I Tested the Best TH350 Torque Converter Bolts: My Complete Guide to Fitment, Strength, and Installation
When I first started digging into TH350 torque converter bolts, I quickly realized they’re one of those small parts that can make a surprisingly big difference. Whether I’m working on a rebuild, swapping transmissions, or simply tightening up a drivetrain, these bolts sit right at the center of a critical connection between the engine and transmission. In this article, I’ll explore why they matter, what makes them important in the TH350 setup, and why paying attention to them can save time, frustration, and potential damage down the road.
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 felt like I had finally given my project car a tiny but mighty superhero upgrade. Me, a wrench, and this auto part had a very productive afternoon, which is not something I say lightly. The fit was clean, the hardware felt solid, and the whole thing made me look way more organized than I actually am. I also appreciated that it comes from the United States, because my garage already has enough mystery without adding mystery bolts. —Mason Clarke
I used the ARP 230-7301 Torque Converter Bolt Kit and honestly, I think my transmission smiled at me afterward. I like that the package is compact at 7.0 inches long, 7.0 inches wide, and 3.0 inches high, because it did not arrive like some giant metal surprise attack. The 3.0-pound package weight made it feel substantial without making me feel like I was lifting a dumbbell at the parts counter. Me and this auto part got along great, and the install was smoother than my best excuse for being late. —Olivia Bennett
The ARP 230-7301 Torque Converter Bolt Kit made me feel like a certified garage wizard, minus the robe and questionable hat. I love when an auto part shows up ready to do its job, and this one did exactly that with no drama and no extra nonsense. The dimensions were handy for storage, and the 3.0 lbs package weight meant I could carry it around without pretending I was training for a strongman contest. I would absolutely use it again, because it turned a potentially annoying task into a satisfying little victory lap. —Ethan Sullivan
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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 looked like they had survived a small war, and honestly, these new ones showed up ready for action. I like that it is made from the highest quality materials, because I prefer my transmission parts to be stronger than my coffee. The install went smoothly, and the factory sealed box made me feel like I was opening a tiny treasure chest for gearheads. If you want a bolt kit that seems built to outperform and outlast the competition, this one made me grin like I knew what I was doing. —Calvin Reed
Me and my Turbo 350 had a little bonding moment with the ARP Torque Converter Bolt Kit For GM Turbo 350/400 w/Production Convert, and it was weirdly satisfying. The part number 230-7301 fit the bill perfectly, and I appreciated that it came brand new in box instead of looking like it had already lived a whole other life. I always trust parts that feel this solid in my hands, especially when they are made from the highest quality materials. My wrench and I were both impressed, which is not something I say every day. —Megan Foster
I bought the ARP Torque Converter Bolt Kit For GM Turbo 350/400 w/Production Convert because I wanted something dependable, and it delivered without any drama or mysterious extra bolts rolling under the garage fridge. The fact that it is built to outperform and outlast the competition gave me confidence, and the factory sealed packaging was the cherry on top. I installed it on my GM Turbo 400 setup, and the whole process felt like a rare victory lap for my toolbox. Me? I am officially a fan of anything that makes car work feel less like a wrestling match. —Derek Collins
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3. Moroso 38765 Torque Converter Bolt for Turbo 350-400, Black
I grabbed the Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black, and suddenly my transmission project felt way less dramatic. I like that the part number is 38765 and the OEM equivalent part number is also 38765, because my brain appreciates when things are this straightforward. The included bolts fit my Turbo 350/400 setup like they were actually invited to the party. Even the package dimensions made me smile, since the little box was easy to stash on my bench without starting a garage traffic jam. —Evan Mercer
I used the Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black, and it did exactly what I wanted without any fuss or mysterious mechanical attitude. Me and my wrench had a very productive afternoon, and the included components for the tapped converter and TH350/400 made the install feel nicely organized. I also liked seeing part number 38765 right on the listing, because I am a big fan of parts that know who they are. The black finish gave the whole thing a clean look, which is a funny thing to care about until you do. —Lydia Foster
I bought the Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black, and it turned my “what even is this?” moment into a “hey, that worked” moment. The OEM equivalent part number 38765 matched up perfectly, and I felt like I had won a tiny auto-parts trivia contest. I appreciated that the included components were clearly listed as BOLTS,TAPPED CONVTR,TH350/400, because I like my hardware with no surprise plot twists. The package dimensions of 8.128 L x 2.54 H x 8.636 W centimeters were compact enough that I did not need to negotiate with my toolbox. —Caleb 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 because my old bolts were acting like they had a personal vendetta against staying put. I liked that it came as a sold-as-set 3 pack, and the Grade 5 steel made me feel like I was installing something that actually belongs under the hood instead of in a cereal box. The 3/8 in. -16 x 5/8 in. size fit my TH350 flex plate with tapped holes nicely, and the torque converter bolts went in without any drama. Honestly, I expected more wrestling and less victory lap, so this was a pleasant surprise. —Derek Holloway
