I Tested TH350 Torque Converter Bolts: The Best Fit, Torque Specs, and Installation Tips
When I first started digging into TH350 Torque Converter Bolts, I realized just how much these small pieces can matter in a transmission setup. They may not look like the most exciting part of the build, but they play a crucial role in keeping everything properly connected and running smoothly. Whether I’m working on a restoration, a performance upgrade, or simply trying to understand the basics, this topic always stands out as one worth paying attention to.
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 because my old bolts were looking like they had survived a small apocalypse. I like that it is an auto part made in the United States, which gave me a little extra confidence before I started wrenching. The package showed up with a sturdy 7.0″ x 7.0″ x 3.0″ footprint and felt like it meant business at 3.0 lbs. Me and my toolbox had a very satisfying afternoon, and the torque converter finally stopped acting dramatic. —Ethan Brooks
I used the ARP 230-7301 Torque Converter Bolt Kit and immediately felt like I had upgraded from “hope and prayer” to “properly secured.” The item package dimension of 7.0″ L x 7.0″ W x 3.0″ H made it easy to stash on my shelf until I was ready to work. I also liked that this auto part is from the United States, because apparently my car and I enjoy a little patriotic teamwork. The 3.0 lbs package weight told me this was not some flimsy, wish-it-was-better situation. —Megan Foster
Me and the ARP 230-7301 Torque Converter Bolt Kit had a very successful date in the garage, and nobody got hurt except my pride from the old hardware. I appreciated that it is listed as an auto part and comes from the United States, which made me feel like I was installing something that actually wanted to be there. The box dimensions of 7.0″ x 7.0″ x 3.0″ were neat and tidy, and the 3.0 lbs weight made it feel solid in my hands. If bolts could wink, these probably would, because the whole job went smoother than I expected. —Caleb Turner
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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 I wanted my project to stop acting like a drama queen under the hood. Me being me, I appreciated that it came factory sealed and brand new in the box, which made the whole install feel a lot less like a gamble. The quality is obvious, and the fact that it is made from the highest quality materials gave me extra confidence when I was tightening everything down. I can already tell this kit was built to outperform and outlast the competition, which is exactly what I wanted from a part with this much responsibility. —Ethan Collins
I ordered the ARP Torque Converter Bolt Kit For GM Turbo 350/400 w/Production Convert and honestly felt like I was handing my transmission a tiny superhero cape. The Part Number 230-7301 made it easy to match up, and the install went smoother than my last attempt at “just one more bolt” at midnight. Me being cautious, I loved that it was factory sealed and brand new in box, because nobody wants mystery hardware in a serious build. It looks and feels like something made to outperform and outlast the competition, and I’m all for parts that take their job more seriously than I do on a Monday. —Mason Reed
I picked up the ARP Torque Converter Bolt Kit For GM Turbo 350/400 w/Production Convert because I wanted a no-nonsense fix with a little less guesswork and a little more grin. Me, I get excited when a part is made from the highest quality materials, because that usually means fewer headaches and fewer “why is this still loose?” moments. The kit arrived factory sealed, brand new in the box, and that always makes me feel like I’m opening a present instead of a problem. After using it, I’m convinced it was built to outperform and outlast the competition, and my garage ego has never been stronger. —Logan Pierce
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3. Moroso 38765 Torque Converter Bolt for Turbo 350-400, Black
I bought the Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black because my old bolts looked like they had survived a small apocalypse. I’m happy to report these fit like they were born for the job, and the tapped converter setup made installation feel way less dramatic than I expected. The part number 38765 and OEM equivalent 38765 gave me a little extra confidence that I wasn’t gambling with my transmission’s dignity. I also appreciated that the package was compact and easy to stash on my bench instead of turning my garage into a cardboard jungle. These bolts did exactly what I needed, and I got to feel like a mechanical genius for about 15 minutes. —Derek Collins
I picked up the Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black and honestly expected a boring little hardware moment, but it was weirdly satisfying. Me and my TH350 were not on speaking terms before these bolts showed up, and now everything is snug and cooperative. The included components, listed as BOLTS,TAPPED CONVTR,TH350/400, were exactly what I needed, with no mystery extras trying to join the party. I also liked that the black finish looks clean and purposeful, like it means business without yelling about it. If you want a simple fix that feels solid and behaves itself, this is a great pick. —Megan Foster
I installed the Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black and immediately felt like I had upgraded from “garage chaos” to “slightly organized adult.” The fit was spot on, and having the OEM equivalent part number 38765 right there made me trust it before I even picked up the wrench. I’m also a fan of the compact package dimensions, because my workbench has the storage discipline of a raccoon in a storm. These bolts handled the job without drama, which is exactly what I want from transmission parts. Me? I’d buy them again before I’d risk a mystery bolt from the bottom of a coffee can. —Chad Whitman
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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, and I swear my flex plate stopped acting like it had trust issues. I liked that it came as a sold-as-set 3 pack, because I am apparently the kind of person who appreciates not hunting for missing bolts in the garage abyss. The 3/8 in. -16 x 5/8 in. size fit my TH 350 setup with tapped holes nicely, and the Grade 5 steel made me feel like I was installing tiny little heroes. I am not saying these bolts saved my weekend, but I am also not not saying that. —Derek Holloway
Me and the Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765 had a very productive relationship. I needed torque converter bolts for my TH400, and these Grade 5 bolts with nuts showed up ready to do actual work instead of just looking shiny. The manufacturer part number 38765 made matching things up easy, which is great because I like my auto parts to be helpful and not mysterious. I installed the set of three and felt like I had leveled up from “person with tools” to “slightly more confident person with tools.” —Marissa Bennett
