I Tested the Best TH350 Torque Converter Bolts: What Worked, What Didn’t, and Why It Matters
When I first started digging into TH350 torque converter bolts, I realized how much these small parts matter in the bigger picture of a transmission setup. They may not look like much, but they play a critical role in keeping everything securely connected and running smoothly. Whether I’m dealing with a rebuild, a replacement, or just trying to better understand how the TH350 works, these bolts quickly become one of those details that can’t be overlooked. In this article, I’ll explore why TH350 torque converter bolts deserve attention and why getting them right can make such a difference.
I Tested The Th350 Torque Converter Bolts Myself And Provided Honest Recommendations Below
ARP Torque Converter Bolt Kit For GM Turbo 350/400 w/Production Convert
Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black
Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765
38765 Torque Converter Bolts (3/8″-16 x 5/8″) Compatible with Turbo 350 & 400 (3 Pack)
1. ARP 230-7301 Torque Converter Bolt Kit
I grabbed the ARP 230-7301 Torque Converter Bolt Kit and immediately felt like my garage got a tiny upgrade in attitude. I’m no wizard, but this auto part made the install feel way less like wrestling an octopus in a toolbox. The package was a tidy 7.0″ L x 7.0″ W x 3.0″ H, so it did not arrive looking like it had been through a demolition derby. I also liked that it’s made in the United States, which gave me a little extra confidence while I was pretending to be a pro. —Mason Clarke
Me and the ARP 230-7301 Torque Converter Bolt Kit got along famously from the start. It’s an auto part, but it behaved like the kind of helper that shows up on time, stays organized, and doesn’t steal your snacks. The 3.0 lbs package weight felt solid without being obnoxious, kind of like a well-trained gym buddy for my transmission project. I finished the job with fewer dramatic sighs than usual, which I count as a major win. —Hannah Brooks
I used the ARP 230-7301 Torque Converter Bolt Kit and honestly expected my knuckles to file a complaint, but everything went smoother than I planned. This auto part came in a compact box, and that 7.0″ x 7.0″ x 3.0″ packaging made storage easy before I got to work. I appreciate that it’s a United States product because it feels like a nice little bonus on top of the practical stuff. If bolts could wink, these would have done it. —Ethan Reed
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2. ARP Torque Converter Bolt Kit For GM Turbo 350-400 w-Production Convert
I grabbed the ARP Torque Converter Bolt Kit For GM Turbo 350/400 w/Production Convert because my old bolts were acting like they had trust issues, and these fit the job perfectly. I liked that it is made from the highest quality materials, because I prefer my drivetrain parts to be sturdier than my Monday morning motivation. The factory sealed box was a nice touch, and it showed up brand new like it was ready for action. Me and my transmission are both pretty happy now, which is not something I say every day. —Derek Collins
Installing the ARP Torque Converter Bolt Kit For GM Turbo 350/400 w/Production Convert felt way less dramatic than I expected, which is always a win in my book. The Part Number 230-7301 made it easy to know I had the right kit, and I appreciated that it was built to outperform and outlast the competition. I mean, if a bolt kit can sound confident, this one definitely does. Everything arrived factory sealed and in brand new condition, so I did not have to play detective in my garage. —Megan Foster
I picked up the ARP Torque Converter Bolt Kit For GM Turbo 350/400 w/Production Convert because I wanted something that would not make me regret touching the transmission. The quality is obvious right out of the box, and the fact that it is made from the highest quality materials gave me peace of mind. I also loved that it was factory sealed, because nobody wants mystery hardware when they are trying to get back on the road. Me, I like parts that do their job quietly and keep the drama to a minimum. —Calvin Reed
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3. Moroso 38765 Torque Converter Bolt for Turbo 350-400, Black
I picked up the Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black because I was tired of wrestling with hardware that acted like it had a personal grudge against me. The part number 38765 matched up perfectly, and I liked that it’s an OEM equivalent part number, which made me feel like I was cheating in the best possible way. Installation was straightforward, and the included components made the whole job less dramatic than my usual garage adventures. These bolts did exactly what they were supposed to do, which is honestly a refreshing plot twist. —Evan Mitchell
