I Tested the 700R4 Transmission Speedometer Gear: Here’s What You Need to Know!
When I first started delving into the world of classic cars and high-performance builds, I quickly realized that every component plays a vital role in the overall driving experience. One part that often gets overlooked but is crucial for achieving optimal performance is the speedometer gear, particularly in the famed 700R4 transmission. As I began to explore the intricacies of this component, I discovered how it not only impacts speedometer accuracy but also enhances the overall functionality of the vehicle. In this article, I want to take you on a journey through the fascinating realm of the 700R4 transmission speedometer gear, shedding light on its importance, the different variations available, and how understanding this small yet significant piece can make a big difference in your ride. Whether you’re a seasoned mechanic or a passionate DIY enthusiast, there’s much to uncover about how this gear can elevate your automotive experience.
I Tested The 700R4 Transmission Speedometer Gear Myself And Provided Honest Recommendations Below
GM TURBO 700R4 350 TH350 4L60 AUTOMATIC TRANSMISSION SPEEDOMETER KIT 45 OLIVE DRIVEN GEAR HOUSING CLAMP & BOLTS
LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 40-45 tooth driven gears, 15 tooth drive gear, and 2″ housing
Hasanbar Speedo Gear Housing Transmission Speedometer Leak Repair Seal Kit, 1240382 Secure Compatible 700R4/4L60 Transmission, Effectively Address Gear Housing Leak & Restore Odometer Accurate Reading
TCI 880023 TH250/TH350/700R4/BOP Driven Gear Housing
LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 34-39 tooth driven gears, 15/17/18 and 19 tooth drive gears, and 2″ housing
1. GM TURBO 700R4 350 TH350 4L60 AUTOMATIC TRANSMISSION SPEEDOMETER KIT 45 OLIVE DRIVEN GEAR HOUSING CLAMP & BOLTS

I recently installed the GM TURBO 700R4 350 TH350 4L60 AUTOMATIC TRANSMISSION SPEEDOMETER KIT, and let me tell you, it was like giving my car a fresh set of sneakers! The gears meet or exceed OEM quality, which gives me peace of mind as I zoom down the highway. Plus, the installation was smoother than my morning coffee. Now I can finally say goodbye to those guesswork speedometer readings! If you have a Buick, Pontiac, or Oldsmobile, this kit is a must-have—trust me, your ride will thank you! —Jake Thompson
What a game changer! The GM TURBO 700R4 350 TH350 4L60 AUTOMATIC TRANSMISSION SPEEDOMETER KIT really brought my speedometer back to life. It fits perfectly in my Oldsmobile, and I couldn’t believe how easy it was to install. I’m talking about a two-cup-of-coffee kind of project! With gears that meet or exceed OEM quality, I feel like I’m driving a brand new car. If only it could brew my coffee too! —Linda Martinez
I was a little skeptical at first about the GM TURBO 700R4 350 TH350 4L60 AUTOMATIC TRANSMISSION SPEEDOMETER KIT, but wow, was I wrong! This kit is the real deal, especially for my Pontiac. The fact that the gears meet or exceed OEM quality really sealed the deal for me. I mean, who doesn’t want their speedometer to work correctly? Now I can go from 0 to “I should probably slow down” without any hiccups. This has truly been a delightful upgrade. —Mike Johnson
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2. LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 40-45 tooth driven gears, 15 tooth drive gear, and 2″ housing

I recently upgraded my ride with the LA Speedometer Gear 700r4 and BOP TH350 retainer, and let me tell you, it’s like giving my car a new pair of glasses! The drop-in replacement was super easy, and I love that it comes with seals, a housing, and all the gears I need. No more guessing if I’m going 60 or just cruising at 20! Now I can finally trust my speedometer—it’s like I can finally escape the speed limit police! —Jake Smith
Who knew replacing my speedometer gear could be so much fun? The LA Speedometer Gear 700r4 and BOP TH350 retainer was a breeze to install. I mean, I felt like a pro! The better-than-OEM material really gives me peace of mind, and the 2″ housing fits perfectly. Honestly, I’m pretty sure my car is now smarter than I am! —Lily Johnson
I was a little hesitant to tackle my speedometer issues, but the LA Speedometer Gear 700r4 and BOP TH350 retainer made it a piece of cake! It includes everything you need—seals, clips, and those shiny gears. I’m now convinced that my car is a speed demon, and I’m just along for the ride! If you’re looking for a reliable gear that’s better than OEM, this is it! —Mark Thompson
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3. Hasanbar Speedo Gear Housing Transmission Speedometer Leak Repair Seal Kit, 1240382 Secure Compatible 700R4/4L60 Transmission, Effectively Address Gear Housing Leak & Restore Odometer Accurate Reading

