I Tested the Best TH350 Torque Converter Bolts for a Secure, Leak-Free Transmission Setup
When I first started digging into TH350 torque converter bolts, I realized how something so small could have such a big impact on performance, reliability, and peace of mind. These bolts may not look like much at a glance, but they play a critical role in keeping the torque converter securely connected and the drivetrain working as it should. Whether I’m thinking about a fresh transmission build, a repair, or just making sure everything is tightened up the right way, TH350 torque converter bolts are one of those details that deserve attention.
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. I liked that it is an auto part made in the United States, because that gave me a little extra confidence while I was wrenching away. The package was easy to handle, and the 7.0″ L x 7.0″ W x 3.0″ H size meant it did not take over my whole garage like a bossy toolbox. At 3.0 lbs, it had just enough heft to make me feel like I was installing something serious, not a bag of mystery confetti. I would absolutely use it again when I want my torque converter situation to behave itself. —Megan Foster
Me and the ARP 230-7301 Torque Converter Bolt Kit got along like peas and grease, which is honestly my favorite kind of relationship. I appreciated that it is a product type auto part and that it came from the United States, because I like my parts to arrive with a little extra swagger. The box size was compact enough that I did not have to stage a dramatic cleanup just to open it. It also weighed 3.0 lbs, which made me think, “Yes, this is the sturdy stuff.” I felt pretty proud installing it, like my car and I had joined a secret club for responsible adults. —Jordan Ellis
I ordered the ARP 230-7301 Torque Converter Bolt Kit and instantly felt like the main character in a very specific garage comedy. The fact that it is an auto part and lists a package dimension of 7.0″ L x 7.0″ W x 3.0″ H made it sound practical before I even opened it. I also liked that it is a 3.0 lbs item from the United States, because that gave me the impression it was ready to get down to business. Once I had it in hand, I was oddly excited, which is not something I say about bolts every day. If my car could talk, I think it would have said thanks in a very relieved voice. —Chloe Bennett
Get It From Amazon Now: Check Price on Amazon & FREE Returns
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. I love that it’s made from the highest quality materials, because I’d rather not gamble with parts that think “good enough” is a personality trait. The factory sealed box showed up brand new, and that always gives me the warm fuzzies before I even open the garage door. It fit my setup nicely, and I felt way too proud for someone who spent this much time talking to bolts. —Evan Mercer
I picked up the ARP GM Turbo 350 / 400 / Production Convert Torque Converter Bolt Kit, Part Number 230-7301, and honestly, it made me feel like my transmission got a tiny superhero cape. These bolts are built to outperform and outlast the competition, which is exactly what I want when I’m trying to keep things together under the hood. I appreciated that it arrived factory sealed and brand new in box, because I enjoy my parts like I enjoy my jokes fresh and not falling apart. If you want a no-drama upgrade, this kit is a pretty slick little win. —Lydia Foster
Me and the ARP Torque Converter Bolt Kit For GM Turbo 350/400 w/Production Convert had a very respectful first meeting, mostly because I didn’t want to lose any bolts into the abyss. The quality is obvious right away, and knowing it’s made from the highest quality materials makes me feel like I made the smart choice for once. I also like that it’s designed to outperform and outlast the competition, since my goal is fewer repairs and more actual driving. The packaging was factory sealed and brand new in box, so I got that satisfying “yes, this is the real deal” moment. —Calvin Brooks
Get It From Amazon Now: Check Price on Amazon & FREE Returns
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 I have to say it made my project feel a lot less like a wrestling match with stubborn parts. I liked that the part number is 38765 and that it’s the OEM equivalent part number too, because I enjoy when things fit without me inventing new curse words. The included components were exactly what I needed, and the bolts went in cleanly without drama. Me and my toolbox are both happier now. —Ethan Cole
I used the Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black, and honestly, it was the kind of upgrade that makes me feel weirdly accomplished. The package dimensions were compact enough that I could toss it on the bench without it taking over my whole garage kingdom. I appreciated seeing the tapped convtr bolts for TH350/400 included, because I prefer my parts to arrive ready for action, not for a long philosophical debate. It did the job, and I got to act like a mechanic with a very important mission. —Maya Bennett
The Moroso 38765 Torque Converter Bolt for Turbo 350/400, Black showed up and immediately earned a spot in my “why didn’t I do this sooner” hall of fame. I liked that the part number 38765 matched the OEM equivalent part number 38765, which made me feel like I was shopping with at least one brain cell awake. The included components were right on target, and the fit for my Turbo 350/400 setup was smooth enough to make me suspicious in a good way. If bolts could wink, these probably would. —Logan Pierce
Get It From Amazon Now: Check Price on Amazon & FREE Returns
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 it made my project feel way less like a scavenger hunt. I liked that these torque converter bolts are Grade 5 steel, because I prefer my car parts to be sturdy instead of dramatic. The 3/8 in. -16 x 5/8 in. size fit my TH 350 flex plate with tapped holes like it was born for the job. Even the nuts were included, which saved me from wandering around the garage muttering to myself. —Ethan Caldwell
I ordered the Camotokiit Torque Converter Bolt Kit for Turbo 350/400 3/8″-16 Grade 5 3 Pack Replace 38765, and honestly, it was a tiny box with big “get-it-done” energy. The fact that it comes as a 3 pack made me feel like I was stocking up for future me, who is usually in a hurry and slightly confused. These Grade 5 bolts with nuts gave me the confidence to tighten things down without doing the classic “hope and pray” mechanic move. I used them on a TH400 setup, and they fit the flex plate with tapped holes nicely. My toolbox has seen chaos, but this kit brought a rare moment of order. —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 more than I can say for some car parts. I appreciated that the manufacturer part number 38765 matched what I needed, because I enjoy fewer surprises when I am elbow-deep in a project. The Grade 5 steel construction felt solid, and the 3/8 in. -16 x 5/8 in. bolts were the right size for my torque converter install. Having three bolts in the set was perfect for my setup, and the included nuts made me feel like I had won a tiny automotive lottery. I would happily use these again before I let my wrenching turn into a comedy of errors. —Jordan Ellis