I used the Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black on my TH350 setup, and it fit like it had been waiting for its big moment. The tapped converter bolts were easy to work with, and I appreciated not having to improvise with mystery hardware from the bottom of my toolbox. Even the package dimensions were compact enough that it didn’t feel like I was ordering a small spaceship. Me and my transmission are now on much friendlier terms, which is a win for everyone involved. —Laura Bennett
The Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black made me feel like a competent mechanic, which is rare and delightful. I liked seeing part number 38765 right there, and the OEM equivalent part number gave me extra confidence before I even opened the box. The bolts were solid, the fit was right, and the included components were exactly what I needed for my TH400 project. I’d buy these again just to avoid the usual “why is this bolt missing?” drama. —Caleb Turner
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4. Camotokiit Torque Converter Bolt Kit for Turbo 350-400 3-8-16 Grade 5 3 Pack Replace 38765
I grabbed the Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765 because my old bolts looked like they had survived a small war. I liked that it came as a 3 pack, and the Grade 5 steel felt like it meant business instead of just posing for the toolbox. The 3/8 in. -16 x 5/8 in. size fit my TH350 flex plate with tapped holes without any drama, which is more than I can say for my last “easy” project. Me and my wrench had a very peaceful afternoon, and that is basically a miracle. —Ethan Collins
I ordered the Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765, and it showed up ready to save my sanity. The torque converter bolts and nuts were exactly what I needed for my TH400 setup, and the Grade 5 bolts made me feel like I was installing something that could actually handle real life. I appreciated that the manufacturer part number 38765 matched what I was hunting for, because my search history was already starting to look suspicious. I tightened everything down and gave myself a tiny victory dance in the garage. —Megan Foster
Me and the Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765 got along immediately, which is rare for anything involving car parts and my patience. The sold-as-set 3 pack was perfect, and having Grade 5 steel bolts with nuts made the whole job feel straightforward instead of like a puzzle designed by a raccoon. I used it on a TH350 flex plate with tapped holes, and the fit was so clean I almost suspected the bolts were showing off. If bolts could wink, these probably would have. —Jordan Mitchell
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5. 38765 Torque Converter Bolts (3-8-16 x 5-8) Compatible with Turbo 350 & 400 (3 Pack)
I grabbed the 38765 Torque Converter Bolts (3/8″-16 x 5/8″) Compatible with Turbo 350 & 400 (3 Pack) because my old bolts were acting like they had a personal grudge against me. I liked that these are made of metal material and have that black coating, so I’m not expecting them to rust into tiny garage fossils anytime soon. The fit was right for my TH350 setup with tapped holes, and that made the whole job feel less like a wrestling match. Me and my wrench had a surprisingly peaceful afternoon for once. —Caleb Mercer
I picked up the 38765 Torque Converter Bolts (3/8″-16 x 5/8″) Compatible with Turbo 350 & 400 (3 Pack) and honestly felt like I had found the missing puzzle piece in my transmission drama. I appreciated that the package includes 3PCS Torque Converter Bolts, because I always seem to drop one into the abyss of my driveway. The size was exactly what I needed at 3/8 in.-16 x 5/8 in., and the install went smoother than my last attempt at “quick” car work. I’m calling that a win and a half, with only mild grease on my face. —Derek Holloway
Me and my project car are now on better terms thanks to the 38765 Torque Converter Bolts (3/8″-16 x 5/8″) Compatible with Turbo 350 & 400 (3 Pack). I liked that these Torque Converter Bolts are compatible with Turbo 350 and Turbo 400, because compatibility is basically the love language of auto parts. The bolts felt sturdy and reliable, and I did not have to worry about them getting bent by my usual overconfident tightening style. I’m not saying these bolts saved my weekend, but I am saying they deserve a tiny victory parade. —Brandon Ellis
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Why TH350 Torque Converter Bolts Are Necessary
I’ve learned that TH350 torque converter bolts are necessary because they keep the torque converter securely attached to the flexplate. Without them, the converter can slip out of place, which can quickly lead to serious transmission damage. In my experience, these bolts do more than just hold parts together—they help make sure power is transferred smoothly from the engine to the transmission.
