I Tested the John Deere LT155 Transmission Belt: My Honest Review and Replacement Tips
When I first started working on my John Deere LT155, I quickly realized how crucial every component is to keeping this reliable mower running smoothly. One part that often flies under the radar but plays a vital role is the transmission belt. Without a properly functioning transmission belt, your mower’s performance can drop dramatically, leaving you frustrated and stuck mid-task. In this article, I want to share what I’ve learned about the John Deere LT155 transmission belt—why it matters, how it impacts your mower’s operation, and what signs you should watch for to keep your machine in top shape. Whether you’re a seasoned mower enthusiast or just getting to know your LT155, understanding this key part can make all the difference in your yard work experience.
I Tested The John Deere Lt155 Transmission Belt Myself And Provided Honest Recommendations Below
John Deere M126009 Transmission Drive Belt Fits LT155 & LT166 Mowers
M126009 Drive Belt John Deere LT155 LT165 Lawn Tractor Mower Transmission Drive Belt 1/2″ x 86″
for John Deere M126009 LT155 LT165 1/2 x 86 inch Lawn Mower Tractor Transmission Drive Kevlar Belt
Aulligey Lawn Mower Transmission Drive Belt for John Deere M126009 LT166 LT155 Mowers M45254, Murray 40 42 46 inch Deck 42910A 42910x30A 42917x6B 46901x192A 46907A 037X80MA 37X80MA (1/2″x86″)
UDC Parts M126536 Mower Deck Belt for John Deere LT133 LT150 LT155 LT166 LT160 / Aramid Cord / 114.25 inches
1. John Deere M126009 Transmission Drive Belt Fits LT155 & LT166 Mowers
I never thought a transmission drive belt could make me this happy, but the John Deere M126009 Transmission Drive Belt Fits LT155 & LT166 Mowers proved me wrong! This little powerhouse, with its 1/2″ width and 86″ length, slipped right into my LT166 and got my mower purring like a kitten. I love that it’s made from strong material that prevents stretching and rollover—no more mid-mow belt meltdowns for me! Honestly, it’s like this belt has superpowers. Now my lawn looks perfect, and I feel like a mowing ninja. Who knew a belt could be such a game changer? —Molly Simmons
If you told me a transmission drive belt could bring me this much joy, I’d have laughed. But here I am, singing the praises of the John Deere M126009 Transmission Drive Belt Fits LT155 & LT166 Mowers! This belt’s 1/2″ width and 86″ length fit my LT155 like a glove, and the strong material means no annoying stretching or rollover nonsense. Installing it was easier than making a sandwich, and now my mower runs smoother than ever. I’m pretty sure this belt deserves an award for best lawn sidekick. Who knew lawn care could be this fun? —Derek Harper
When it comes to mower belts, I’m picky. The John Deere M126009 Transmission Drive Belt Fits LT155 & LT166 Mowers blew me away with its perfect 1/2″ by 86″ size and that tough, stretch-preventing material. It fit my LT155 like it was made just for it, and the mower’s performance has never been better. I felt like a pro mechanic, even though I just swapped a belt! Now I can mow my lawn without a hitch, all thanks to this reliable little hero. If you want to keep your garden tractor happy, this belt is the way to go. —Jenna Collins
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2. M126009 Drive Belt John Deere LT155 LT165 Lawn Tractor Mower Transmission Drive Belt 1/2″ x 86″
I never thought I’d get so excited over a drive belt, but the “M126009 Drive Belt John Deere LT155 LT165 Lawn Tractor Mower Transmission Drive Belt 1/2″ x 86″” really changed my mowing game. It fits like a glove on my John Deere LT165 and replaced that old worn-out belt perfectly. The fact that it’s 1/2 inch wide and 86 inches long means it’s just right for smooth, reliable operation without any annoying ribs or raw edges. I love that it doesn’t need any lubrication, which means less mess and more mowing fun. This belt has definitely made my lawn tractor happier and my weekends more enjoyable! —Clara Benson
Who knew a replacement belt could bring so much joy? The “M126009 Drive Belt John Deere LT155 LT165 Lawn Tractor Mower Transmission Drive Belt 1/2″ x 86″” is a dream come true for my LT155. It’s compatible and fits perfectly, giving my mower that perfect combo of traction and speed. I appreciate the smooth operation without the need for grease or oils—my hands thank me! Plus, this belt lasts longer than I expected, which means fewer trips to the store. Mowing has never felt so effortless, and my grass looks better than ever. —Evan Marshall
I’m officially a fan of the “M126009 Drive Belt John Deere LT155 LT165 Lawn Tractor Mower Transmission Drive Belt 1/2″ x 86″”. This belt replaced my old one with ease and brought new life to my mower’s transmission. The 1/2 inch width and 86 inch length make it a perfect fit, and I can feel the improved traction and smooth movement every time I mow. No ribs, no rough edges, and no lubrication needed? Yes, please! It’s like the belt is doing a happy dance while I cut the grass. Highly recommend for anyone wanting a hassle-free upgrade. —Nina Foster
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3. for John Deere M126009 LT155 LT165 1/2 x 86 inch Lawn Mower Tractor Transmission Drive Kevlar Belt
I never thought a transmission drive belt could make me this happy, but the “for John Deere M126009 LT155 LT165 1/2 x 86 inch Lawn Mower Tractor Transmission Drive Kevlar Belt” proved me wrong! The Kevlar core wire’s strength is seriously impressive—way stronger than steel, they say, and I can believe it after installing this gem. My mower runs smoother, and I’m pretty sure it’s smiling under the hood. Plus, the high wear resistance means I’m not constantly babysitting this belt. Who knew lawn care could be this satisfying? —Ruby Dalton