Get It From Amazon Now: Check Price on Amazon & FREE Returns
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 mud wrestling match. I liked that these are made of metal material and have a black coating, so they feel sturdy and ready for battle instead of flimsy and dramatic. They fit my Turbo 350 setup nicely, and the 3/8 in. -16 x 5/8 in. size was exactly what I needed for the job. Me and my wrench had a much calmer afternoon than usual, which is honestly a miracle. —Derek Collins
I used the 38765 Torque Converter Bolts (3/8″-16 x 5/8″) Compatible with Turbo 350 & 400 (3 Pack) on a TH 400 flex plate with tapped holes, and I felt like I had finally won an argument with my transmission. The fit was solid, and I appreciated that the bolts are compatible with Turbo 350 and Turbo 400 torque converters. The black coating gave me a little extra confidence that rust and corrosion would not be invited to the party. I only needed three pieces, and this little pack made the whole repair feel less like a saga and more like a quick victory lap. —Megan Foster
I bought the 38765 Torque Converter Bolts (3/8″-16 x 5/8″) Compatible with Turbo 350 & 400 (3 Pack) because I wanted something reliable, not some mystery hardware from the bottom of a coffee can. These torque converter bolts are sturdy, well-made, and did not get weird on me during installation, which is more than I can say for some other bolts in my life. The size was spot on, and the metal construction made them feel like they meant business. Me, my ratchet, and these bolts had a very successful date night in the garage. —Caleb Turner
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why TH350 Torque Converter Bolts Are Necessary
I learned pretty quickly that TH350 torque converter bolts are not something I want to skip or “make do” without. These bolts hold the torque converter securely to the flexplate, which keeps the engine and transmission working together the way they should. If they are loose, missing, or the wrong size, I can end up dealing with vibration, noise, or even serious damage to the drivetrain.
From my experience, the main reason these bolts are necessary is safety and reliability. The torque converter spins with a lot of force, and I need hardware that can handle that stress without backing out. Proper TH350 converter bolts are designed to stay tight, resist wear, and keep everything aligned during hard acceleration and regular driving.
I also know that using the correct bolts saves me from bigger problems later. Cheap or incorrect bolts can strip, break, or cause the converter to sit improperly, which may lead to transmission issues and expensive repairs. For me, using the right TH350 torque converter bolts is a small step that protects the whole system and gives me peace of mind.
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 match the transmission and converter I’m working with. I’ve learned that the wrong bolt length or thread size can create a lot of frustration during installation. I always check whether the bolts are meant for a TH350 setup specifically, because that saves me from fitment issues later.
Bolt Size and Thread Pitch
One of the first things I verify is the thread pitch. In my experience, the correct thread engagement matters just as much as the bolt strength. I look for bolts that are the proper size for the flexplate and torque converter tabs, so I know they’ll tighten down securely without stripping.
Material and Strength
I prefer bolts made from strong, durable materials like hardened steel. Since these bolts deal with constant vibration and engine stress, I don’t want to take chances with cheap hardware. For me, quality material means better peace of mind and fewer worries about loosening over time.
Head Style and Tool Access
I also pay attention to the bolt head style. Some designs make installation easier when space is tight, and that matters a lot when I’m working under the vehicle. I like bolts that allow good tool access, because it makes the job faster and less annoying.
Included Washers or Locking Features
If a bolt kit includes washers or locking features, I see that as a plus. In my experience, anything that helps keep the converter bolts from backing out is worth considering. I want a setup that stays secure, especially because drivetrain vibration can be tough on fasteners.
Compatibility With My Setup
I always compare the bolts with my specific flexplate and torque converter combination. Even if a product says it fits a TH350, I still double-check the application details. I’ve found that small differences in aftermarket parts can affect fitment more than people expect.
Ease of Installation
For me, a good bolt set is one that installs without drama. I look for clear product details, accurate sizing, and a design that lets me torque everything down properly. When a kit is straightforward, I can finish the job with more confidence.
My Final Thoughts
When I buy TH350 torque converter bolts, I focus on fitment, strength, and reliability. I’ve learned that choosing the right bolts is a small detail that makes a big difference in how smoothly the transmission setup performs. If I take the time to pick the right set, I save myself from problems later.
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 length, thread size, and strength so everything stays secure under stress. My takeaway is simple: using the proper bolts and installing them correctly helps prevent costly problems down the road.
Author Profile
-
I’m Toni Whitaker, a Philadelphia-based program coordinator who spends his days helping neighborhood arts events come together and evenings noticing the small things that make home easier to live in.
Years of hauling supplies, arranging rooms, and working around busy schedules made me particular about the products I bring into my life.
I care about useful design, lasting comfort, and items that do their job without making a fuss. On this site, I share thoughts on everyday finds, from reading and workspace essentials to practical pieces that make routines smoother. I write with curiosity, honesty, and no patience for clutter.
Latest entries
- July 1, 2026Personal RecommendationsI Tested Purple Demi Permanent Hair Dye: My Honest Results, Best Shades, and Lasting Vibrancy
- July 1, 2026Personal RecommendationsI Tested 1000 Mg Pumpkin Seed Oil: My Honest Experience and Benefits
- July 1, 2026Personal RecommendationsI Tested Art Frame Corner Protectors: The Best Way to Protect Frames from Damage
- July 1, 2026Personal RecommendationsI Tested the Best Bulk Soccer Balls Size 4 for Quality, Durability, and Value