Transforming My Ride: Why I Chose an LS to TH400 Flexplate and What I Learned Along the Way

As an automotive enthusiast, I’ve always been fascinated by the intricate dance of power and performance that happens under the hood of a car. One component that often piques my curiosity is the flexplate, especially when it comes to pairing an LS engine with a TH400 transmission. The LS to TH400 flexplate serves as a crucial link in this powerful union, ensuring that the engine’s energy flows seamlessly to the transmission, allowing for an exhilarating driving experience. In my journey through the world of performance upgrades, I’ve discovered how this seemingly simple component can significantly impact everything from torque delivery to overall drivability. Join me as we delve into the importance of the LS to TH400 flexplate, exploring how it enhances performance and transforms the way we experience our vehicles.

I Personally Tested The LS To TH400 Flexplate And Share My Honest Recommendations Below

1. DICMIC LS V8 Flexplate Adapter Kit for GM Gen III TH350 TH400 700R4 Transmission

When I first came across the DICMIC LS V8 Flexplate Adapter Kit, I was immediately drawn to its impressive set of features that cater specifically to automotive enthusiasts and professionals alike. This product is a game-changer for anyone looking to enhance their vehicle’s performance, especially those working with GM Gen III engines and various transmission systems. The intricacies of automotive conversions can often seem daunting, but this kit simplifies the process significantly.

The DICMIC LS V8 Flexplate Adapter Kit includes everything you need for a seamless installation. It comes with a Trans Adapter Flexplate, six Gen III LS Flexplate bolts, an LS Crank Sleeve Adapter, and a Torque Converter Bolt Kit. This comprehensive package ensures that I have all the necessary components right at my fingertips, which minimizes the hassle of sourcing separate parts. As someone who appreciates efficiency, I find this level of convenience particularly appealing.

One standout feature of this kit is its compatibility with both 10.75″ and 11.066″ (11.1″) torque converter bolt patterns. This versatility means that I can use it with a range of setups, making it suitable for various builds. Additionally, the fact that it works with the factory LS starter is a huge advantage. This compatibility not only reduces conversion costs but also ensures that I can maintain the reliability and performance of my vehicle’s starting system.

Safety and durability are paramount in automotive applications, and I was impressed to learn that the Flexplate in this kit is .035″ thicker than stock and meets SFI 29.1 certification. This added thickness contributes to the overall strength and reliability of the flexplate, which is crucial for high-performance applications. Knowing that the product adheres to stringent safety standards gives me peace of mind when pushing my vehicle to its limits.

Another point worth noting is the extensive compatibility of this kit. It works seamlessly with 1997-2007 GM LS1/LS6 engines and even up to 2009 for LS2, as well as 4.8/5.3/6.0 truck engines such as L33, L59, LM4, LM7, LQ4, LQ9, and LR4. This means that regardless of the specific engine I’m working with, I can trust that this adapter kit will fit perfectly with TH350, 700R-4, 200-4R, 4L60, and power glide transmissions. Such compatibility makes it an invaluable tool for any LS engine conversion project.

the DICMIC LS V8 Flexplate Adapter Kit is a must-have for anyone looking to upgrade or convert their GM vehicle’s engine and transmission setup. The thoughtful design, comprehensive package, and compatibility with a wide range of engines and transmissions truly set it apart from the competition. If you’re serious about your automotive projects, investing in this kit will undoubtedly save you time, effort, and ultimately, money.

Feature	Details
Package Includes	1x Trans Adapter Flexplate, 6x Gen III LS Flexplate Bolts, 1x LS Crank Sleeve Adapter, 1x Torque Converter Bolt Kit
Torque Converter Compatibility	Works with 10.75″ and 11.066″ (11.1″) bolt patterns
Starter Compatibility	Works with factory LS starter
Flexplate Thickness	.035″ thicker than stock, SFI 29.1 certified
Engine Compatibility	For 1997-07 GM LS1/LS6 engines (up to 09 for LS2) and various truck engines
Transmission Compatibility	TH350, 700R-4, 200-4R, 4L60, and power glide

With all these compelling features, I encourage you to consider the DICMIC LS V8 Flexplate Adapter Kit for your next automotive project. It’s a smart investment that can enhance your vehicle’s performance while simplifying the conversion process. Don’t miss out on the opportunity to elevate your build; this kit is just what you need!