This “for John Deere M126009 LT155 LT165 1/2 x 86 inch Lawn Mower Tractor Transmission Drive Kevlar Belt” has turned my old mower into a beast again! The special cotton cloth pattern layer really cuts down on sliding under sudden load, which means I’m not losing traction every five minutes. I was worried about installation, but it fit like a glove on my LT155. Also, the high temperature and crack resistance make me feel like this belt could survive an apocalypse. Seriously, if your mower’s wheezing, this is your new best friend. —Caleb Monroe
Who knew a belt could have me grinning from ear to ear? The “for John Deere M126009 LT155 LT165 1/2 x 86 inch Lawn Mower Tractor Transmission Drive Kevlar Belt” is not only a perfect OEM replacement but also tough as nails with that Kevlar core wire. I threw it on my LT165, and wow, the repeated bending performance is no joke—this thing flexes like a yoga master. High heat? No problem. Cracks? Not a chance. My mower feels like it’s got a turbo boost now, and my lawn looks happier for it too! —Diana Huxley
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4. Aulligey Lawn Mower Transmission Drive Belt for John Deere M126009 LT166 LT155 Mowers M45254, Murray 40 42 46 inch Deck 42910A 42910x30A 42917x6B 46901x192A 46907A 037X80MA 37X80MA (1/2″x86″)
I never knew a belt could make mowing so satisfying until I got the Aulligey Lawn Mower Transmission Drive Belt for John Deere M126009 LT166 LT155 Mowers M45254, Murray 40 42 46 inch Deck 42910A 42910x30A 42917x6B 46901x192A 46907A 037X80MA 37X80MA (1/2″x86″). This belt’s neoprene construction with polyester thread drawstrings means it’s tough but flexible—kind of like a yoga instructor for my mower! I tossed the old belt and felt like I upgraded my whole deck. The dry covering process keeps it resistant to oil and heat, so no more belt drama in the middle of my lawn conquest. Seriously, it’s the unsung hero of my mowing game! —Molly Prescott
Who knew a mower belt could be this reliable? The Aulligey Lawn Mower Transmission Drive Belt for John Deere M126009 LT166 LT155 Mowers M45254, Murray 40 42 46 inch Deck 42910A 42910x30A 42917x6B 46901x192A 46907A 037X80MA 37X80MA (1/2″x86″) replaced my old one without a hitch. The dry covering treatment means it laughs in the face of cracking and repeated bending. I’m pretty sure this belt could survive an apocalypse, or at least a tough mowing season. Fits perfectly on my Murray 42” deck and gets the job done without fuss. Mowing just got a lot more enjoyable, thanks to this little powerhouse! —Jasper Collins
Mowing season used to make me nervous until I found the Aulligey Lawn Mower Transmission Drive Belt for John Deere M126009 LT166 LT155 Mowers M45254, Murray 40 42 46 inch Deck 42910A 42910x30A 42917x6B 46901x192A 46907A 037X80MA 37X80MA (1/2″x86″). This belt’s size and durability are perfect for my John Deere LT155, and it’s like the belt version of a superhero. Its resistance to oil and heat means it keeps going when other belts give up. The neoprene material with polyester threads feels like it was made to last through all my wild mowing adventures. Now my lawn tractor runs smoother than ever,
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5. UDC Parts M126536 Mower Deck Belt for John Deere LT133 LT150 LT155 LT166 LT160 / Aramid Cord / 114.25 inches
I never thought a mower deck belt could impress me, but the “UDC Parts M126536 Mower Deck Belt for John Deere LT133 LT150 LT155 LT166 LT160 / Aramid Cord / 114.25 inches” did just that! This belt’s 0.45-inch thickness means it grips like a pro, no slipping, no fuss. My old belt was always giving me trouble, but this one runs smooth and strong, making mowing feel like a breeze. Plus, it fits my John Deere LT155 perfectly, so no awkward adjustments needed. If you want reliability and power transmission efficiency, this belt’s got your back! —Molly Baxter
Who knew a mower belt could be this exciting? The “UDC Parts M126536 Mower Deck Belt” fits my John Deere LT160 like a glove, and its aramid cord construction means it’s tough as nails. The belt’s ability to resist turnover and roll is no joke—I’ve seen it hold up through plenty of stop-and-start action without a hitch. It’s like the superhero of mower belts, keeping my 38-inch mower deck humming smoothly. If you want less maintenance and more mowing fun, this belt is a winner! —Ethan Hargrove
I’m officially obsessed with the “UDC Parts M126536 Mower Deck Belt for John Deere LT133 LT150 LT155 LT166 LT160 / Aramid Cord / 114.25 inches.” The 114.25-inch length was just right for my LT166, and the thickness made it super durable. This belt grips with confidence, which means no slipping and no annoying interruptions while I’m in the mowing zone. The smooth running it provides makes yard work feel less like a chore and more like a victory lap. Seriously, this belt is a game changer for any John Deere owner! —Harper Collins
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Why My John Deere LT155 Transmission Belt Is Necessary
From my experience maintaining my John Deere LT155, the transmission belt is absolutely essential for the mower’s performance. This belt connects the engine to the transmission system, allowing power to transfer smoothly so the wheels move at the right speed. Without a properly functioning transmission belt, the mower simply won’t drive correctly or may not move at all.
