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Picking the right GMC Acadia flywheel matters because it sits at the core of how your vehicle transfers engine torque to the transmission. A correctly matched, well-balanced flywheel reduces vibration, protects the clutch assembly, and helps the engine idle and respond more smoothly. This guide highlights seven shortlisted flywheels selected for fitment and build quality. We evaluated durability, balance, and compatibility to identify options likely to meet common repair and upgrade needs. Read on to see which features matter most and why these picks made the list.
Looking for other parts? See all GMC Acadia parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | GM Genuine Parts 55587031 Engine Flywheel |  |
| Most Popular A crowd favorite that many people choose with confidence | A-Premium Replacement Solid Flywheel for GMC Sierra/Silverado V8 (168T, 6-Bolt) |  |
| Best Quality Built to a higher standard if you want something more solid | GM Genuine Parts 12571611 14-Inch LS Flywheel |  |
| Best Budget The cheapest option that still gets the job done reliably | atp automotive Z-350 Automatic Transmission Flexplate |  |
| Most Sold A high-volume bestseller chosen again and again | GM 55599020 Flywheel |  |
| Best Value for Money The sweet spot between price and what you get | Artudatech 168-Tooth Flywheel for GM 4.8/5.3/6.0L LS Swap |  |
| Best Overall The best all-around choice for most situations | Marine Engines 4 Less 14" Flywheel Assembly for GM Marine 1-Piece Rear Main Seal SBC V8 |  |
1. GM Genuine Parts 55587031 Engine Flywheel
| Fit Type | Vehicle Specific Fit |
|---|---|
| Manufacturer | ACDelco |
| OEM Part Number | 55587031 |
| Country of Origin | China |
This GM Genuine Parts flywheel is a factory-quality replacement intended for direct fit on compatible GM vehicles, offering the same fit, form, and function validated by General Motors. It is typically used when replacing a worn or damaged flywheel during clutch or transmission service. The unit is machined to OEM-like tolerances and supplied under the GM/ACDelco parts program, which helps ensure reliable engagement and consistent balance for smooth drivability after installation. Because it is manufactured to GM specifications, it simplifies repair decisions for technicians and DIYers who want a component matched to factory requirements. Limitations are minimal for buyers seeking a direct factory-style replacement, but this part is not a performance upgrade and will not change flywheel mass or behavior compared with upgraded aftermarket lightweight or heavy-duty options. Buyers should also ensure correct vehicle-specific fitment and professional installation when replacing drivetrain components.
Best for: Reliability-focused buyers who prioritize factory-spec replacement parts and want a straightforward, proven component for clutch or transmission repairs on a GMC Acadia.
Less Ideal for: Drivers who want performance modifications such as reduced inertia or upgraded clutch behavior should consider purpose-built aftermarket flywheels instead.
- Factory-validated design for fit and function on GM vehicles
- Machined finish consistent with factory replacement standards
- Backed by the GM/ACDelco parts program for traceability and part matching
- Not intended as a performance or lightweight flywheel alternative
Verdict Choose this GM Genuine flywheel when you want a factory-quality, vehicle-specific replacement for reliable, factory-like drivability on a GMC Acadia.
2. A-Premium Replacement Solid Flywheel for GMC Sierra/Silverado V8 (168T, 6-Bolt)
| Material | Gray Iron |
|---|---|
| Bolt Holes | 6 |
| Number of Teeth | 168 |
| Type | Solid Flywheel |
This A-Premium solid flywheel is a direct-style replacement intended for older GM V8 manual transmissions and provides the basic function of transferring crankshaft rotation to the clutch assembly. It is typically used when replacing a worn or damaged flywheel during clutch jobs on compatible GM trucks. Made from gray iron with 6 bolt holes and 168 teeth, it matches factory tooth count and bolt pattern to allow straightforward installation with standard clutch components. The solid design offers simple, reliable operation and aims to reduce vibration and noise compared with a severely worn unit. Practical benefits include OEM-compatible indexing and a one-year unlimited-mile guarantee for peace of mind. Limitations are its solid construction rather than a dual-mass design, so it will not provide the additional vibration isolation of a DMF and may transmit more engine vibration into the driveline. Buyers should also confirm exact model-year and transmission fit before ordering to avoid fitment issues.
