--- product_id: 548107639 title: "INJORA Stainless Steel 40.3:1 Transmission Gear Set for TRX4M 1/18" brand: "injora" price: "$45.23" currency: USD in_stock: true reviews_count: 5 category: "Injora" url: https://www.desertcart.us/products/548107639-injora-stainless-steel-40-3-1-transmission-gear-set-trx4m store_origin: US region: United States of America --- # CNC machined precision Ultra-low 40.3:1 torque ratio Stainless steel rust-resistant INJORA Stainless Steel 40.3:1 Transmission Gear Set for TRX4M 1/18 **Brand:** injora **Price:** $45.23 **Availability:** ✅ In Stock ## Summary > ⛰️ Elevate your TRX4M game with torque that never quits! ## Quick Answers - **What is this?** INJORA Stainless Steel 40.3:1 Transmission Gear Set for TRX4M 1/18 by injora - **How much does it cost?** $45.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/548107639-injora-stainless-steel-40-3-1-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 - • **Plug & Play Upgrade:** Direct fit for TRX4M 1/18 RC crawler—no hassle, just instant performance boost. - • **Torque That Conquers:** Ultra-low 40.3:1 gear ratio delivers unstoppable crawling power for the toughest terrains. - • **Rock-Solid Durability:** Crafted from premium stainless steel for unbeatable wear resistance and long-lasting performance. - • **Trusted by Enthusiasts:** Proven reliability with 2+ years of rave reviews from serious rock crawlers. - • **Precision CNC Machining:** Engineered with exacting CNC processes ensuring flawless fit and smooth operation every time. ## Overview The INJORA Stainless Steel 40.3:1 Transmission Gear Set is a precision CNC-machined upgrade designed specifically for the TRX4M 1/18 RC crawler. Made from rust-resistant stainless steel, it offers exceptional durability and wear resistance. Featuring an ultra-low 40.3:1 reduction ratio, this gear set maximizes torque and crawling power, making it the go-to choice for serious rock crawling enthusiasts seeking reliable, long-lasting performance. ## Description Product description Review: 2 years in, still recommend. - 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. Review: Fait le taf - Très bonne compatibilité. Mais le trx-4m est devenu beaucoup plus bruyant. C'est dommage. ## Features - CNC machined, durable and greater strength, long service life. - Stainless steel materials, with excellent rust resistant,enhance wear resistance. - Includes alStainless Steell transmission gears and a 11-tooth motor pinion. - Ultra-low 40.3:1 reduction ratio for maximum rock-climbing power and unstoppable torque. - Suit for TRX4M 1/18 RC Crawler Car Upgrade. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0C1CTWH9X | | Age Range Description | Unisex Adult | | Best Sellers Rank | #155,546 in Toys ( See Top 100 in Toys ) #41 in RC Vehicle Transmission Gears | | Brand Name | INJORA | | Color | Silver | | Customer Reviews | 4.8 out of 5 stars 645 Reviews | | 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 Maximum Age (MONTHS) | 168 | | Manufacturer Minimum Age (MONTHS) | 168.00 | | Manufacturer Part Number | 4M-36 | | Material Type | Stainless Steel | | Model Number | 4M-36 | | 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 Stainless Steel 40.3:1 Transmission Gear Set for TRX4M 1/18 - Image 1](https://m.media-amazon.com/images/I/51kWABhvhtL.jpg) ![INJORA Stainless Steel 40.3:1 Transmission Gear Set for TRX4M 1/18 - Image 2](https://m.media-amazon.com/images/I/61yOZ9RG+EL.jpg) ![INJORA Stainless Steel 40.3:1 Transmission Gear Set for TRX4M 1/18 - Image 3](https://m.media-amazon.com/images/I/61FIdQdtQaL.jpg) ![INJORA Stainless Steel 40.3:1 Transmission Gear Set for TRX4M 1/18 - Image 4](https://m.media-amazon.com/images/I/613O76pU5sL.jpg) ![INJORA Stainless Steel 40.3:1 Transmission Gear Set for TRX4M 1/18 - Image 5](https://m.media-amazon.com/images/I/61TknF8eCAL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 2 years in, still recommend. *by 7***S on 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 G***J on 19 March 2025* Très bonne compatibilité. Mais le trx-4m est devenu beaucoup plus bruyant. C'est dommage. ### ⭐⭐⭐⭐⭐ Good *by G***❤ on 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.us/products/548107639-injora-stainless-steel-40-3-1-transmission-gear-set-trx4m](https://www.desertcart.us/products/548107639-injora-stainless-steel-40-3-1-transmission-gear-set-trx4m) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-10*