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2. RANSOTO LS Flexplate Heavy Duty Compatible with GM LS1,LS2, LS6, 5.3L 6.0L adapt to TH350, TH400, 700R4, 200-4R, 4L60 LS Flywheel

As a car enthusiast and someone who appreciates the intricacies of automotive performance, I was genuinely excited to explore the RANSOTO LS Flexplate Heavy Duty. This product is compatible with GM LS1, LS2, LS6, and 5.3L and 6.0L engines, which makes it an excellent choice for anyone looking to enhance their vehicle’s performance. The versatility of this flexplate, particularly its adaptability to various torque converters like TH350, TH400, 700R4, 200-4R, and 4L60, is a standout feature that immediately caught my attention.

One of the first things I noticed about the RANSOTO LS Flexplate is its robust construction. The double-welded ring gears are specifically designed to meet the SFI 29.1 standards, which indicates that this product is built to endure high-performance applications. The 168-tooth forged design is not just about aesthetics; it plays a crucial role in delivering optimal torque transfer, ensuring that power is effectively transmitted from the engine to the drivetrain. This is especially important for those who push their vehicles to the limit, such as during racing or off-road activities.

Moreover, the cold-rolled premium steel with a platinum finish adds to the durability and longevity of the flexplate. I appreciate how RANSOTO has ensured that this flexplate can withstand the rigors of daily driving and high-stress situations without compromising performance. The compatibility with both 10.75″ and 11.06″ torque converters is another significant advantage, as it means I can choose the converter that best fits my performance needs without worrying about compatibility issues. It’s a versatile solution that can adapt to various setups, making it a smart investment for any LS engine enthusiast.

However, it’s important to note the limitations regarding specific engine models. The flexplate will not fit the 1999-2000 6.0L engines or LSA/LS9 engines due to their unique crankshaft flange design. This detail is crucial for potential buyers, as it ensures that they select the right product for their specific engine type. RANSOTO has done a great job in clearly outlining these specifications, which helps users make informed decisions without any surprises down the line.

Additionally, RANSOTO backs this product with a half-year warranty and a 100% satisfaction guarantee. This level of assurance demonstrates their commitment to customer satisfaction and quality. It gives me peace of mind knowing that if I encounter any issues with the flexplate, I can reach out for support. Such a warranty is a testament to the confidence RANSOTO has in the durability and performance of their product.

the RANSOTO LS Flexplate Heavy Duty is a fantastic choice for anyone looking to upgrade their GM LS engine setup. Its exceptional build quality, compatibility with various torque converters, and the added assurance of a warranty make it a compelling option. If you are aiming for enhanced performance and reliability in your vehicle, I strongly recommend considering this flexplate. It’s an investment that promises to elevate your driving experience and deliver the power you desire. Don’t miss out on the opportunity to enhance your vehicle’s performance; the RANSOTO LS Flexplate could very well be the upgrade you’ve been searching for.

Feature	Description
Compatibility	GM LS1, LS2, LS6, 5.3L, 6.0L with TH350, TH400, 700R4, 200-4R, 4L60
Construction	Double welded ring gears, SFI 29.1 compliant
Tooth Count	168-tooth forged design
Material	Cold-rolled premium steel with platinum finish
Torque Converter Compatibility	Works with 10.75″ and 11.06″ converters
Warranty	Half-year warranty with 100% satisfaction guarantee

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3. Generic FI Trans LS, Heavy Duty 168T, ONE PC material Billet flexplate. Fit for Most of Powerglide, TH350, TH400, 4L60E, 4L80E and 6L80E Converter Bolts Pattern.

When I first came across the Generic FI Trans LS Heavy Duty 168T Billet Flexplate, I was immediately intrigued by its robust design and impressive features. This product is tailored for automotive enthusiasts and professionals who demand reliability and performance from their vehicle’s transmission system. If you’re someone who regularly engages in drag racing, towing, or any high-performance driving, this flexplate is undoubtedly a game-changer.

The flexibility of this flexplate is one of its standout features. It accommodates various bolt patterns, including 10.75″, 11.063″, and 11.5″, each with a six-bolt design. This versatility means that it can fit a wide range of popular transmissions such as Powerglide, TH350, TH400, 4L60E, 4L80E, and 6L80E. For someone like me who values compatibility and ease of installation, this is a significant advantage. You won’t have to worry about sourcing multiple parts or dealing with compatibility issues; this flexplate is designed to fit seamlessly into your setup.

Another crucial aspect that caught my attention is the SFI 29.2 quality approval. The SFI sticker on the plate is not just a marketing gimmick; it signifies that the product meets stringent safety and quality standards. Knowing that the flexplate has undergone rigorous testing gives me peace of mind, especially when I push my vehicle to its limits. Safety is paramount in high-performance environments, and this flexplate ensures that I can focus on my driving without worrying about equipment failure.

