing the required VIN programming and Service Fast Learn.
Not issues with the units on this page — the manufacturer documented these for every transmission of this family, wherever you buy one. Handy for your installer:
🔎 Recommended at install: Dealers will inspect and replace the affected transmission shift cable adjuster.
🔎 Recommended at install: Dealers will inspect and, if necessary, replace the key cylinder lock housing.
🔎 Recommended at install: Perform a transmission line pressure check and inspect the TEHCM.
🔎 Recommended at install: Outlines updates including removal of fluid pressure switches and updated TCM calibration software.
🔎 Recommended at install: Improperly manufactured snap ring can compress and pop out, forcing transmission into limp mode.
🔎 Recommended at install: Check fluid condition or replace torque converter.
🔎 Recommended at install: Replace broken 3-5-Reverse clutch wave plate.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-05040-2286400). Unit-specific details — mileage, condition, warranty, freight — are covered in the checkout interview.
Policies, in plain English.
Shipping & Handling
- Ships by LTL freight on a pallet — a real freight truck, not a parcel van
- Your checkout freight quote covers delivery to your door (liftgate service included for residential addresses)
- The carrier calls ahead to schedule a delivery window — someone must be present to receive it
- Typically palletized and picked up within 2–3 business days; transit time depends on distance
120-Day Warranty
This part includes a 120-day warranty.
- If the part fails within the warranty window, we'll replace it or refund per the coverage terms
- Coverage is parts-only — installation labor is not included
- Warranty covers defects — not installation errors, misuse, or damage after installation
Your pre-purchase interview reviews these exact terms with you before anything is charged.
Returns (30 Days)
We accept returns of uninstalled parts within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: This part ships by freight (LTL) — the part price is refundable per the terms above, but shipping costs are non-refundable and return freight follows the seller's return terms. Your pre-purchase interview walks through the exact numbers before you buy
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
Freight damage is rare — and you're fully protected when you do two things at delivery:
- Inspect before you sign — you're allowed time to look the pallet over while the driver waits
- Write any damage on the delivery receipt before signing — that one line is what makes a freight claim succeed
- Severe damage? Refuse the delivery — it goes back at no cost to you and we make it right
- Photograph the pallet before unwrapping; report concealed damage within 24 hours of delivery
We handle the carrier claim — you just help document it. Your pre-purchase interview walks through this checklist too.
Order Cancellation
Cancel before shipment for a full refund. Once the pallet has been built, a preparation charge may apply — and once the freight carrier picks it up, shipping costs are non-refundable and standard return terms apply. Your pre-purchase interview shows the exact numbers before you pay.
Expert Guides
2014 Buick Verano 2.4L 6T45 Transmission: Problems, Identification, and Used Replacement
Identify the exact MH8 transmission variant, understand what kills it, and learn when to replace it with a quality used OEM unit.
Read Full Guide →Related Trouble Codes (OBD-II)
4 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
Miscellaneous Information
OEM Part Numbers:
GM: 19332241, 24260630
Other: 28034661, 4AHW
Fits Years: 2014
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This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
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