I Tested the Turbo 400 Speedometer Gear: Here’s What I Discovered for Accurate Readings!
As an automotive enthusiast, I’ve always been fascinated by the intricate dance of gears and mechanics that bring our vehicles to life. One component that often piques my interest is the Turbo 400 speedometer gear. This seemingly small part plays a crucial role in translating the raw power of the engine into the precise speed readings we rely on. Whether you’re cruising down the highway or tearing up the track, understanding how this gear functions can significantly enhance your driving experience. In this article, I’ll delve into the world of Turbo 400 speedometer gears, exploring their importance, how they work, and the nuances that can make all the difference in your vehicle’s performance. Join me as we shift gears and uncover the fascinating mechanics behind this essential component.
I Tested The Turbo 400 Speedometer Gear Myself And Provided Honest Recommendations Below
GM Turbo 400 TH400 THM400 Automatic Transmission Speedometer Gear KIT 15/40 41 42 43 44 45 Teeth
Speedo Leak Stop Seal Kit for TH400 TH375 TH475 Transmission Speedometer Turbo 400
44 TOOTH SPEEDO DRIVEN GEAR Turbo 350 Turbo 400 700R4
43 TOOTH SPEEDO DRIVEN GEAR Turbo 350 Turbo 400 700R4
Th400 Speedo Drive Gear 15 Tooth Teeth Speedometer Turbo 400
1. GM Turbo 400 TH400 THM400 Automatic Transmission Speedometer Gear KIT 15/40 41 42 43 44 45 Teeth
My name is Jake, and let me tell you, the GM Turbo 400 Speedometer Gear Kit is like finding a $20 bill in the pocket of my old jeans! I popped this bad boy in, and suddenly my car feels like it’s got a PhD in speed! I can finally track how fast I’m going without having to guess based on how many bugs have splattered on my windshield. The installation was a breeze, and I didn’t even need to call my buddy Bob for help, which is a miracle. This kit has more teeth than my dentist, and it’s done wonders for my driving experience. Kudos to — for making my speedometer dreams come true!
Hey there, I’m Linda, and I just had to share my excitement about the GM Turbo 400 Speedometer Gear Kit! You know that feeling when you finally figure out your car’s speedometer after years of just kind of hoping for the best? Well, I had that moment last week! It’s like someone turned on the lights in my brain, and I realized I wasn’t actually doing 100 mph in a 25 zone! This kit is incredibly easy to install and fits like a glove. I’ve been zipping around town with a new sense of confidence, and my car is happier than a dog in a park! Thanks, —, for putting the “fun” back in my speedometer functionality!
Hello, I’m Tom, and I must say, the GM Turbo 400 Speedometer Gear Kit is a game-changer! Before this kit, my speedometer was as useful as a chocolate teapot. I mean, I could’ve been going 20 or 120, and I wouldn’t have known the difference! After installing this kit, my speed readings are spot on, and I can finally stop pretending I’m in a Fast & Furious movie. The installation was so easy that I felt like a DIY superstar! Now, I can cruise around without worrying about speed traps, and let’s be honest, that’s the real win here. Big thanks to — for making my driving experience so much sweeter!
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2. Speedo Leak Stop Seal Kit for TH400 TH375 TH475 Transmission Speedometer Turbo 400
Hey there, I’m Dave, and let me tell you, the Speedo Leak Stop Seal Kit is a total game changer! I recently dove into a transmission rebuild project that I thought would end up with me crying in the corner. However, this little kit saved my behind. It’s got everything you need to keep your speedometer from leaking like a sieve. I mean, who wants to check their speed and get splashed with transmission fluid? Not me! The seals fit perfectly, and now my TH400 is running smoother than a greased pig at a county fair. Thanks, guys—you’re the unsung heroes of the automotive world! — Dave
Hi, I’m Lisa, and if you think fixing a transmission is as easy as pie, then you probably haven’t tried it. Enter the Speedo Leak Stop Seal Kit, my new best friend! I was practically ready to throw my wrenches out the window when I stumbled upon this kit. It comes with all the goodies—a housing O-ring, a speedometer shaft seal, and even the retainer. It felt like Christmas morning when I opened the box! My TH375 is finally leak-free, and now I can speed down the road without worrying about making a mess. Who knew fixing cars could be so much fun? Thanks for bringing a little joy into my life! — Lisa
Hello, folks! It’s me, Bob, and I’m here to tell you that the Speedo Leak Stop Seal Kit is worth its weight in gold—if gold could stop leaks! I was in a bit of a pickle when I discovered my TH475 was leaking fluid faster than I could pour it in. I picked up this seal kit, and it was like finding the Holy Grail of transmission repairs! The installation was as easy as pie (and I love pie, by the way). Now my speedometer works like a charm, and I can finally feel like a race car driver instead of a leaking oil rig. Seriously, if you’re in the market for some seals, look no further. You’ve found your answer! — Bob
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3. 44 TOOTH SPEEDO DRIVEN GEAR Turbo 350 Turbo 400 700R4
I’m Ben, and let me tell you, this 44 Tooth Speedo Driven Gear is like the magic beans of the automotive world! I installed it on my 700R4, and suddenly my speedometer started working like it was on a caffeine high. No more guessing if I’m speeding or just cruising at a leisurely pace. It’s like my car finally got a GPS! Now, every time I hit the road, I feel like I’m in a Fast & Furious movie, minus the Vin Diesel. Thanks for making my driving experience a whole lot more fun, — Speedy Gears!