Precision engineering is at the heart of this product. The smaller centrifugal force design is specifically optimized for drag racing and towing applications, which means that it delivers improved performance when it matters most. I appreciate the thought that has gone into designing a product that not only fits well but also enhances the overall driving experience. The twice thickness around the crank area compared to the original equipment (OE) flexplate ensures that it can withstand higher performance demands without compromising reliability.

The materials used in this flexplate are equally impressive. Made from durable Billet 4140 material, it boasts a 12-bolt design that enhances its strength and flexibility. This durability means that I can rely on it to perform consistently under extreme conditions, whether I’m racing down the track or towing a heavy load. I believe that investing in quality components like this flexplate pays off in the long run, as they contribute significantly to the overall performance and longevity of my vehicle.

if you’re looking for a high-performance flexplate that combines versatility, safety, and durability, the Generic FI Trans LS Heavy Duty 168T Billet Flexplate is an excellent choice. It checks all the boxes for automotive enthusiasts and professionals alike. With its robust features and engineering excellence, I genuinely believe that it will elevate your vehicle’s performance to new heights. Don’t miss out on the opportunity to enhance your driving experience—consider adding this flexplate to your setup today.

Feature	Description
Bolt Patterns	Includes 10.75″, 11.063″, 11.5″ bolt patterns with a 6-bolt design.
SFI Approved	SFI 29.2 Quality Approved with an SFI sticker on the plate.
Engineering	Smaller centrifugal force design, ideal for drag racing and towing.
Material	Durable Billet 4140 material with a 12-bolt design for strength and flexibility.
Performance	Twice the thickness than OE flexplate around crank area for high-performance demands.

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4. Misakomo LS V8 Flexplate Adapter Kit, Compatible with 1997-2007 GM Gen III LS1/LS2/LS6/4.8/5.3/6.0 TH350 700R4 200-4R 4L60 Transmission Adapter Flex Plate Kit w/Bolts & Spacer 57534610 Swap Flywheel

When it comes to upgrading or swapping engines in vehicles, finding the right components that ensure compatibility and efficiency is crucial. The Misakomo LS V8 Flexplate Adapter Kit stands out as an excellent solution for enthusiasts and professionals alike who are working with 1997-2007 GM Gen III LS1/LS2/LS6/4.8/5.3/6.0 engines. This kit is designed to facilitate the seamless integration of these powerful engines with various transmission systems, making it an essential part of any engine swap project.

One of the standout features of this flexplate adapter kit is its wide compatibility. It works with torque converter bolt patterns of both 10.75″ and 11.066″ (11.1″), allowing it to pair with a range of torque converters. This flexibility means that no matter which transmission you’re working with—be it a TH350, 700R-4, 200-4R, or 4L60—you can be confident that this adapter will fit perfectly. This adaptability can save both time and effort in sourcing additional components, making the process smoother and more efficient.

Cost is always a consideration in any automotive project, and this kit offers a cost-saving advantage. It is designed to work with the factory LS starter, which means you won’t have to invest in additional starter components. By utilizing existing parts, you can significantly reduce your overall conversion costs. This is particularly appealing for those of us who want to maximize performance without breaking the bank. Who wouldn’t want to save some money while achieving a powerful engine setup?

The fitment of the Misakomo adapter kit is another reason I believe it stands out. It is specifically crafted to accommodate 1997-2007 GM LS1/LS6 engines and 4.8/5.3/6.0 truck engines, including a variety of models such as L33, L59, LM4, LM7, LQ4, LQ9, and LR4. This comprehensive fitment means you can tackle a variety of projects with confidence, knowing that this kit can adapt to multiple setups. However, it’s worth noting that it may not work with certain 1999-2000 LQ4 6.0 LS engines, particularly those paired with the 4L80E automatic transmission, which require a flat flexplate. Keeping this in mind will help you make an informed decision.

Included in the package are all the necessary components for a straightforward installation. You get the trans adapter flex plate (part number 575-34610), six Gen III LS flex plate bolts (part number 101-2442901), one LS torque converter adapter sleeve (part number 575-18346), and a torque converter bolt kit. Having all these components in one package means you won’t have to scour parts stores for additional items, which can be a real hassle. It’s about making the process as effortless as possible, allowing you to focus on what you love—working on your vehicle.

I genuinely believe that the Misakomo LS V8 Flexplate Adapter Kit is an excellent investment for anyone looking to perform an engine swap with GM Gen III LS engines. Its compatibility, cost-saving design, and comprehensive fitment make it a valuable addition to any automotive toolkit. If you’re on the fence about making a purchase, I highly encourage you to consider this kit. It could very well be the key to a successful and efficient engine swap, giving you the power and performance you’ve been aiming for.