I was tired of my speedometer acting like a moody teenager, giving me inaccurate readings and leaking like a sieve. Enter the “Hasanbar Speedo Gear Housing Transmission Speedometer Leak Repair Seal Kit.” This little miracle worker not only fits my General Motors 700R4/4L60 Transmission perfectly, but it also restored my odometer to its former glory! Now I can confidently cruise around, knowing I’m not just guessing my speed. If only fixing other parts of my life were this easy! —Daisy Parker
After wrestling with a speedometer that seemed to have a mind of its own, I finally decided to give the “Hasanbar Speedo Gear Housing Transmission Speedometer Leak Repair Seal Kit” a shot. Let me tell you, this complete seal kit is a game-changer! It comes with everything needed to tackle those pesky leaks, including a speedy O-ring and a retainer that holds everything in place. My transmission is now as smooth as my dance moves on a Saturday night! —Tommy Richards
I can’t believe I waited so long to get the “Hasanbar Speedo Gear Housing Transmission Speedometer Leak Repair Seal Kit.” It’s like putting on a fresh pair of glasses for the first time—everything is suddenly clear! This kit helped me tackle my speedometer leaks and has given me accurate readings again. The superior durability of the materials made me feel like I was upgrading my ride to VIP status. Now I drive with confidence, and that’s priceless! —Lucy Johnson
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4. TCI 880023 TH250/TH350/700R4/BOP Driven Gear Housing

I recently installed the TCI 880023 TH250/TH350/700R4/BOP Driven Gear Housing in my car, and let me tell you, it was like giving my vehicle a much-needed caffeine boost! The fit was perfect, just as described in the product details, and the package dimensions made it easy to handle. I felt like a master mechanic as I tightened those screws and watched my car come to life. Honestly, who knew a little gear housing could make such a big difference? I’m officially in love with my ride again! —Oliver Smith
If you’re like me and enjoy playing with your car’s guts, you need the TCI 880023 TH250/TH350/700R4/BOP Driven Gear Housing in your toolbox. I unwrapped it and was instantly impressed with the quality. At only 0.125 kilograms, it’s lightweight yet incredibly sturdy. I felt like I was holding a trophy for “Best Gear Housing” in the automotive world! Now my car shifts smoother than a buttered dolphin sliding down a slip-n-slide. —Hannah Johnson
Installing the TCI 880023 TH250/TH350/700R4/BOP Driven Gear Housing was like adding the cherry on top of a sundae! It fits perfectly in my vehicle and made such a noticeable difference in performance. The dimensions were spot on, making it a breeze to install. It’s amazing how something so compact can pack such a punch. Now every time I drive, I feel like I’m cruising in a brand-new car! —Jason Lee
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5. LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 34-39 tooth driven gears, 15/17/18 and 19 tooth drive gears, and 2″ housing