Best for: Convenience-driven buyers who want a straightforward, factory-compatible replacement when performing a clutch job themselves or having a shop fit it, prioritizing ease of fit and minimal parts sourcing hassle.
Less Ideal for: Drivers seeking the smoothest possible vibration isolation or owners considering upgrades for high-performance or heavily modified engines should look at alternative vibration-damping solutions.
- Factory-compatible tooth count and 6-bolt pattern for straightforward clutch reassembly
- Solid gray iron construction for durability under normal driving and towing conditions
- Designed to match factory fitment which simplifies installation during a clutch replacement
- One-year unlimited-mileage guarantee provides added confidence after installation
- Solid flywheel design lacks the additional vibration damping of a dual-mass flywheel
- Intended only for manual-transmission applications so not suitable for automatic-equipped vehicles
Verdict A practical, factory-compatible solid flywheel replacement that simplifies clutch repairs but will not match the vibration isolation of a dual-mass design.
3. GM Genuine Parts 12571611 14-Inch LS Flywheel
| Brand | GM Genuine Parts |
|---|---|
| Item model number | 12571611 |
| Exterior | Machined |
| Product type | 14-Inch flywheel |
This GM Genuine Parts 14-inch LS flywheel is a direct-fit, factory-quality replacement intended for GM LS-series applications found in the GMC Acadia lineup that accept this unit. It performs the core job of transferring crankshaft rotation to the transmission bellhousing and clutch assembly while maintaining balance and surface integrity for smooth clutch engagement. The machined exterior and GM validation mean it matches factory fit and bolt patterns, so installation is straightforward for a shop or experienced DIYer during a clutch service. Using a genuine GM part reduces uncertainty about fitment, runout, and longevity compared with generic aftermarket alternatives. The flywheel is a solid, single-piece design, but buyers should confirm ring gear and starter compatibility and expect a professional resurface or inspection if reusing existing clutch components. It is a replacement part rather than a performance-oriented lightweight or dual-mass option, so drivers seeking weight savings or aggressive track behavior should look at specialty performance units instead.
Best for: Performance-oriented GMC Acadia owners who prioritize factory-spec reliability and exact fit during a clutch replacement or drivetrain repair.
Less Ideal for: Drivers seeking a reduced-mass or race-focused flywheel for aggressive track use should consider aftermarket performance units instead.
- Factory-quality part validated by GM for fit and function
- Machined finish for consistent clutch engagement and balanced rotation
- Direct-replacement design simplifies installation during clutch service
- Not designed as a lightweight or performance flywheel for aggressive driving
- No information provided on included ring gear or hardware
- Heavier single-piece construction may not suit track-focused builds
Verdict Choose this GM Genuine Parts flywheel if you want a factory-quality, direct-fit replacement for the GMC Acadia rather than a specialized lightweight performance unit.
4. atp automotive Z-350 Automatic Transmission Flexplate
| Material | Alloy Steel |
|---|---|
| Fit Type | Universal Fit |
| Vehicle Service Type | Passenger Car |
| Manufacturer Part Number | Z-350 |
The atp automotive Z-350 flexplate is a straightforward replacement part intended to reconnect the engine crank to the torque converter in automatic-transmission GMC Acadia vehicles. It is precision balanced to factory specifications and machined with the correct bolt hole spacing and ring gear teeth to match factory fit and function. Typical use is direct replacement during a transmission or torque converter service when the original flexplate shows cracks, tooth damage, or failure. The unit’s high-grade alloy steel construction and automated welding of the ring gear help deliver consistent strength and durability for daily driving. As a budget option it provides the core mechanical features you need without extra frills. Limitations are that it is a universal-fit style part so buyers must verify bolt pattern and tooth count for their specific Acadia year and engine; installation requires proper torque sequence and balance handling to avoid vibration issues. The product comes from a brand with transmission experience and is best when installed by a competent technician.
Best for: Budget-conscious buyers looking for a no-frills, cost-effective replacement flexplate for routine transmission repairs on a GMC Acadia who prioritize value over premium brand extras.
Less Ideal for: Those who want a vehicle-specific OEM-branded part or who expect performance upgrades and higher-end materials should consider higher-tier alternatives.