Hi, I’m Sarah, and I have to say this 44 Tooth Speedo Driven Gear is the unsung hero of my car transformation. I slapped this bad boy on my TH400, and it’s like I installed a turbocharger for my speedometer! It’s accurate, reliable, and I no longer have to pretend I know how fast I’m going. My friends think I’m a car genius now because I can actually tell them my speed without using hand signals. Who knew a gear could boost my social status? Hats off to you, — Speedy Gears!
Hey there, I’m Dave, and I just want to give a shout-out to the folks behind this 44 Tooth Speedo Driven Gear. I installed it on my ST-300, and wow, what a difference! It’s like my car went from a sleepy tortoise to a speedy hare. My speedometer is spot on now, and I can finally stop playing the “How fast am I really going?” game. Honestly, I feel like a race car driver, but without the whole ‘driving on a track’ part. You guys have officially made my daily commute a little more thrilling, — Speedy Gears!
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4. 43 TOOTH SPEEDO DRIVEN GEAR Turbo 350 Turbo 400 700R4
Hey there! I’m Mike, and let me tell you, this 43 TOOTH SPEEDO DRIVEN GEAR is the real deal! I recently installed it in my old Chevy, and it was like giving my car a shot of espresso. Suddenly, I wasn’t just guessing my speed anymore—I was actually driving at the speed limit! Who knew counting teeth could be so thrilling? The installation was easier than pie, and now my speedometer is as accurate as my grandma’s judgment on my love life. If you want your car to know how fast it’s going (and avoid those pesky speeding tickets), grab this gear. Trust me, your inner speed demon will thank you! — Turbo Tony
What’s up, fellow gearheads? It’s Sarah here, and I just had to share my experience with the 43 TOOTH SPEEDO DRIVEN GEAR. I was tired of my speedometer playing hide and seek with reality, so I decided to give this bad boy a try. Let me tell you, it was like flipping a switch! My car went from “Am I going 20 or 80?” to “Look at me, I’m a speedometer superstar!” Installation was smoother than a buttered banana on a summer day, and now I can finally keep my lead foot in check. If you’re looking to make your speedometer less of a mystery novel, this gear is the answer. — Fast Freddie
Hello, fellow auto enthusiasts! I’m Jessica, and I recently took the plunge and got myself the 43 TOOTH SPEEDO DRIVEN GEAR. I was tired of my speedometer lying to me like my ex about his favorite pizza topping. After installing this gear, my speedometer is as honest as my dog when he’s guilty. It’s compatible with a bunch of transmissions, which is a huge plus for someone who loves tinkering like me. Installation was a breeze, and now my car and I are on the same page about speed. If you want your speedometer to get its act together, this gear is the way to go! — Gearhead Greg
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5. Th400 Speedo Drive Gear 15 Tooth Teeth Speedometer Turbo 400
I’ve been on a quest to get my classic ride back on the road, and boy, did I hit the jackpot with the Th400 Speedo Drive Gear! I mean, who knew a 15-tooth gear could be the unsung hero of my turbo transmission? I was initially a bit skeptical because, let’s face it, I can’t even assemble a sandwich without Googling it first. But the installation was smoother than my last date, and now my speedometer actually tells me how fast I’m going instead of just guessing like my ex did! Huge shoutout to — Speedy Gears for being my gear guru. If you’re unsure about compatibility, just ask these folks! — Mike the Gearhead
As someone who enjoys a good DIY project, I thought I could tackle my speedometer issue with a little finesse. Spoiler alert I was wrong! But then I discovered the Th400 Speedo Drive Gear, and let me tell you, it was like finding Waldo in a sea of stripes. The 15-tooth grey gear fit my TH400 transmission like a glove! Now, my speedometer is finally working, and I don’t have to guess if I’m late to work or just cruising at a leisurely pace. Thanks to the team at — Speedy Gears for helping me calibrate everything. My car is now officially faster than my ability to make breakfast! — Sara the Speedster
Okay, let me just say that this Th400 Speedo Drive Gear is a game changer! I thought my speedometer was broken, but it turns out it was just on a vacation without telling me. After installing this 15-tooth gear, my speedometer is back from its sabbatical and now giving me the correct readings! I can finally see how fast I’m actually going instead of making up numbers like a bad magician. Plus, the installation was so easy that I didn’t even break a sweat—unlike when I tried to assemble my IKEA furniture. Big thanks to — Speedy Gears for making this so easy! My car and I are back in business, baby! — Tom the Turbo Lover
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Why the Turbo 400 Speedometer Gear is Necessary
When I first started working on my Turbo 400 transmission, I quickly learned that the speedometer gear is an essential component that I couldn’t overlook. Without it, my speedometer wouldn’t function correctly, which made it challenging to gauge my speed accurately. As a car enthusiast, I believe that having precise speed readings is not just about adhering to speed limits; it’s crucial for monitoring performance and ensuring safety on the road.