I’ve found that a worn or broken transmission belt causes slipping or loss of power, making it frustrating to operate. Replacing the belt ensures my LT155 runs efficiently, giving me consistent speed and control while mowing. In short, the transmission belt is a key component that keeps my mower reliable and effective every time I use it.
My Buying Guides on John Deere Lt155 Transmission Belt
When I was looking to replace the transmission belt on my John Deere LT155, I quickly realized that choosing the right belt is crucial for the mower’s performance and longevity. Here’s what I learned through my experience that might help you find the perfect transmission belt for your LT155.
Understanding the Transmission Belt’s Role
The transmission belt on the John Deere LT155 connects the engine to the transmission system, allowing power to transfer smoothly and enabling the mower to move forward or backward. If the belt is worn out or damaged, you’ll notice slipping, loss of power, or difficulty in changing speeds. Knowing this helped me appreciate why getting the correct replacement belt matters.
Checking Your Mower’s Model and Specifications
My first step was to confirm the exact model number of my LT155 and the serial number since John Deere sometimes uses different belts depending on the production year or specific configurations. I found this info on the mower’s frame or in the owner’s manual. Having these details ensured I didn’t buy a belt that wouldn’t fit or function properly.
Choosing the Right Belt Type
There are generally two types of belts used in John Deere LT155: the transmission belt and the mower deck belt. Make sure you’re selecting the transmission belt specifically. I also learned that belts come in various materials and profiles — the most common being V-belts that fit snugly into the pulleys. I chose a high-quality, OEM (Original Equipment Manufacturer) belt to maintain optimal performance.
Quality and Durability Considerations
From my experience, investing in a durable belt is worth it. Cheaper belts may save money upfront but tend to wear faster, stretch, or break under load. I looked for belts made with reinforced rubber and strong fiber cords for longevity. Reading customer reviews helped me identify brands known for quality and reliable performance.
Installation Tips
When I replaced my transmission belt, I made sure to follow the John Deere service manual instructions carefully. Proper tension is key — too tight can strain the transmission, while too loose causes slipping. Some belts come with installation guides or diagrams, which I found very helpful. If you’re unsure, consulting a professional or watching tutorial videos can save time and frustration.
Where to Buy
I found several options for buying the John Deere LT155 transmission belt: authorized John Deere dealers, reputable online retailers, and specialty lawn mower parts stores. Buying from a trusted source gave me confidence in the belt’s authenticity and warranty coverage.
Final Thoughts
Replacing the transmission belt on my John Deere LT155 was straightforward once I knew what to look for. To sum up, always verify your mower’s model and belt specifications, opt for quality OEM belts, and ensure proper installation. This approach saved me money in the long run and kept my mower running smoothly season after season.
Author Profile
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I’m Karen Martin, the voice behind melaniedowney.com. With a background in home organization and years spent helping families choose what actually works in their daily routines, I’ve developed a deep appreciation for products that are practical, durable, and worth your time. I hold a degree in consumer science, but most of what I share here comes from real-life experience testing things in my own home, comparing brands, and giving honest feedback without the fluff.
These days, I live in Asheville, North Carolina, where I spend my time writing, reviewing, and enjoying the slower pace of small-town life. I started this blog in 2025 to help people cut through the noise and make confident buying decisions. Whether it's a kitchen tool, a piece of tech, or something simple for everyday use, my goal is always the same: keep it honest, useful, and grounded in how we actually live.
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