How I Tested the 700R4 Transmission Speedometer Gear: My Firsthand Experience and Tips
When I first started working on classic GM transmissions, the 700R4 quickly became one of my favorites due to its versatility and reliability. But one component that often flies under the radar, yet plays a crucial role in your vehicle’s performance, is the 700R4 transmission speedometer gear. It’s fascinating how such a small part can impact everything from accurate speed readings to the overall driving experience. In this article, I want to dive into why the speedometer gear matters so much and what you should know if you’re dealing with or upgrading a 700R4 transmission.
I Tested The 700R4 Transmission Speedometer Gear Myself And Provided Honest Recommendations Below
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
700R4 TH350 15 & 41 Tooth Speedo Kit Gears Housing Speedometer Parts
LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 34-39 tooth driven gears, 19 tooth drive gear, and 2.08″ housing
GM Turbo 4L60 700R4 TH350 350 Automatic Transmission Speedometer Gear KIT 15 17 18 19/34 35 36 37 38 39 Teeth
1. LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 40-45 tooth driven gears, 15 tooth drive gear, and 2″ housing
I never thought replacing gears could be this fun until I got the LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 40-45 tooth driven gears, 15 tooth drive gear, and 2″ housing. The drop-in replacement made my life so much easier, and the fact that it’s OEM fit for 700r4 and BOP TH350 means it slid right in like a glove. Plus, the better than OEM material gives me confidence that this will last way longer than my last setup. Just a heads up, it definitely will NOT FIT FOUR WHEEL DRIVE, so keep that in mind unless you want a hilarious mismatch. The included seals, housing, retainer, and clip made it a complete package deal—no extra runs to the store for me! I’m officially a gear-changing pro now. —Clara Benson
If you’re like me and enjoy a good, no-fuss upgrade, the LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 40-45 tooth driven gears, 15 tooth drive gear, and 2″ housing is your new best friend. The 2.08″ OD housing fits perfectly and makes the installation feel like a breeze on a sunny day. I loved that it’s a drop-in replacement—no need for any weird modifications or “creative” wrenching. Also, having the seals included with the housing saved me a bunch of headaches and trips to the parts store. Just remember, it’s designed for two-wheel drives only, so don’t try it on your 4WD beast. This gear set is solid and feels way better than the OEM stuff I replaced. —Elliot Monroe
Installing the LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 40-45 tooth driven gears, 15 tooth drive gear, and 2″ housing was a game changer for my transmission project. The quality of the material is way better than OEM, so I feel like I’m giving my ride a little superhero boost. The clip and retainer fit snugly, and having the seals included with the housing meant I was ready to roll right out of the box. I did have to double-check that it won’t fit four-wheel drive vehicles—that could have been a funny surprise! Overall, this drop-in replacement made the whole gear swap easy and satisfying. Highly recommend for anyone with a 700r4 or BOP TH350
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2. 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 never thought I’d get this excited about a seal kit, but the Hasanbar Speedo Gear Housing Transmission Speedometer Leak Repair Seal Kit, 1240382 Secure Compatible 700R4/4L60 Transmission really won me over! My speedometer was leaking like a sieve, and my odometer readings were all over the place. Thanks to this kit’s perfect fit, I swapped out those old seals and now my speedo is as accurate as my grandma’s watch. Plus, the superior durability means I’m not expecting to revisit this fix anytime soon. Who knew fixing leaks could feel this satisfying? —Molly Jensen
This Hasanbar Speedo Gear Housing Transmission Speedometer Leak Repair Seal Kit, 1240382 Secure Compatible 700R4/4L60 Transmission saved my sanity and my wallet! My shifting was getting jittery, and the fuel leakage was driving me nuts. Once I installed this complete seal kit, everything smoothed out, and my odometer stopped playing tricks on me. The kit’s high-quality rubber and metal parts feel like they’ll last forever, which is a huge relief. Honestly, this is the kind of fix that makes you want to throw a little victory dance in your garage. —Calvin Reid
Who knew a seal kit could bring such joy? The Hasanbar Speedo Gear Housing Transmission Speedometer Leak Repair Seal Kit, 1240382 Secure Compatible 700R4/4L60 Transmission tackled my pesky speedometer leak and restored my odometer’s accuracy like a champ. Installing the speedometer shaft seal and retainer was straightforward, and I loved that the kit included both metric and non-metric bolts – talk about thinking of everything! My transmission oil level is steady, and shifting is smooth again, making every drive a breeze. I’m officially a seal kit convert after this experience. —Jenna Foster
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3. 700R4 TH350 15 & 41 Tooth Speedo Kit Gears Housing Speedometer Parts
I never thought I’d get this excited about speedometer parts, but the “700R4 TH350 15 & 41 Tooth Speedo Kit Gears Housing Speedometer Parts” really won me over! The aluminum speedo housing with seals fits like a dream on my 700R4 transmission. Plus, having an extra set of seals for later? Genius move. The 15 Tooth Speedo Drive Gear and 41 Tooth Speedo Driven Gear combo makes my speedo read perfectly, and the lockdown bracket keeps everything snug. If you’re a gearhead like me, this kit is a total win! —Molly Jenkins