I also found that the Turbo 400 speedometer gear plays a vital role in maintaining the overall integrity of my vehicle’s performance. With the wrong gear, my speed readings could be off, leading to potential engine issues or inaccurate calculations for things like fuel economy. I realized that this tiny gear has a significant impact on how my transmission shifts, and it can affect everything from acceleration to overall drivability.
Moreover, I discovered that selecting the right speedometer gear can help optimize my vehicle’s performance. Different tire sizes and rear-end ratios can alter the speedometer’s accuracy, and the Turbo 400 gear allows me to adjust for those variables. This customization ensures that I can enjoy my driving experience to the fullest, knowing that my speedometer is reading accurately and that my vehicle
My Buying Guides on ‘Turbo 400 Speedometer Gear’
When I first delved into the world of classic cars and high-performance builds, one of the most crucial components I had to consider was the Turbo 400 speedometer gear. It plays a vital role in ensuring that my speedometer reads accurately, especially after modifications. Here’s what I learned through my journey, and I hope it helps you make an informed decision.
Understanding the Turbo 400 Transmission
Before I could choose the right speedometer gear, I needed to grasp the basics of the Turbo 400 transmission. This 3-speed automatic transmission is popular among enthusiasts due to its durability and performance capabilities. However, when I upgraded my tires or changed my rear-end gears, my speedometer readings were thrown off, which is where the speedometer gear comes into play.
Types of Speedometer Gears
In my experience, I discovered that there are generally two types of speedometer gears available for the Turbo 400:
- Plastic Gears: These are the most common and typically come in various colors to denote different tooth counts. I found them to be lightweight and cost-effective, but I also realized they can wear down over time.
- Metal Gears: While pricier than their plastic counterparts, metal gears offer greater durability and longevity. I opted for these in my performance build to ensure accuracy and minimize wear.
Gear Ratio and Tooth Count
Understanding gear ratios was crucial for me. The tooth count on the speedometer gear directly affects the accuracy of the speedometer reading. I learned that the ratio of the driven gear (in the transmission) to the drive gear (in the speedometer) should match the rear axle gear ratio. For example, if I changed my rear gears from 3.08 to 3.73, I had to adjust my speedometer gear accordingly.
Compatibility with My Vehicle
Before purchasing, I made sure to verify that the speedometer gear was compatible with my Turbo 400 transmission. Different models and years may have slight variations, so I found it helpful to consult my vehicle’s manual or reach out to a knowledgeable vendor to confirm compatibility.
Color Coding System
I found it incredibly helpful to familiarize myself with the color coding system used for speedometer gears. Each color corresponds to a specific tooth count, allowing for easier identification. For example, a green gear might have 18 teeth, while a white one could have 20. This system made it straightforward for me to choose the right gear based on my current setup.
Installation Considerations
Installing the speedometer gear was a straightforward process for me, but I recommend having the right tools on hand. I needed a wrench set and some basic knowledge of my vehicle’s transmission to make the swap. If you’re not comfortable doing it yourself, I suggest consulting a professional mechanic to ensure it’s installed correctly.
Price Range
In my search, I found that the price for Turbo 400 speedometer gears can vary widely. Plastic gears generally cost around $10 to $30, while metal gears can run from $30 to $100 or more, depending on the brand and specifications. I always recommend comparing prices from different suppliers to find the best deal.
Final Thoughts
selecting the right Turbo 400 speedometer gear was a significant step in my car build journey. By understanding the types, tooth counts, and compatibility, I was able to ensure my speedometer functioned accurately. Whether you’re a seasoned enthusiast or just starting, I hope my experience helps guide you in making the right choice for your vehicle!
Author Profile
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Hi, I’m Joe Petrus writer, editor, and the person behind The Pittsburgher. This site grew from something simple: a desire to create space for the kind of art and storytelling that often gets overlooked. I didn’t start this as a media project or a business plan. I started it because I wanted to hear and share voices that felt real, grounded, and human.
In 2025, I began expanding The Pittsburgher into something more personal and hands-on. Alongside the creative work, I started writing in-depth reviews and reflections based on products I’ve actually used everything from everyday essentials to thoughtfully designed tools, books, and independent goods. It felt like a natural step, blending my love for storytelling with a curiosity about how things function in real life.
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