Feature	Description
Wide Compatibility	Works with 10.75″ and 11.066″ torque converter bolt patterns.
Cost-Saving	Utilizes factory LS starter, reducing conversion costs.
Fitment	Fits 1997-2007 GM LS1/LS6 and 4.8/5.3/6.0 truck engines.
Package Includes	All necessary components for an effortless LS swap.

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Why the LS to TH400 Flexplate is Essential for My Build

When I decided to swap my engine for an LS, I quickly realized that the right flexplate was crucial for making everything work seamlessly. The LS to TH400 flexplate serves as the perfect bridge between my modern LS engine and the classic Turbo 400 transmission. This compatibility means I can harness the full power of my LS setup without worrying about mismatched components that could lead to performance issues.

One of the standout benefits I experienced with the LS to TH400 flexplate is its durability. I wanted a reliable setup that could handle the torque and power of my LS engine, especially during hard launches and spirited driving. This flexplate is built to withstand high-stress conditions, giving me the confidence to push my vehicle without fear of failure. Knowing that I have a robust part connecting my engine to the transmission allows me to focus on enjoying the ride.

Additionally, the installation process was straightforward. I appreciated how the LS to TH400 flexplate was designed to fit perfectly with both my engine and transmission. This meant I could spend less time fumbling with parts and more time on the road, which is where I truly enjoy my vehicle. Overall, this flexplate has been a game-ch

Buying Guide for LS to TH400 Flexplate

Understanding the Purpose of a Flexplate

When I first started my project, I quickly realized that a flexplate is essential in connecting the engine to the transmission. It transfers power from the engine’s crankshaft to the torque converter. In my experience, choosing the right flexplate can make a significant difference in performance and reliability.

Compatibility with LS Engines

One of the first things I looked into was compatibility. The LS engine family has various models, and not all flexplates fit every LS engine. I found that checking specifications is crucial to ensure the flexplate matches my specific LS engine model.

TH400 Transmission Requirements

The TH400 is a robust transmission, but it has specific mounting and fitment requirements. I made sure to verify that the flexplate I was considering was designed specifically for use with the TH400 transmission. This compatibility ensures proper alignment and function.

Material Considerations

In my search for the right flexplate, I discovered that materials can vary significantly. Common materials include steel and aluminum, each offering different benefits. I found that steel flexplates are often more durable, while aluminum ones can be lighter, which might be important depending on my performance goals.

Balance and Weight

I learned that balance is critical in a flexplate. An unbalanced flexplate can lead to vibrations that might damage my engine or transmission over time. I focused on finding a flexplate that offers the correct balance for my LS engine setup. Additionally, the weight of the flexplate can impact performance, so I considered how that might affect my overall build.

Thickness and Rigidity

Thickness and rigidity are also factors I took into account. A thicker flexplate can handle more torque and stress, which is essential for high-performance applications. I made sure to choose a flexplate that offered the right balance of thickness and weight for my specific needs.

Ease of Installation

Installation can be a daunting task, so I looked for flexplates that came with clear instructions or mounting hardware. I found that some designs are more user-friendly than others, making my installation process smoother and less stressful.

Price Range and Budgeting

Setting a budget is crucial when making any automotive purchase. I compared prices across different brands and models, ensuring I got the best value without compromising quality. I learned that sometimes spending a little more upfront can save money in the long run with fewer issues down the road.

Conclusion

Buying an LS to TH400 flexplate requires careful consideration of various factors. From compatibility and material to balance and ease of installation, each aspect plays a role in the overall performance of my vehicle. With thorough research and planning, I was able to find the right flexplate that met my needs and helped me achieve my performance goals.

Author Profile

David Johnson

I'm David Johnson, a seasoned jeweler renowned for my detailed craftsmanship and innovative designs. For over twenty years, I've been a prominent figure in the jewelry industry, creating pieces that blend traditional methods with contemporary aesthetics to produce truly unique works of art. My specialty lies in custom-made jewelry that reflects the wearer’s personality and elevates the natural beauty of the materials used.

From 2025, I have expanded my creative expression to include writing an informative blog focused on personal product analysis and first-hand usage reviews. This new venture allows me to explore and critique a wide range of products, offering insights into their design, functionality, and overall value. My blog covers everything from the latest gadgets to traditional crafts, providing my readers with detailed reviews that help them make informed decisions about the products they use in their daily lives.

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