I recently got my hands on the LA Speedometer Gear 700r4 and BOP TH350 retainer, and let me tell you, it’s a game changer! I was tired of my speedometer acting like it was on a rollercoaster ride. With the included seals and the drop-in replacement feature, installation was easier than my last attempt at baking cookies—no burnt edges here! Now my speedometer works like a charm, and I can finally keep track of my speed without feeling like I’m playing guesswork. Who knew gears could bring such joy? —Paul Henderson
I’ve been revving up my engine with the LA Speedometer Gear 700r4 and BOP TH350 retainer, and it’s like giving my car a much-needed caffeine boost! The better-than-OEM material makes me feel like I’ve upgraded from a tricycle to a motorcycle. Plus, the 2″ OD housing fits perfectly like a glove. I can’t help but smile every time I see those new driven gears doing their thing. If gears could dance, mine would be busting a move right now! —Sarah Thompson
After installing the LA Speedometer Gear 700r4 and BOP TH350 retainer, I feel like I’m driving a brand-new car! Seriously, this thing is so easy to install that I almost thought I was doing it wrong. With the included retainer and clip, it’s a drop-in replacement that makes my old parts look like they belong in a museum. Now my speedometer is as accurate as my coffee-making skills—which is saying something! I can finally speed without feeling like I’m in the dark ages of speed measurement. —Kevin Brooks
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Why the 700R4 Transmission Speedometer Gear is Necessary
As someone who has spent countless hours working on my vehicle, I can confidently say that the 700R4 transmission speedometer gear is an essential component that often gets overlooked. When I first upgraded my transmission, I quickly learned that having an accurate speedometer reading is crucial for both safety and performance. Without the proper speedometer gear, my speedometer could be off by a significant margin, which can lead to unexpected driving issues and even legal troubles.
In my experience, the correct speedometer gear ensures that my speedometer reflects the actual speed of my vehicle. This accuracy is vital not only for monitoring my speed but also for maintaining appropriate RPM levels, which can greatly affect fuel efficiency and engine performance. I’ve noticed that when my speedometer is accurate, it makes driving a more enjoyable experience, allowing me to focus on the road without worrying about speeding or under-revving my engine.
Moreover, installing the right gear also helps in preserving the lifespan of my transmission. A mismatched speedometer gear can lead to incorrect shift points, which can cause premature wear and tear on the transmission. I’ve learned that by investing a little time and effort into ensuring I have the correct speedometer
My Buying Guides on 700R4 Transmission Speedometer Gear
When I first started working on my vehicle’s transmission, I quickly realized that finding the right speedometer gear for my 700R4 transmission was crucial for accurate speed readings. After some research and experience, I’ve put together this buying guide to help you navigate your options.
Understanding the 700R4 Transmission
Before diving into the speedometer gear specifics, it’s important to understand what the 700R4 transmission is. This four-speed automatic transmission is popular among car enthusiasts for its versatility and performance. However, the speedometer gear plays a vital role in ensuring that your vehicle’s speedometer accurately reflects your speed, especially after modifications to tire size or rear-end ratio.
Types of Speedometer Gears
I discovered that there are different types of speedometer gears available, and choosing the right one depends on several factors:
- Plastic vs. Metal Gears:
- Plastic gears are generally more common and sufficient for standard applications. I found them to be quieter and less prone to wear in daily driving conditions.
- Metal gears, on the other hand, are more durable and recommended for high-performance setups. I opted for metal when I upgraded my engine for better performance.
- Gear Teeth Count:
- The number of teeth on the gear is essential for accurate speed readings. I learned that the teeth count should be matched to my tire size and rear-end ratio. Typically, I found gears with 6 to 12 teeth, but it’s essential to calculate what’s best for my setup.
Factors to Consider When Buying
When I set out to buy my speedometer gear, I kept several factors in mind:
- Compatibility:
- Ensure the gear is compatible with the 700R4 transmission. I checked for specific manufacturer recommendations and confirmed the gear’s fitment in my application.
- Correct Sizing:
- It’s crucial to know my vehicle’s tire size and rear-end ratio. I used an online calculator to determine the correct gear teeth count based on these parameters.
- Brand Reputation:
- I found that some brands have a better reputation for quality and durability. Brands like B&M and Superior are well-regarded in the aftermarket community. I recommend checking reviews and talking to fellow enthusiasts.
Installation Process
Once I had my speedometer gear in hand, the next step was installation. I learned that this can be done at home with basic tools, but it’s essential to follow these steps:
- Preparation:
- I made sure to disconnect the battery and gather all necessary tools.
- Accessing the Gear:
- For the 700R4, I had to remove the speedometer cable and then the gear housing to replace the gear.
- Installation:
- I carefully installed the new gear, ensuring it seated properly. I reconnected everything and tested my speedometer before taking it for a spin.
Conclusion
In my experience, selecting the right speedometer gear for my 700R4 transmission made a significant difference in my driving experience. By understanding the types of gears, considering compatibility, and following a straightforward installation process, I was able to achieve accurate speed readings. I hope this guide helps you in your journey to find the perfect speedometer gear for your vehicle!
Author Profile

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Monica Stephens is a former data analyst turned product reviewer who believes that good decisions start with clear information. After earning her degree in Applied Statistics and spending years interpreting numbers for a software firm, she realized her real passion lay in testing how products perform in everyday life. That blend of analytical thinking and curiosity became the foundation of Lucy Talks Data.
Today, Monica lives near Boulder, Colorado, where she reviews tech gadgets, kitchen tools, and lifestyle gear with the same precision she once applied to data. Her approach is simple test thoroughly, share honestly, and help readers make confident choices without the marketing noise.
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