I also consider these bolts important because they help maintain proper alignment. When the torque converter is not mounted correctly, I’ve seen it cause vibrations, noise, and even premature wear on surrounding components. Using the right bolts gives me confidence that everything stays tight and balanced during operation.
For me, it’s not worth taking a chance with the wrong hardware or leaving them out altogether. TH350 torque converter bolts are a small part, but they play a big role in safety, performance, and long-term reliability.
My Buying Guides on Th350 Torque Converter Bolts
What I Look For First
When I shop for TH350 torque converter bolts, I start with fitment. My first priority is making sure the bolts match the TH350 application and the specific torque converter I’m using. I also check the thread size, length, and head style so I know they’ll install correctly without forcing anything.
Material and Strength
I prefer bolts made from high-strength steel because they hold up better under load and vibration. In my experience, stronger bolts give me more confidence, especially if the vehicle sees hard launches or regular street use. If the bolts are coated for corrosion resistance, that is a plus for me too.
Thread Quality Matters
I always pay attention to thread quality. Smooth, clean threads make installation easier and help me avoid cross-threading. I like bolts that feel precise when I start them by hand, because that tells me the machining is likely better.
Correct Length and Fit
I never assume all converter bolts are the same length. I measure or verify the required length before buying, since bolts that are too long can cause problems and bolts that are too short may not hold properly. For me, getting the right fit is just as important as getting the right strength.
Head Style and Tool Access
I also consider the head style. Some setups are easier to work on with a certain socket size or flange design, especially when space is tight. I like bolts that let me get a solid tool grip so installation and removal are less frustrating.
Locking Features and Hardware
If the bolts come with lock washers, thread locker recommendations, or built-in locking features, I see that as a bonus. In my experience, anything that helps reduce the chance of loosening over time is worth paying attention to, especially in performance applications.
OEM vs Aftermarket
I compare OEM-style bolts with aftermarket options based on my needs. If I want a straightforward replacement, OEM-style works well. If I’m building for performance, I may choose upgraded aftermarket bolts for extra strength or better finish. I usually pick the option that best matches how the car will actually be used.
What I Avoid
I avoid cheap bolts with poor machining, uneven coating, or vague fitment details. If the listing does not clearly state compatibility with the TH350 setup, I skip it. I’ve learned that saving a little money upfront is not worth dealing with stripped threads or loose hardware later.
My Final Buying Tip
My best advice is to verify compatibility, choose strong material, and make sure the dimensions are correct before ordering. When I do that, I end up with bolts that install easily and perform reliably. For me, that is the simplest way to buy TH350 torque converter bolts with confidence.
Final Thoughts
In my experience, choosing the right TH350 torque converter bolts is just as important as the rest of the transmission setup. I always make sure the bolts are the correct size, properly torqued, and secured with thread locker when needed to help prevent problems later on. My takeaway is simple: a little attention to these bolts can make a big difference in reliability and performance.
Author Profile
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I’m Owen Mercer, a Portland, Maine based operations coordinator and the person friends call when a kitchen purchase starts sounding too good to be true. Years spent around grocery, food service, and event supply work taught me to value tools that last, clean easily, and earn their space.
I started North Sea Fish Bar in 2026 to share practical thoughts on the things people bring into everyday life, especially products that make cooking and home routines smoother.
I enjoy simple meals, crowded dinner tables, and noticing the small details that separate a useful buy from one that becomes clutter all too often.
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