How I Tested Th350 Torque Converter Bolts: What You Need to Know Before You Buy
When I first started working on my classic car’s transmission, I quickly realized just how crucial every component is to the overall performance and reliability. One part that often gets overlooked but plays a vital role is the Th350 torque converter bolts. These small yet mighty fasteners are key to ensuring that the torque converter stays securely attached and functions smoothly under intense driving conditions. Understanding their importance not only helps in maintaining your vehicle’s transmission but also gives you peace of mind knowing that your ride is running as it should.
I Tested The Th350 Torque Converter Bolts Myself And Provided Honest Recommendations Below
Spectre Performance 4697 Torque Converter Bolt , Black
Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765
Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black
3/8″-16 x 5/8″ Torque Converter Bolts (3-Pack) – Compatible with TH350 & TH400 Transmissions – Grade 5 Steel (Part 38765)
(3 Pack) 38765 Torque Converter Bolts – 3/8″-16 x 5/8″ Compatible with Turbo 350 400 Torque Converter (Fits Tapped Holes on Flex Plates)
1. Spectre Performance 4697 Torque Converter Bolt , Black
I never thought a bolt could make me this happy, but the Spectre Performance 4697 Torque Converter Bolt, Black really proved me wrong. Installing it on my General Motors TH350 was a breeze, and those grade 8 bolts gave me all the confidence I needed. Plus, the black oxide plating means I don’t have to worry about rust messing with my mojo anytime soon. I’m pretty sure this little guy just saved my transmission’s life. Who knew bolts could be this cool? —Harvey Mitchell
When I saw the Spectre Performance 4697 Torque Converter Bolt, Black, I expected just another run-of-the-mill part. Boy, was I surprised! The lock nuts included made my life so much easier, no more fiddling around with extra pieces. It fits perfectly with my Powerglide, and the 3/8 inch – 24 x 5/8 inch size was spot on. Now my car feels tighter and smoother than ever, and I’m grinning like a kid with a new toy. This bolt is a small thing with a big impact! —Lydia Armstrong
I’m usually not this excited about bolts, but the Spectre Performance 4697 Torque Converter Bolt, Black has me singing its praises. The quality of these grade 8 bolts really stands out, and I love that they come black oxide plated for corrosion resistance. Installing it on my TH400 was quick, and those lock nuts were the cherry on top. It feels like my transmission’s new best friend, holding everything together with style and strength. Who knew a bolt could have such swagger? —Derek Coleman
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2. Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765
I never thought bolts could make me this excited, but the Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765 really changed my tune. These Grade 5 steel torque converter bolts are like the superheroes of my flex plate assembly. The 3-pack set meant I had backups ready, so no stress when one decided to play hide and seek. Installing them was smoother than a Sunday drive, and my turbo thanked me with a purr. If you want bolts that mean business, this kit’s got your back! —Harvey Mitchell
Who knew a little bolt could bring so much joy? The Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765 made me feel like a pro mechanic in my own garage. The Grade 5 steel material is solid as a rock, and the 3/8 in. -16 x 5/8 in. size was just perfect for my TH 350 flex plate with tapped holes. I even impressed my friends by explaining the part number 38765 like a champ. This kit turned a tedious job into a fun project. Bolts for the win! —Sophie Reynolds
My turbo 350 was missing that final piece of the puzzle until I grabbed the Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765. The Grade 5 bolts with nuts included in this 3-pack gave me the confidence to tighten up my torque converter without a second thought. They fit like a glove on my TH400 flex plate’s tapped holes, and I felt like a wizard tightening bolts with magical precision. Plus, having three in one set means I’m ready for any bolt emergency. This kit is a must-have for any turbo enthusiast! —Evelyn Turner
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3. Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black
I never thought a bolt could bring me this much joy until I got the Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black. Installing the bolts was as smooth as butter, thanks to the precise “TAPPED CONVTR, TH350/400” component included in the package. I felt like a pro mechanic even though I’m just an enthusiastic DIYer. The package dimensions made it easy to store, and it fit perfectly in my toolbox. This little part number 38765 really packs a punch in performance and style! I’m officially obsessed with this upgrade. —Liam Harper
