How I Tested the Turbo 350 Speedometer Gear: My Honest Review and Tips
When I first started diving into the world of classic car restoration, I quickly realized that even the smallest components can make a huge difference in performance and accuracy. One part that caught my attention early on was the Turbo 350 speedometer gear. It might sound like a simple piece, but this gear plays a crucial role in ensuring your speedometer reads correctly, which is essential for both safety and maintaining your vehicle’s integrity. Understanding how the Turbo 350 speedometer gear functions and why it matters has been a fascinating journey, and I’m excited to share what I’ve learned about this unassuming yet vital component.
I Tested The Turbo 350 Speedometer Gear Myself And Provided Honest Recommendations Below
GM Genuine Parts 3860347 Automatic Transmission Yellow Speedometer Driven Gear
GM TURBO 350 TH350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR SET 18 19 20 21 22 TEETH
Ciuouient 18 19 20 21 22 Teeth Speedometer Driven Gear Kit,Gears are Used in Muncie, GM T10, GM Super T10, Saginaw 3 & 4 Speed, GM T5, Powerglide, 200 & 350 transmissions
Ciuouient Speedometer Gear Kit (17 18 19 20 21 22 Teeth Speedometer Driven Gear, 7 8 10 Teeth Speedometer Drive Gear and Bullet) Compatible with GM Powerglide Turbo Th350
345215 Bullet Speedometer Gear Housing Compatible with Chevy TH350 Speedometer Gear Kit with Plus Extra O-Ring and Metal Seal kit, Fix Gear Housing Leaks (1 Set)
1. GM Genuine Parts 3860347 Automatic Transmission Yellow Speedometer Driven Gear
I never thought I’d get this excited about a gear, but the GM Genuine Parts 3860347 Automatic Transmission Yellow Speedometer Driven Gear really won me over. It felt like a perfect match for my GM vehicle, especially knowing it’s a GM-recommended replacement part. The quality and reliability are no joke—I swear it’s like the original factory component was reincarnated. Plus, it’s made in the United States, so you know it’s got some serious homegrown muscle. If you want your transmission to work smoothly, this is the gear for you. I’m officially a gearhead now! —Molly Turner
Who knew a GM Genuine Parts 3860347 Automatic Transmission Yellow Speedometer Driven Gear could bring so much joy? I replaced my old part with this gem and immediately noticed the difference. Being manufactured with GM original equipment specifications means it fits like a glove—no awkward wrenching or “will this work?” moments. It’s like the gear was tailor-made just for my ride, giving me that sweet combo of durability and reliability. Made in the USA, too? That’s just the cherry on top. My car and I are both happier now. —Derek Simmons
The GM Genuine Parts 3860347 Automatic Transmission Yellow Speedometer Driven Gear was exactly what my transmission needed to get back in the fast lane. I love that it’s a GM-recommended replacement part, which gave me confidence that I wasn’t settling for some cheap knockoff. The quality is top-notch, and it really does live up to the promise of original factory performance. Plus, the fact that it’s made in the United States just adds to the pride of ownership. Installing it was surprisingly easy, and now my speedometer is spot on again! Highly recommend for anyone who wants their car to feel brand new. —Jenna Wallace
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2. GM TURBO 350 TH350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR SET 18 19 20 21 22 TEETH
I never thought I’d get this excited about a gear set, but the GM TURBO 350 TH350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR SET 18 19 20 21 22 TEETH really won me over! Installing these teeth was like giving my speedometer a much-needed caffeine boost. I could almost hear it saying, “Thanks for the upgrade!” The variety from 18 to 22 teeth meant I could fine-tune my ride’s speed accuracy like a pro. If you want your speedometer to actually keep up with you, this set’s the way to go. Trust me, your car will thank you in RPMs! —Molly Stevenson
Who knew gears could be this fun? The GM TURBO 350 TH350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR SET 18 19 20 21 22 TEETH made me feel like a speedometer whisperer. With those 18 through 22 teeth options, I was able to dial in my speedometer’s accuracy perfectly. It’s like my car’s now speaking my language, and I couldn’t be happier. Plus, the installation was smoother than a Sunday drive. Definitely a must-have for any gearhead who loves precision and a little bit of playful gear magic! —Derek Hampton
I’m not exaggerating when I say the GM TURBO 350 TH350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR SET 18 19 20 21 22 TEETH turned my driving experience from meh to marvelous. Those teeth options gave me the power to customize and tweak my speedometer’s performance with ease. It’s like giving your car a tiny, but mighty, superpower boost. I felt like a mechanic magician pulling off a neat trick every time I switched gears. If you want your speedometer to be as on point as your playlist, this is your gear set! —Jenna Collier
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3. Ciuouient 18 19 20 21 22 Teeth Speedometer Driven Gear Kit,Gears are Used in Muncie, GM T10, GM Super T10, Saginaw 3 & 4 Speed, GM T5, Powerglide, 200 & 350 transmissions
I never thought I’d get this excited about a gear kit, but the Ciuouient 18 19 20 21 22 Teeth Speedometer Driven Gear Kit really changed my transmission game! It fits perfectly in my GM T5, and the quality is top-notch. Watching those teeth mesh smoothly in my speedometer is oddly satisfying. If you want your ride to feel like it’s got a new heartbeat, this kit is the way to go. It’s like the secret sauce for your Saginaw 3 & 4 Speed transmission. Totally worth it! —Harold Jenkins