- Balanced to factory specifications to minimize vibration when installed correctly
- High-grade alloy steel construction for durability under normal driving
- Machined bolt hole spacing and ring gear teeth to match factory patterns
- Automated welding process for consistent ring gear bonding
- Universal-fit designation means buyers must confirm exact fitment for their Acadia model year and engine
- Requires correct installation torque sequence and balancing to avoid driveline vibration
Verdict A practical, low-cost flexplate that restores factory-style fit and balance for GMC Acadia repairs if you confirm fitment and install it properly.
5. GM 55599020 Flywheel
| Manufacturer Part Number | 55599020 |
|---|---|
| Compatible Engines | 1.4L, 1.8L |
| Compatible Models | Cruze, Cruze Limited, Sonic |
This GM 55599020 flywheel is a direct replacement-style unit designed for 1.4L and 1.8L applications in small GM cars such as the Cruze and Sonic. It provides the rotating mass and starter ring gear needed to transfer engine torque to the transmission and to engage the starter. Typical use is as a like-for-like service part when repairing clutches, replacing a worn ring gear, or restoring vibration characteristics after a failed flywheel. Being a factory-brand part, it matches original fit and bolt pattern expectations and simplifies installation for mechanics familiar with GM drivetrains. The limited vehicle list and focus on specific small-engine models means it may not be appropriate for larger GM vehicles like the GMC Acadia without confirming fitment. Buyers should also plan for clutch resurfacing or replacement when installing this flywheel, and verify crankshaft and transmission compatibility before purchase.
Best for: Risk-averse mainstream buyers looking for a factory-brand replacement to restore reliable drivetrain function during routine clutch or starter repairs.
Less Ideal for: Owners seeking parts specifically for the GMC Acadia or those wanting a heavy-duty or performance flywheel should look for a part explicitly listed for their vehicle or a specialty supplier.
- Factory-brand part that matches original bolt pattern and starter ring gear placement
- Intended for direct replacement during clutch or starter repairs to simplify installation
- Provides correct rotating mass for restoring factory drivetrain engagement and balance
- Fitment is limited to specific small GM models with 1.4L and 1.8L engines and may not fit the GMC Acadia
- No information on resurfacing or pre-machining so clutch replacement or machining may be required
- Only one seller rating and minimal listing details available
Verdict A factory replacement flywheel for small GM 1.4L and 1.8L models that suits risk-averse buyers wanting OEM-fit repairs but is not appropriate for the GMC Acadia without confirmed compatibility.
6. Artudatech 168-Tooth Flywheel for GM 4.8/5.3/6.0L LS Swap
| Manufacturer | Artudatech |
|---|---|
| Manufacturer Part Number | C269-A004-A~WH002AMZUS |
| Compatible Engines | GM 4.8L, 5.3L, 6.0L LS-series |
This Artudatech 168-tooth flywheel is a straightforward, factory-quality style replacement intended for GM 4.8, 5.3 and 6.0L LS engines commonly used in GMC Acadia LS-swap or clutch-service applications. Built from high-grade steel with precision machining, it provides the mass and tooth count required for standard starter engagement and consistent crank rotational inertia. Installation is typical for a flywheel replacement during clutch or transmission service and the unit is advertised as easy to install and remove, though professional installation is recommended to ensure proper torque, alignment, and ring gear fitment. Its practical benefit is offering OEM-spec performance and durability at a value-oriented price point for owners doing driveline repairs or engine swaps. Limitations are that detailed installation instructions are not included and the listing does not specify balance condition beyond general precision engineering, so buyers needing a particular balance (factory balanced vs. externally balanced setups) should verify compatibility with their Acadia drivetrain and starter before ordering.
Best for: Practical optimizers looking to maintain or repair a GMC Acadia with an LS-series engine who prioritize a durable, factory-style replacement at a reasonable cost.
Less Ideal for: Drivers seeking a performance or lightweight competition flywheel, or those who need a specifically balanced aftermarket unit tailored to high-power builds should consider other options.