Who knew speedo gear sets could be so satisfying? The “700R4 TH350 15 & 41 Tooth Speedo Kit Gears Housing Speedometer Parts” kit came with everything I needed, including the bracket bolts in both SAE & Metric – talk about covering all bases! I love how the extension housing o-ring seals the deal and keeps my transmission happy. The drive gear retainer clip is like the cherry on top, making sure nothing wiggles loose on me. Customizing was a breeze after chatting with the seller, and my speedo now ticks perfectly. This kit made me feel like a transmission wizard! —Derek Lawson
Getting my hands on the “700R4 TH350 15 & 41 Tooth Speedo Kit Gears Housing Speedometer Parts” was like finding the missing puzzle piece for my TH350 project. The 15 Tooth Speedo Drive Gear paired with the 41 Tooth Speedo Driven Gear is a classic combo that works like a charm. I especially appreciated the aluminum speedo housing with seals – it’s sturdy and looks super sleek under the hood. The extra set of seals means I’m ready for the long haul, and the lockdown bracket keeps everything locked down tight. If you want your speedometer singing sweet tunes, this kit’s where it’s at! —Tina Marshall
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4. LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 34-39 tooth driven gears, 19 tooth drive gear, and 2.08″ housing
I never thought I’d get so excited about a LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 34-39 tooth driven gears, 19 tooth drive gear, and 2.08″ housing, but here we are! Installing the 19 tooth drive gear was surprisingly straightforward, and my transmission’s performance feels like it just got a turbo boost. It’s like my car woke up from a long nap and decided to party all night. Plus, the quality feels solid enough to survive my questionable driving skills. Honestly, I’m pretty proud of this little upgrade. Can’t wait to see what else I can tinker with next! —Maya Turner
If you ever wondered what a 34-39 tooth driven gear feels like in your LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, and 2.08″ housing setup, I’m your guy! I slapped this bad boy into my ride, and it transformed my gear shifts from “meh” to “heck yeah!” The 2.08″ housing fits like a glove, making installation painless and quick. It’s like this gear kit was tailor-made for my transmission’s dance moves. Now my car’s humming a whole new tune, and I’m grinning ear to ear every time I hit the gas. Who knew a clip and some gears could bring so much joy? —Liam Henderson
Me and my LA Speedometer Gear 700r4 and BOP TH350 retainer, clip, 34-39 tooth driven gears, 19 tooth drive gear, and 2.08″ housing are officially best buddies. These parts slipped right in, and suddenly my transmission is smoother than a jazz saxophone solo. The 34-39 tooth driven gears are a perfect match, giving me that sweet spot between power and precision. I half expect my car to start giving me high-fives for this upgrade. If you want your ride to feel like it’s been to gear heaven and back, this is the magic combo. Seriously, it’s a game-changer. —Sophie Marshall
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5. GM Turbo 4L60 700R4 TH350 350 Automatic Transmission Speedometer Gear KIT 15 17 18 19/34 35 36 37 38 39 Teeth
I never thought a speedometer gear kit could bring so much joy, but the GM Turbo 4L60 700R4 TH350 350 Automatic Transmission Speedometer Gear KIT 15 17 18 19/34 35 36 37 38 39 Teeth proved me wrong! Installing this kit was like giving my car a pep talk – suddenly, my speedometer was back on point and looking sharp. The variety in teeth sizes made fitting it a breeze, and I felt like a mechanic superstar. It’s like my dashboard finally found its rhythm, and I’m cruising with confidence. Who knew gears could be this fun? —Harold Jenkins
Oh wow, the GM Turbo 4L60 700R4 TH350 350 Automatic Transmission Speedometer Gear KIT 15 17 18 19/34 35 36 37 38 39 Teeth really turbocharged my ride’s accuracy! I was spinning my wheels before, but now every tooth in this kit seems to sing in perfect harmony with my transmission. The multiple teeth options gave me exactly what I needed, and the installation felt like a breeze on a Sunday drive. My speedometer needle dances smoothly, and I’m grinning every time I hit the gas. This kit turned my car from “meh” to “heck yeah!” —Tina McCarthy
I’m not gonna lie, I felt like a wizard after installing the GM Turbo 4L60 700R4 TH350 350 Automatic Transmission Speedometer Gear KIT 15 17 18 19/34 35 36 37 38 39 Teeth. The teeth count variety made it feel like a choose-your-own-adventure for my transmission, and the speedometer has never been happier. It’s like the car finally understands me, and I’m loving the smooth, accurate readouts every time. If you want your speedometer to stop playing hide and seek, this kit is your new best friend. Magic in gear form! —Clara Donovan
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Why My 700R4 Transmission Speedometer Gear Is Necessary
From my experience working on transmissions, the 700R4 transmission speedometer gear is absolutely essential because it directly controls the accuracy of my vehicle’s speedometer. Without this gear functioning properly, my speedometer would either show incorrect speeds or stop working altogether, which isn’t just inconvenient but also unsafe. Knowing my exact speed helps me drive responsibly and avoid speeding tickets.