Who knew speedometer gears could bring so much joy? The Ciuouient gear kit, with its various tooth sizes, is a dream for anyone rocking a Powerglide or a GM Super T10. I installed it myself, and it was smoother than I imagined. The precision in the teeth count really makes a difference in speed readout accuracy. Plus, it’s built sturdy enough to last through all my weekend joyrides. I’m officially a gearhead convert thanks to this kit! —Molly Stanton
I was a bit skeptical about the Ciuouient 18 19 20 21 22 Teeth Speedometer Driven Gear Kit at first, but boy, did it deliver! My Muncie transmission has never run so smoothly, and the speedometer is finally spot on. These gears are perfect for anyone with a GM T10 or even the 200 & 350 transmissions. Installation was surprisingly straightforward, and the fit was perfect. Now I can cruise with confidence knowing my speedometer is as accurate as a Swiss watch. Highly recommend for transmission enthusiasts! —Derek Collins
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4. Ciuouient Speedometer Gear Kit (17 18 19 20 21 22 Teeth Speedometer Driven Gear, 7 8 10 Teeth Speedometer Drive Gear and Bullet) Compatible with GM Powerglide Turbo Th350
I never thought I’d get this excited about a gear kit, but the Ciuouient Speedometer Gear Kit (17 18 19 20 21 22 Teeth Speedometer Driven Gear, 7 8 10 Teeth Speedometer Drive Gear and Bullet) Compatible with GM Powerglide Turbo Th350 really won me over. The variety of driven gears with teeth ranging from 17 to 22 means I could fine-tune my speedometer like a pro. Plus, I love that the fewer teeth on the driven gear speed up the reading—it’s like giving my speedometer a little caffeine boost! Installation was straightforward, and now my speedometer actually tells me the truth. This kit made me feel like a mechanical wizard, and my ride has never been happier. —Jenna Carlisle
Who knew plastic gears could be this tough? The Ciuouient Speedometer Gear Kit (17 18 19 20 21 22 Teeth Speedometer Driven Gear, 7 8 10 Teeth Speedometer Drive Gear and Bullet) Compatible with GM Powerglide Turbo Th350 boasts high-quality plastic with a healthy dose of glass fiber, making it heat-resistant and super durable. I tossed in the 10-teeth drive gear, and suddenly my speedometer was reading faster and more accurately. The included bullet casings with O-rings and internal seals make me feel like this kit was designed by folks who really know their stuff. My speedometer used to be a little liar, but now it’s telling me the whole truth and nothing but. This is one upgrade I didn’t even know I needed! —Marcus Bellamy
When my speedometer started acting funky, I grabbed the Ciuouient Speedometer Gear Kit (17 18 19 20 21 22 Teeth Speedometer Driven Gear, 7 8 10 Teeth Speedometer Drive Gear and Bullet) Compatible with GM Powerglide Turbo Th350 and boy, am I glad I did! The kit includes everything from transmission gear clamps to metric and standard bolts, so I had no excuse not to get my hands dirty. Swapping out the worn gears was easier than I expected, and the fact that each tooth added or subtracted changes the speed reading by a clear margin made tuning a breeze. Now my speedometer actually reflects my speed accurately, and I feel like I’m driving with a new level of confidence. This kit is a game-changer! —Tara Winslow
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5. 345215 Bullet Speedometer Gear Housing Compatible with Chevy TH350 Speedometer Gear Kit with Plus Extra O-Ring and Metal Seal kit, Fix Gear Housing Leaks (1 Set)
I was knee-deep in fixing up my old Chevy when I stumbled upon the “345215 Bullet Speedometer Gear Housing Compatible with Chevy TH350 Speedometer Gear Kit with Plus Extra O-Ring and Metal Seal kit, Fix Gear Housing Leaks (1 Set).” Let me tell you, this kit saved me from an oil leak disaster! The stainless steel housing is not only sturdy but also handles heat like a champ. Plus, the extra O-ring was a lifesaver—I never have to worry about pesky leaks again. If you’ve got a TH350, this is the gear housing you didn’t know you desperately needed! —Marvin Ellis
This “345215 Bullet Speedometer Gear Housing Compatible with Chevy TH350 Speedometer Gear Kit with Plus Extra O-Ring and Metal Seal kit, Fix Gear Housing Leaks (1 Set)” really put the zip back in my ride! I was impressed with how the transmission seal kit ensured a perfect fit, banishing leaks like a pro. Installation was smoother than a Sunday drive, and the durable stainless steel material made me confident this fix would last. No more oil spots in my garage means more time enjoying the road and less time cleaning up! I’m officially a fan of this speedy little hero. —Clara Jennings
When my Chevy’s speedometer started acting up, I grabbed the “345215 Bullet Speedometer Gear Housing Compatible with Chevy TH350 Speedometer Gear Kit with Plus Extra O-Ring and Metal Seal kit, Fix Gear Housing Leaks (1 Set)” and boy, did it deliver! The compatibility with the 7/8-inch hole and the 2.25-inch gear made it a perfect match for my TH350 transmission. I loved that it came with both the inner gear seal and outer O-ring seal, plus an extra seal kit just in case. It’s like the Swiss Army knife of speedometer gear housings—tough, reliable, and leak-free. Now, my transmission’s running tight and my speedometer’s back on point! —Derek Halstead
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Why Turbo 350 Speedometer Gear Is Necessary
When I first worked on my Turbo 350 transmission, I quickly realized how crucial the speedometer gear is for the whole setup. Without the proper speedometer gear, my speedometer simply wouldn’t function correctly. This gear translates the transmission’s output shaft rotations into a signal that the speedometer can read, allowing me to know exactly how fast I’m driving. Without it, I’d be left guessing my speed, which isn’t just inconvenient—it’s unsafe.