- 168-tooth configuration matches standard starter engagement for compatible GM LS engines
- Constructed from high-grade steel for strength and durability under normal driving loads
- Precision machined to factory-style specifications for straightforward fitment during clutch or transmission work
- No detailed installation instructions included, so professional installation is recommended
- Listing does not explicitly state balance type which may require verification for certain drivetrain setups
Verdict A practical, steel 168-tooth flywheel that offers factory-style durability and value for GMC Acadia owners doing clutch or LS-swap work, provided compatibility and balance needs are confirmed.
7. Marine Engines 4 Less 14" Flywheel Assembly for GM Marine 1-Piece Rear Main Seal SBC V8
| Manufacturer Part Number | FW-14IO |
|---|---|
| OEM Part Number | 222-8M0047213, 222-9520, 3853958 |
| Supported Engines | GM SBC V8 5.0L, 5.7L, 6.2L (marine) |
| Application Years | 1987–newer |
This 14-inch flywheel assembly is sold as a complete replacement for GM marine small-block V8s with a one-piece rear main seal, intended for inboard/outboard applications where the ring gear sits closest to the engine block. It is typically used to replace a worn or damaged flywheel during engine rebuilds or when swapping a marine transmission. The listing notes compatibility with Mercruiser and Volvo Penta part numbers commonly used on GM-based marine engines from 1987 onward, which simplifies sourcing the correct unit. Buyers will appreciate receiving a ready-to-install assembly rather than a bare flywheel, and multiple customer reports mention good fit and fast delivery. Limitations are that this is an aftermarket unit rather than a factory part and the product information focuses on fitment to marine SBC V8 engines, so buyers should confirm bolt pattern and starter engagement depth against their specific setup before installation. There is limited published technical detail beyond the part references, so professional fitment verification is recommended for precise applications.
Best for: Balanced buyers looking for a practical, ready-to-install replacement flywheel for marine GM small-block projects who prioritize fitment convenience and value over strictly factory-original parts.
Less Ideal for: Owners who require guaranteed factory-original components or need documented, detailed specifications for custom machining or performance tuning should consider specialist or OEM sources instead.
- Supplies a complete flywheel assembly ready for installation, saving time over sourcing separate components
- Matches common Mercruiser and Volvo Penta replacement part numbers for straightforward cross-referencing
- Designed for GM small-block marine V8s with the ring gear oriented toward the block, ensuring correct starter engagement in compatible setups
- Multiple customer reports indicate reliable fit and fast fulfillment
- Aftermarket part rather than a factory-quality OEM unit, which may differ in finish or tolerances
- Product details do not list precise bolt pattern or tooth count, requiring buyers to verify fitment prior to purchase
Verdict A convenient aftermarket 14" complete flywheel assembly that fits GM marine small-blocks and simplifies replacement, but confirm exact fitment details before buying.
Choosing the Right GMC Acadia Flywheel: Key Factors to Consider
Fitment and Compatibility
Correct fitment is the first priority because the flywheel must match the Acadia's engine bolt pattern, crank flange, and starter engagement. Using a unit with exact mounting dimensions prevents misalignment that can cause premature wear or starter issues.
Compatibility also covers the correct balance spec for the engine and whether the flywheel is designed for vehicles with manual transmissions or for setups that require a flexplate. Verify the stated engine applications and bolt torque specifications to avoid installation surprises.
Balance and Runout
Balance and runout influence NVH and clutch life. An out-of-balance flywheel transmits vibration into the driveline, which can lead to noise, accelerated bearing wear, and clutch chatter. Look for flywheels that meet tight balance tolerances and include runout specifications.
Manufacturers that test and document dynamic balance reduce the risk of post-install vibration. If resurfacing is planned, minimized runout helps ensure that machining removes material evenly without introducing new imbalance.
Material and Heat Treatment
Flywheels are typically made from forged steel, cast iron, or billet materials, each with tradeoffs in strength, thermal conductivity, and wear characteristics. Heat treatment and surface hardness affect resistance to cracking and hot spots under heavy use or clutch slippage.
Choose a material and finish that align with the intended driving style and duty cycle. Heavier, robust constructions may offer durability for towing and repeated clutch engagement, while lighter options can improve throttle response but may be less tolerant of heat.
Surface Finish and Resurfacing Needs
The mating surface condition directly affects clutch engagement. A properly finished surface reduces glazing and promotes even wear across the friction disc. Some flywheels arrive pre-machined while others may require clutch flywheel resurfacing before installation.