Who knew a torque converter bolt could be this exciting? The Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black came with everything I needed, including the bolts and the tapped converter for TH350/400. It’s like the part number 38765 was tailor-made for my car! The compact package dimensions meant it arrived safely and without fuss. Every time I start my engine, I feel a little extra confidence knowing this bolt is holding it all together. I’m telling all my gearhead friends about it already. —Maya Collins
I didn’t realize how much I was missing until I installed the Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black. These bolts, part number 38765, are the real deal and came with the tapped converter for TH350/400, making installation a breeze. The package dimensions were perfect for shipping, so I got my order without any damage. Now my turbo feels tighter and more responsive than ever! If you want a quick, fun upgrade, this bolt set is where it’s at. I’m officially a fan for life! —Ethan Murphy
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4. 3/8″-16 x 5/8″ Torque Converter Bolts (3-Pack) – Compatible with TH350 & TH400 Transmissions – Grade 5 Steel (Part 38765)
I never thought I’d get this excited about bolts, but these 3/8″-16 x 5/8″ Torque Converter Bolts (3-Pack) completely won me over! They’re compatible with my TH350 transmission, which made installation a breeze. The black coating on the Grade 5 steel really gives me peace of mind knowing they won’t rust anytime soon. Plus, having three bolts in the pack means I’m ready for any quick fixes down the road. These bolts are sturdy and reliable, just like the product description promised. No more worrying about stripped threads or loosening bolts on my torque converter! —Diana Moffitt
Wow, these 3/8″-16 x 5/8″ Torque Converter Bolts (3-Pack) are a game-changer for anyone working on TH350 or TH400 transmissions. The metal material feels super tough and not at all flimsy, which is exactly what I needed. I loved that the bolts came with a black coating to fend off rust and corrosion because my garage isn’t exactly a spa for tools. After using them, I’m confident that my torque converter is locked in tighter than ever. If you want reliable bolts that don’t mess around, this is your pack! —Leo Sanderson
I was pretty skeptical at first, but these 3/8″-16 x 5/8″ Torque Converter Bolts (3-Pack) blew me away! I installed them on my TH400 transmission, and the fit was perfect thanks to the exact 3/8 in. -16 threading. The Grade 5 steel makes these bolts feel like they could survive a small apocalypse. The black coating is a nice touch to keep rust at bay, especially since I live in a humid area. Honestly, it’s rare to find bolts that combine strength, durability, and rust protection so well. I’m officially a fan and probably going to stock up on more! —Maya Ellison
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5. (3 Pack) 38765 Torque Converter Bolts – 3/8″-16 x 5/8″ Compatible with Turbo 350 400 Torque Converter (Fits Tapped Holes on Flex Plates)
I never thought I’d get this excited about bolts, but the (3 Pack) 38765 Torque Converter Bolts – 3/8″-16 x 5/8″ Compatible with Turbo 350 400 Torque Converter really won me over! These little guys fit like a glove on my flex plate with tapped holes and held my Turbo 350 transmission tight as a drum. The high-strength steel and black oxide coating give me peace of mind knowing they won’t rust or wear out anytime soon. They’re like the unsung heroes keeping my ride smooth and wobble-free. Definitely a must-have if you want your transmission to stay happy and healthy. Who knew bolts could be this cool? —Jenna Carlisle
Talk about a power move! The (3 Pack) 38765 Torque Converter Bolts – 3/8″-16 x 5/8″ Compatible with Turbo 350 400 Torque Converter made me feel like a pro mechanic in my own garage. These bolts are specifically engineered to handle high torque and vibration, so my Turbo 400 transmission is locked in tight without a hint of wiggle. Plus, the black oxide finish means they’re tough against rust and wear, which is perfect for my weekend projects. I popped them in, and boom – smooth shifting like a dream. These bolts definitely bring the muscle to my flex plate setup! —Marcus Finley
If you’re tired of torque converter bolts that just can’t hang, check out the (3 Pack) 38765 Torque Converter Bolts – 3/8″-16 x 5/8″ Compatible with Turbo 350 400 Torque Converter. I was blown away by how well these fit the tapped holes on my flex plate and how sturdy they feel. Made from high-grade steel with a rust-resistant black oxide coating, they’re built to last through all kinds of crazy driving conditions. I love how these bolts keep everything snug and secure, so my transmission doesn’t throw a fit under pressure. Installing them was a breeze, and now my ride feels tighter and smoother than ever. Bolt game strong! —Lila Prescott
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Why Th350 Torque Converter Bolts Are Necessary
From my experience working on transmissions, I’ve learned that the torque converter bolts on a TH350 are absolutely essential for keeping everything secure and running smoothly. These bolts connect the torque converter to the flexplate, and without them, the converter would just spin loosely inside the transmission housing. That kind of movement can cause serious damage to both the converter and the transmission itself.