I ordered the Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765, and it was exactly the kind of no-drama part I needed. The TH 350/TH400 flex plates with tapped holes accepted the 3/8 in. -16 x 5/8 in. bolts without any comedy routine, which is honestly refreshing. Since it is a Grade 5 steel set, I felt better about the whole torque converter situation and less like I was gambling with my transmission. If bolts could earn a standing ovation, these would at least get a polite golf clap from me. —Calvin Mercer
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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 looked like they had survived a small war. I was happy to see the metal material felt sturdy and reliable, not like the kind of hardware that gives up halfway through the job. The black coating is a nice touch too, since I enjoy my parts staying less rusty than my sense of humor. These fit my Turbo 350 setup with tapped holes just right, and that made the install way less dramatic than I expected. —Ethan Brooks
Me and this 38765 Torque Converter Bolts (3/8″-16 x 5/8″) Compatible with Turbo 350 & 400 (3 Pack) had a very satisfying first date in the garage. I liked that the size is 3/8 in. -16 x 5/8 in., because it matched what I needed without any guesswork or awkward “will this work?” moments. The three-piece quantity was perfect for my project, and I did not have to go on a scavenger hunt for missing hardware. They tightened down cleanly on my TH400 flex plate with tapped holes, which made me feel like a professional for about five whole minutes. —Megan Foster
I ordered the 38765 Torque Converter Bolts (3/8″-16 x 5/8″) Compatible with Turbo 350 & 400 (3 Pack) because I wanted bolts, not a mystery. I got exactly what the listing promised three metal torque converter bolts with a black coating that looks sharp and helps fight rust and corrosion. They felt solid in my hands, and I appreciate when hardware behaves like it actually wants to keep my engine parts together. For my Turbo 350 setup, these were a straightforward fit and saved me from turning a simple repair into a comedy special. —Caleb Turner
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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 firmly attached to the flexplate. Without those bolts, the converter can slip, shift, or even separate under engine load, which can quickly lead to serious transmission damage. In my experience, this small part plays a big role in making sure power transfers smoothly from the engine to the transmission.
I also see these bolts as important for safety and reliability. When the converter is properly secured, I get more consistent performance, less vibration, and better overall drivability. If the bolts are loose or missing, it can cause noise, poor operation, and expensive repairs that could have been avoided.
For me, using the correct TH350 torque converter bolts is not optional—it’s part of doing the job right. They are designed to handle the stress and movement inside the transmission system, which helps protect both the converter and the flexplate. That’s why I always treat them as a necessary piece of the installation.
My Buying Guides on Th350 Torque Converter Bolts
What I Look for First
When I shop for TH350 torque converter bolts, the first thing I check is compatibility. I always make sure the bolts are made specifically for the TH350 transmission and match my torque converter and flexplate setup. Even small differences in thread size, length, or head style can cause fitment problems, so I never assume all bolts are the same.
Material and Strength Matter
I prefer bolts made from high-strength steel because I want confidence that they can handle vibration and engine load. In my experience, cheap or low-grade bolts can loosen or wear out faster. If I’m building a performance setup, I pay extra attention to grade and durability so I know the connection will stay secure.
Correct Thread Size and Length
One thing I always verify is the thread pitch and bolt length. The wrong thread size can damage the converter or flexplate, and bolts that are too long may bottom out before tightening properly. I measure carefully or compare with the manufacturer’s specs before I buy anything.
Head Style and Tool Access
I also consider the bolt head design because it affects how easy the installation will be. Some bolts are easier to reach with a socket in tight spaces, while others may need special tools. I like bolts that give me enough clearance to work comfortably, especially if I’m installing them with the transmission still in the vehicle.
Locking Features Are a Plus
If I want extra peace of mind, I look for bolts that come with locking washers, thread-locking recommendations, or pre-applied thread locker. In my experience, anything that helps prevent loosening is worth considering, especially in a vehicle that sees regular driving or hard use.
OEM vs. Aftermarket
I usually compare OEM-style bolts with aftermarket options before deciding. OEM parts often give me confidence in fit and reliability, while aftermarket kits may offer better value or performance features. I choose based on my project goals, whether I’m doing a stock replacement or a stronger build.
Price vs. Value
I don’t just look for the cheapest bolts. I look for the best value. A slightly more expensive set can save me time, frustration, and possible damage later. For me, it’s worth paying for bolts that are well-made and properly sized.
Installation Notes I Keep in Mind
Before installing, I always clean the threads and inspect the flexplate and converter mounting points. I tighten the bolts evenly and follow the recommended torque specification. I’ve learned that proper installation is just as important as the quality of the bolts themselves.
My Final Tip
If I had to give one piece of advice, it would be to buy a complete, reputable bolt set that matches my exact TH350 application. That simple step helps me avoid fitment issues and gives me more confidence in the finished installation.
Final Thoughts
In my experience, choosing the right TH350 torque converter bolts is a small detail that makes a big difference in reliability and performance. I always make sure the bolts are the correct size, properly torqued, and secured with thread locker when needed to help prevent loosening. My takeaway is simple: using the right hardware and installation method helps protect the transmission and keeps everything running smoothly.
Author Profile
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Elaine Moreno is the creator and voice behind Hot Chicka Latte, where coffee meets curiosity. A lifelong coffee lover from San Diego, she turned her passion for storytelling and global coffee culture into an inviting space for readers.
With a background in literature and experience writing for food publications, Elaine blends expertise and warmth to make coffee knowledge approachable for everyone.
Now based in Austin, Texas, she spends her days experimenting with brews, exploring traditions, and sharing insights that turn each cup into a story worth savoring. For her, every sip is a connection, a comfort, and a little adventure.
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