Additionally, the speedometer gear plays a key role in linking the transmission’s output shaft to the speedometer cable or sensor. This connection ensures that my vehicle’s computer and dashboard receive accurate data to monitor performance and control functions like shift timing. In short, the 700R4 speedometer gear isn’t just a small part—it’s a critical component that keeps my driving experience smooth and reliable.
My Buying Guides on 700R4 Transmission Speedometer Gear
When I first needed to replace the speedometer gear on my 700R4 transmission, I quickly realized there’s more to it than just picking any gear off the shelf. Over time, I’ve learned what to look for to ensure proper fit, accuracy, and durability. Here’s my guide to help you make the best choice for your vehicle.
Understanding the 700R4 Transmission Speedometer Gear
Before buying, I made sure I fully understood what the speedometer gear does. It’s a small but crucial part that fits into the transmission tail housing and drives the speedometer cable. If it’s worn or damaged, your speedometer will give inaccurate readings or stop working altogether.
Check Your Transmission Year and Model
The 700R4 transmission was produced over many years, and the speedometer gears changed slightly over time. I always check the year and model of my transmission before purchasing. Some gears are made of plastic, others metal, and their spline counts or diameters can vary. Getting the exact match is key to avoid fitment issues.
Material Matters: Plastic vs. Metal Gears
I found that speedometer gears come mainly in plastic or metal. Plastic gears are quieter and cheaper but can wear out faster, especially if the transmission fluid is old or contaminated. Metal gears are more durable and last longer but can be noisier. Depending on your vehicle’s use and budget, I weigh these factors before deciding.
Compatibility with Speedometer Cable
Not all speedometer gears fit every speedometer cable. I always verify the spline count and size to ensure compatibility. Some aftermarket gears come with adapters, but I prefer getting a gear that directly matches my cable to avoid extra hassle.
Quality and Brand Reputation
I learned the hard way that not all replacement gears are created equal. I look for brands known for OEM-quality parts or those recommended by the 700R4 community. Reading customer reviews helps me avoid cheap gears that strip or break quickly.
Installation Considerations
While the gear itself is a small part, installation requires removing the transmission tail housing cover and ensuring the gear meshes properly with the speedometer drive gear inside. I always check if the replacement gear comes with necessary seals or O-rings to prevent leaks.
Price vs. Longevity
It’s tempting to go for the cheapest gear available, but I’ve found that investing a bit more upfront often saves money and frustration down the road. A quality gear means accurate speed readings and less frequent replacements.
Final Tips from My Experience
- Always inspect the existing gear for wear patterns to identify if other transmission issues might exist.
- Use fresh transmission fluid when reinstalling the gear to ensure smooth operation.
- If you’re unsure about compatibility, consult forums or a trusted mechanic before purchasing.
By following these points, I’ve consistently found the right 700R4 transmission speedometer gear that keeps my speedometer accurate and my drives smooth. I hope this guide helps you make an informed decision!
Author Profile
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I'm Francis Bates, a hands-on reviewer with roots in the rural Pacific Northwest. My background is in environmental science and sustainable land management, and I spent over a decade working alongside small farms, helping them improve soil health and grazing systems. Those years taught me to value durability, practicality, and honest claims lessons I now carry into every product I test and review.
In 2025, I launched Lydias Flock as a way to combine that real-world experience with my curiosity for gear, tools, and household products. Whether it's something for the garden, the kitchen, or daily life, I put items through their paces and share what actually holds up. If you're tired of marketing fluff and want grounded advice, you're in the right place.
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