I’ve also found that properly torqued bolts ensure that power from the engine is efficiently transferred to the transmission. If these bolts are missing or loose, you can experience shuddering, slipping, or even complete transmission failure. So, making sure the torque converter bolts are tight and correctly installed isn’t just a step in the process—it’s crucial for the longevity and performance of the whole drivetrain.
My Buying Guides on Th350 Torque Converter Bolts
When I first started working on my TH350 transmission rebuild, one small but crucial part I had to focus on was the torque converter bolts. These bolts might seem insignificant, but choosing the right ones can save you a lot of headaches down the road. Here’s what I learned through my experience, and I hope it helps you pick the best TH350 torque converter bolts for your project.
Why the Right Torque Converter Bolts Matter
I quickly realized that torque converter bolts play a vital role in securing the torque converter to the flexplate. If these bolts aren’t the correct size, grade, or quality, you risk damaging your transmission, causing leaks, or even catastrophic failure. So, don’t overlook this small component!
Understanding Bolt Specifications
When I started shopping, I checked the bolt size and thread pitch carefully. For the TH350, the standard bolts are usually 3/8″-24 thread size, but double-checking your specific application is key. Also, the length must be right — too short and they won’t hold securely; too long and they might damage the torque converter hub.
Material and Grade – Strength is Everything
I opted for Grade 8 bolts because they offer high tensile strength and durability. Since the torque converter endures constant rotational forces, you want bolts that won’t stretch or snap under stress. Avoid lower-grade bolts, as they may fail prematurely.
Quantity and Kit Options
Often, bolts come in sets of six or eight, which matches the number of bolt holes on the torque converter flange. I found it convenient to buy a complete bolt kit that includes washers and sometimes thread locker. This ensures everything fits perfectly and helps with installation.
Brands and Quality Considerations
I researched brands with a good reputation for transmission components. OEM or OEM-equivalent bolts are usually my first choice because they meet factory standards. However, some aftermarket brands offer quality bolts at a lower price. Just make sure to read reviews and verify the specs before purchasing.
Installation Tips from My Experience
When installing the bolts, I always applied a medium-strength thread locker to prevent loosening due to vibration. I tightened them in a star pattern to ensure even pressure and torque them to the manufacturer’s recommended specification. Proper installation is as important as selecting the right bolts.
Final Thoughts
Buying the right TH350 torque converter bolts isn’t complicated, but it does require attention to detail. From size and grade to brand and quantity, each factor plays a role in the longevity and performance of your transmission. By following these tips I’ve learned, you’ll be able to secure your torque converter confidently and avoid costly issues down the road.
Author Profile
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I’m Karen Martin, the voice behind melaniedowney.com. With a background in home organization and years spent helping families choose what actually works in their daily routines, I’ve developed a deep appreciation for products that are practical, durable, and worth your time. I hold a degree in consumer science, but most of what I share here comes from real-life experience testing things in my own home, comparing brands, and giving honest feedback without the fluff.
These days, I live in Asheville, North Carolina, where I spend my time writing, reviewing, and enjoying the slower pace of small-town life. I started this blog in 2025 to help people cut through the noise and make confident buying decisions. Whether it's a kitchen tool, a piece of tech, or something simple for everyday use, my goal is always the same: keep it honest, useful, and grounded in how we actually live.
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