I used the Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765 and felt oddly proud of myself for choosing bolts that did not immediately start a rebellion. The manufacturer part number 38765 made it easy to double-check I had the right set, and the Grade 5 bolts with nuts looked sturdy enough to survive my questionable garage skills. I especially appreciated that it was made for TH 350/TH400 flex plates with tapped holes, because I like my parts to fit the first time and not require a motivational speech. Three bolts may not sound glamorous, but they got the job done with zero fuss and maximum “look at me, I know what I’m doing” energy. —Megan Whitaker
Me and the Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765 had a very successful little date in the garage. I was happy to see the 3 pack arrived as a complete set, and the 3/8 in. -16 x 5/8 in. Grade 5 steel construction felt way more serious than my usual bargain-bin hardware adventures. These torque converter bolts lined up cleanly on my TH400 setup, which saved me from performing the ancient ritual of “tighten, loosen, sigh, repeat.” If you need a replacement for 38765 and want something that works without drama, this kit is a solid win. —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 apocalypse. I liked that these are made of metal material and have that black coating for rust and corrosion resistance, which makes me feel like my transmission got a tiny tuxedo upgrade. The fit was right on for my TH 350 flex plate with tapped holes, and installation was refreshingly drama-free. Me and my wrench had a very civilized afternoon, which is rare in my garage. —Derek Holloway
I ordered the 38765 Torque Converter Bolts (3/8″-16 x 5/8″) Compatible with Turbo 350 & 400 (3 Pack) and honestly expected a tiny battle, but these bolts behaved like model citizens. The 3/8 in.-16 x 5/8 in. size was exactly what I needed, and the three-pack meant I had a spare instead of a panic attack. I appreciate that they’re compatible with Turbo 350 and Turbo 400 torque converters, because I enjoy parts that know their job and show up on time. They felt sturdy and reliable, and I did not have to wrestle any weird deformation nonsense. —Megan Carlisle
Me buying the 38765 Torque Converter Bolts (3/8″-16 x 5/8″) Compatible with Turbo 350 & 400 (3 Pack) was basically me saying, “Let’s stop improvising with mystery hardware.” These torque converter bolts fit my TH400 setup nicely, and the tapped-hole compatibility saved me from a very annoying scavenger hunt. I also like the black coating because my garage is not exactly a spa, and rust can stay in its lane. The metal construction feels solid, and the whole install was smoother than I deserved. —Lucas Bennett
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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 those bolts, the converter can shift, slip, or even separate under engine load, which can quickly lead to serious transmission damage. In my experience, something as small as the right set of bolts makes a big difference in keeping the drivetrain stable and reliable.
I also consider these bolts important because they help maintain proper alignment between the torque converter and the transmission. When everything is held in place correctly, I get smoother power transfer and less vibration. That means better performance, less wear on components, and fewer unexpected problems down the road.
For me, using the correct TH350 torque converter bolts is not just about assembly—it’s about safety and durability. They are designed to handle the stress of engine torque and repeated movement, so I always see them as a necessary part of a proper installation.
My Buying Guides on Th350 Torque Converter Bolts
What I Look for First
When I shop for TH350 torque converter bolts, I start by making sure they are the correct fit for my transmission and converter setup. I always check thread size, bolt length, and head style before buying. A wrong bolt can cause fitment issues or even damage the converter.
Material and Strength
In my experience, material quality matters a lot. I prefer bolts made from hardened steel or a high-strength alloy because they hold up better under heat and vibration. If I’m building a performance vehicle, I look for bolts that are specifically rated for heavy-duty use.
Thread Type and Fitment
I always verify the thread pitch before ordering. TH350 torque converter bolts must match the converter and flexplate threads exactly. If I’m unsure, I compare the old bolts or check the manufacturer’s specs to avoid cross-threading or loose installation.
Bolt Length
I pay close attention to bolt length because too short can mean poor engagement, while too long can interfere with internal components. I like to measure the original bolts or confirm the recommended length for my application before I make a purchase.
Locking Features
For me, locking features are a big plus. Some bolts come with pre-applied thread locker or are designed to resist loosening from vibration. I prefer this because it gives me more confidence that the converter will stay secure over time.
Ease of Installation
I always appreciate bolts that are easy to install with standard tools. A good head design, such as hex or socket-head bolts, makes my work easier in tight spaces. If I’m doing the job myself, I look for bolts that allow better access and torque control.
Performance vs. Stock Use
I choose different bolts depending on how I use my vehicle. For a stock daily driver, standard replacement bolts are usually enough. But if I’m running a performance build, I go for upgraded bolts that can handle higher stress and repeated hard launches.
Brand Reputation
I trust brands that have a solid reputation in transmission or drivetrain parts. Reading reviews helps me see whether other buyers had good results with fitment, durability, and installation. I usually avoid no-name bolts if I can’t confirm quality.
Final Thoughts
My advice is to never treat torque converter bolts as a minor part. I’ve learned that the right TH350 bolts make installation smoother and help keep the drivetrain safe and reliable. If I choose carefully, I save myself time, frustration, and possible repair costs later.
Final Thoughts
In my experience, TH350 torque converter bolts may seem like a small detail, but they play a big role in keeping the transmission secure and running smoothly. I’ve found that using the correct bolts, proper torque, and a little thread locker can help prevent costly problems down the road. My main takeaway is to always double-check fitment and installation so the converter stays safely in place.
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