--- product_id: 548107639 title: "INJORA 40.3:1 Stainless Steel Transmission Gear Set for TRX4M" brand: "injora" price: "¥7045" currency: JPY in_stock: true reviews_count: 5 url: https://www.desertcart.jp/products/548107639-injora-40-3-1-stainless-steel-transmission-gear-set-trx4m store_origin: JP region: Japan --- # CNC machined stainless steel 40.3:1 ultra-low gear ratio Rust & wear resistant durability INJORA 40.3:1 Stainless Steel Transmission Gear Set for TRX4M **Brand:** injora **Price:** ¥7045 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate your RC game with unstoppable torque and precision engineering! ## Quick Answers - **What is this?** INJORA 40.3:1 Stainless Steel Transmission Gear Set for TRX4M by injora - **How much does it cost?** ¥7045 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/548107639-injora-40-3-1-stainless-steel-transmission-gear-set-trx4m) ## Best For - injora enthusiasts ## Why This Product - Trusted injora brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision CNC Machined:** Experience flawless gear meshing and enhanced strength thanks to premium CNC machining. - • **Rock-Climbing Powerhouse:** Unleash unstoppable torque with the ultra-low 40.3:1 reduction ratio, perfect for conquering the toughest trails. - • **Complete Gear Set Included:** All transmission gears plus an 11-tooth motor pinion—everything you need for a seamless TRX4M upgrade. - • **Effortless Upgrade for TRX4M:** Designed specifically for Defender, Bronco, K10 High Trail, and F150 1/18 crawlers—no assembly hassle, just pure performance. - • **Rust-Resistant Stainless Steel:** Built to last with corrosion-resistant materials that keep your transmission running smooth season after season. ## Overview The INJORA 40.3:1 Stainless Steel Transmission Gear Set is a premium upgrade for TRX4M 1/18 scale crawler vehicles, featuring CNC machined stainless steel gears for superior strength and rust resistance. With an ultra-low 40.3:1 gear ratio, it delivers maximum torque and rock-climbing capability. This complete set includes all necessary transmission gears and an 11-tooth motor pinion, designed for easy installation and long-lasting performance. ## Features - CNC machined, durable and greater strength, long service life. - Stainless steel materials, with excellent rust resistant,enhance wear resistance. - Includes all transmission gears and a 11-tooth motor pinion. - Ultra-low 40.3:1 reduction ratio for maximum rock-climbing power and unstoppable torque. - Low range transmission gear set for TRX4M Defender, Bronco, K10 High Trail, F150 1/18 crawler car upgrade. - Note: Don't forget to grease the gears!!! - AGE RECOMMENDATION: Not for children under 14 years. ## Technical Specifications | Specification | Value | |---------------|-------| | Age Range Description | Unisex Adult | | Asin | B0C1CTWH9X | | Best Sellers Rank | #171,598 in Toys (See Top 100 in Toys) #31 in RC Vehicle Transmission Gears | | Brand Name | INJORA | | Color | Silver | | Customer Reviews | 4.8 4.8 out of 5 stars (681) 4.8 out of 5 stars | | Educational Objective | Develop problem-solving skills through convenient assembly and operation of mechanical systems. | | Included Components | Gear | | Indoor Outdoor Usage | Outdoor | | Is Assembly Required | No | | Item Dimensions | 10 x 7 x 2 centimeters | | Item Type Name | RC Gear | | Manufacturer | INJORA | | Manufacturer Part Number | 4M-36 | | Manufacturer Recommended Age | 14 - 14 years | | Material Type | Stainless Steel | | Model Number | 4M-36 | | Number Of Packs | 1 | | Number Of Players | 1 | | Operation Mode | Automatic | | Power Source | Battery | | Set Name | 1 Set | | Size | 40.3:1 | | Subject Character | RC Gear | | Supported Battery Types | No batteries required | | Theme | RC | ## Images ![INJORA 40.3:1 Stainless Steel Transmission Gear Set for TRX4M - Image 1](https://m.media-amazon.com/images/I/51kWABhvhtL.jpg) ![INJORA 40.3:1 Stainless Steel Transmission Gear Set for TRX4M - Image 2](https://m.media-amazon.com/images/I/61yOZ9RG+EL.jpg) ![INJORA 40.3:1 Stainless Steel Transmission Gear Set for TRX4M - Image 3](https://m.media-amazon.com/images/I/61FIdQdtQaL.jpg) ![INJORA 40.3:1 Stainless Steel Transmission Gear Set for TRX4M - Image 4](https://m.media-amazon.com/images/I/613O76pU5sL.jpg) ![INJORA 40.3:1 Stainless Steel Transmission Gear Set for TRX4M - Image 5](https://m.media-amazon.com/images/I/61TknF8eCAL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 2 years in, still recommend. *by on Reviewed in the United States 26 April 2023* TL;DR Only one run, so far so good. Running brushless Furitek.Update March 2025. Almost 2 years on these gears and still working great. Still highly recommend this if you want to rock crawl. Too slow for trail or general purpose driving, but a must have if you’re looking for more torque and slow speed crawling. I’ve had no issues out of these gears (or anything on my 4M for that matter)Update: April 2024, 1 year later still runs like the day I installed. I don’t drive it every day but at least a couple times per week. Would buy again.Original review:Installed in my Bronco running bearing kit and the Furitek brushless motor/esc. Gears dropped right in no fitment issues. There has been a clicking ever since installing the new motor but the plastic crawler gears from Traxxas also made a clicking. So I just run it. Worth noting though. These gears appear to be nicely machined. If you’re into rock crawling with your TRX4m, I’d suggest this as your first upgrade along with bearings second. Those two upgrades even on the stock motor and electronics make it a whole new truck. The torque of the stock motor is actually pretty good with the crawl gears. I bought these injora gears because I thought that I had stripped the plastic ones causing them to click when driving, turns out these click too. The quality of injora parts is excellent. I’m also running their brass differential covers front and rear. So far these are a 5 star all day. If anything happens, I’ll update my review. ### ⭐⭐⭐⭐ Fait le taf *by on Reviewed in France 19 March 2025* Très bonne compatibilité. Mais le trx-4m est devenu beaucoup plus bruyant. C'est dommage. ### ⭐⭐⭐⭐⭐ Good *by on Reviewed in the United Kingdom 18 May 2025* Perfect thanks ## Frequently Bought Together - INJORA 15g Stainless Steel 40.3:1 Low Range Transmission Gear Set for TRX4M 1/18 RC Crawler Car Upgrade - INJORA Steel Sealed Bearing Kit for TRX4M 1/18 RC Crawler Upgrade Parts, 22PCS - INJORA Drive Shaft Steel Black Front Rear Center Shaft with D Shaped Hole for TRX4M Defender Bronco 1/18 RC Crawler Upgrade, 22g/Set --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/548107639-injora-40-3-1-stainless-steel-transmission-gear-set-trx4m](https://www.desertcart.jp/products/548107639-injora-40-3-1-stainless-steel-transmission-gear-set-trx4m) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-12*