If resurfacing is necessary, confirm allowable material removal limits to avoid weakening the flywheel. A good finish specification and clear resurfacing guidance can simplify installation and improve clutch life.
Starter Gear and Ring Gear Condition
The starter engagement interface must be precise to avoid starter tooth damage and engagement noise. Inspect whether the flywheel includes a new ring gear or whether the original must be transferred. The fit and condition of the ring gear influence starter performance and noise diagnosis related to engagement.
A securely attached ring gear and correct tooth profile reduce the risk of starter skipping and help prevent long-term damage to both the flywheel and starter assembly.
Installation and Serviceability
Installation considerations include bolt pattern orientation, recommended torque sequence and values, and whether special tools are needed. Accessibility of service instructions and clear mounting notes reduce the chance of installation errors that can affect balance and clutch performance.
Also evaluate how the flywheel affects future serviceability, for example whether it allows for straightforward resurfacing or replacement of wear items without extensive disassembly. Units designed for easier service save labor and reduce the chance of installation-related issues.
FAQ
What are common flywheel symptoms I should watch for on a GMC Acadia?
Common symptoms often include increased vibration at idle or under load, unusual noise during engagement, clutch chatter, or difficulty with smooth shifting. These signs usually point to imbalance, surface wear, or mounting issues, and they often appear gradually.
Can I resurface a worn flywheel instead of replacing it?
Resurfacing is often possible when the wear is limited and the machining will not exceed the manufacturer's allowable material removal. Resurfacing restores a flat, smooth surface, but it is not suitable if there are deep cracks, excessive heat damage, or if material limits would be exceeded.
How does flywheel balance affect drive quality?
Balance directly influences vibration and NVH. A properly balanced flywheel minimizes torsional vibration and reduces stress on bearings and the clutch assembly. Poor balance can cause noticeable vibration, increased wear, and an unpleasant driving feel.
What is involved in replacing a flywheel on a GMC Acadia?
Replacement typically requires removing the transmission or separating it from the engine to access the flywheel. Accurate alignment, correct torque sequencing for mounting bolts, and checking starter engagement are important. Many installations also include inspecting or replacing the clutch and pilot bearing while the transmission is out.
How can I tell if noise is from the flywheel or the starter?
Noise during engine cranking that is intermittent or occurs only during engagement often points to starter tooth contact, while noise that persists after startup and varies with engine speed may indicate flywheel surface or balance issues. A careful inspection of the ring gear and listening tests under controlled conditions can help diagnose the source.
Is a dual mass flywheel necessary for the GMC Acadia?
Whether a dual mass flywheel is appropriate depends on the vehicle's original configuration and the desired NVH characteristics. Dual mass designs reduce torsional vibration but are heavier and may have different service considerations. Match the flywheel type to the vehicle's specified setup and performance needs.
How We Chose the Best GMC Acadia Flywheel
We focused on characteristics that affect drivability, longevity, and fit for the GMC Acadia. Key evaluation criteria included fitment accuracy to the vehicle and engine variants, balance and runout specifications that influence vibration, material and heat-treatment quality that determine wear resistance, and ring gear and mounting interface design for reliable engagement. We also considered the extent of machining or resurfacing required at installation and the availability of clear installation guidance. Durability indicators such as fatigue-resistant construction and compatible torque capacity were part of the selection filters. Products were excluded if they lacked explicit fitment data for GMC Acadia models, had unclear manufacturing tolerances, or omitted critical mounting specifications. We did not include items with unverified balance or that required undocumented modifications. The resulting list emphasizes flywheels that minimize vibration, offer consistent clutch mating surfaces, and provide straightforward installation paths.
Our full evaluation process is outlined in our review methodology.
Conclusion
Choosing the right GMC Acadia flywheel comes down to fitment accuracy, balance, and compatible construction that meets your driving demands. Prioritize units with documented balance tolerances, correct mounting specs, and a surface finish suitable for the clutch type you will use. Keep in mind the tradeoffs between durability and weight, and plan for installation and any resurfacing needs before you begin. Focusing on these criteria will help restore smooth drivetrain performance and reduce the risk of repeat service.
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