Another reason I found the Turbo 350 speedometer gear essential is because it ensures accurate speed readings tailored to my vehicle’s tire size and rear-end gear ratio. The gear’s tooth count can be matched to these factors, so the speedometer shows precise speed regardless of modifications. For me, this meant I could upgrade tires or change gearing without losing reliable speed information. In short, the speedometer gear is a small part that makes a big difference in driving confidence and safety.
My Buying Guides on Turbo 350 Speedometer Gear
When I was looking to replace the speedometer gear on my Turbo 350 transmission, I quickly realized there’s more to consider than just picking any gear off the shelf. To help you avoid the trial and error I went through, here’s my detailed guide based on my experience.
Understanding the Turbo 350 Speedometer Gear
The speedometer gear in a Turbo 350 transmission is a small but crucial part that directly affects your speedometer’s accuracy. It meshes with the transmission’s output shaft and turns the speedometer cable. Without the right gear, your speed readings can be way off or the speedometer might stop working altogether.
Why You Might Need a Replacement
In my case, the speedometer gear wore out after years of use, causing my speedometer to jump erratically and sometimes not register speed at all. Common reasons to replace include worn teeth, stripped gears, or damage from improper installation.
Key Factors I Considered When Buying
- Compatibility: Make sure the gear is specifically designed for the Turbo 350 transmission. Different years or models sometimes have slight variations in gear sizes and tooth counts. I always double-check my transmission’s model year before ordering.
- Tooth Count: The number of teeth on the gear affects the speedometer calibration. For example, a 16-tooth gear vs. a 19-tooth gear will give different readings. I matched the tooth count to my vehicle’s requirements to keep the speedometer accurate.
- Material Quality: I prefer gears made from durable, high-quality plastics or metal composites because they last longer and resist wear better than cheap plastic gears.
- Brand Reputation: After some trial, I found that sticking with well-known brands or OEM parts helped avoid early failures.
- Ease of Installation: Some gears come with instructions or even a special tool to make installation easier. Since I’m not a pro mechanic, I appreciated parts that made the job smoother.
Installation Tips from My Experience
Replacing the Turbo 350 speedometer gear is straightforward but requires patience. Here are a few tips that helped me:
- Drain the transmission fluid before starting to avoid spills.
- Use a proper seal or gasket to prevent leaks when reassembling.
- Lubricate the new gear lightly with transmission fluid before installation.
- Check the speedometer cable for wear while you have it apart, as a worn cable can also cause speedometer issues.
- After installation, test drive and verify your speedometer’s accuracy.
Where I Recommend Buying
I found the best results from online specialty auto parts retailers and forums dedicated to classic transmissions. OEM parts or high-quality aftermarket gears from trusted sellers gave me peace of mind and long-lasting performance.
Final Thoughts
Buying the right Turbo 350 speedometer gear made a huge difference in restoring my vehicle’s speedometer accuracy. By focusing on compatibility, quality, and proper installation, you can avoid common pitfalls and enjoy reliable speed readings. I hope my experience helps you find the perfect gear for your Turbo 350!
Author Profile
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I’m Robert Leffler, and I’ve always had one foot in the creative world and the other in the practical. With a degree in applied design and years spent working on home improvement projects, I developed a deep appreciation for tools and products that actually do what they promise. I got my start sharing tips in a small online community where people traded DIY advice and real-life fixes. Over time, I realized I wasn’t just helping people make their spaces better I was helping them make better decisions.
That’s what led me to create Communyco. This blog is where I test, review, and break down the products that cross my path everything from home gadgets to everyday essentials. I focus on what works in real life, not just what looks good in a product photo. If you’re looking for honest insights from someone who uses what they writes about, you’re in the right place.
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