---
product_id: 527456810
title: "INJORA 15g Stainless Steel 40.3:1 Low Range Transmission Gear Set for TRX4M 1/18 RC Crawler Car Upgrade"
brand: "injora"
price: "772777₫"
currency: VND
in_stock: true
reviews_count: 13
category: "Injora"
url: https://www.desertcart.vn/products/527456810-injora-15g-stainless-steel-40-3-1-low-range-transmission
store_origin: VN
region: Vietnam
---

# CNC machined stainless steel 40.3:1 ultra-low gear ratio rust & wear resistant durability INJORA 15g Stainless Steel 40.3:1 Low Range Transmission Gear Set for TRX4M 1/18 RC Crawler Car Upgrade

**Brand:** injora
**Price:** 772777₫
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your crawl game—slow it down, power it up, own the trail!

## Quick Answers

- **What is this?** INJORA 15g Stainless Steel 40.3:1 Low Range Transmission Gear Set for TRX4M 1/18 RC Crawler Car Upgrade by injora
- **How much does it cost?** 772777₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/527456810-injora-15g-stainless-steel-40-3-1-low-range-transmission)

## 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-and-Play Upgrade:** Seamlessly fits TRX4M Defender, Bronco, K10 High Trail, and F150 1/18 scale crawlers—no hassle, just enhanced performance.
- • **Premium CNC Machined Steel:** Crafted from high-grade stainless steel for superior strength and longevity that outperforms plastic alternatives.
- • **Rust-Resistant Reliability:** Engineered to resist corrosion and wear, ensuring your upgrade lasts through countless rugged adventures.
- • **Complete Gear Set with Pinion:** Includes all transmission gears plus an 11-tooth motor pinion, so you’re fully equipped to dominate every rock crawl.
- • **Unmatched Rock-Crawling Torque:** Experience unstoppable slow-speed control with a precision 40.3:1 reduction ratio designed for maximum climbing power.

## Overview

The INJORA 15g Stainless Steel 40.3:1 Low Range Transmission Gear Set is a precision CNC-machined upgrade for TRX4M 1/18 scale RC crawlers. Built from rust-resistant stainless steel, it delivers ultra-low gearing for maximum torque and rock-climbing control. This complete set includes all necessary gears and an 11-tooth motor pinion, offering a durable, plug-and-play solution that transforms your crawler’s performance and longevity.

## Description

Buy INJORA 15g Stainless Steel 40.3:1 Low Range Transmission Gear Set for TRX4M 1/18 RC Crawler Car Upgrade: Gears - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

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: Just About Perfect! - It's too bad these are hidden away in a casing as they are beautifully finished and nice to look at. During the installation, I also installed sealed bearings. I am amazed at the crawling abilities these gears create. Along with some other upgrades I made at the same time, my Traxxas 1/18 scale Land Rover Defender climbs over the four obstacles I build in the yard almost like it's flat land. Yes, top end speed is reduced but, so what. I wanted crawling ability and that's exactly what I got! I feel that with the installation of these low range gears a brushless motor is no longer required, although, a brushless motor gives good low speed modulation and a good top end. I'll sacrifice top end for crawling ability and just a $13 price tag.

## 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!!!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C1CTWH9X |
| Age Range Description | Unisex Adult |
| Best Sellers Rank | #25,812 in Toys & Games ( See Top 100 in Toys & Games ) #1 in RC Vehicle Transmission Gears |
| Brand Name | INJORA |
| Color | Silver |
| Customer Reviews | 4.8 4.8 out of 5 stars (534) |
| Educational Objective | Develop problem-solving skills through assembly and understanding of mechanical principles |
| Included Components | Gear |
| Is Assembly Required | No |
| Item Dimensions | 3.94 x 2.76 x 0.79 inches |
| 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 | Manual |
| Power Source | Battery |
| Set Name | Low Range Transmission Gear Set |
| Size | 40.3:1 |
| Subject Character | RC Gear |
| Supported Battery Types | No batteries required |
| Theme | RC |

## Images

![INJORA 15g Stainless Steel 40.3:1 Low Range Transmission Gear Set for TRX4M 1/18 RC Crawler Car Upgrade - Image 1](https://m.media-amazon.com/images/I/51kWABhvhtL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 2 years in, still recommend.
*by D***E on April 26, 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.

### ⭐⭐⭐⭐⭐ Just About Perfect!
*by R***C on March 22, 2026*

It's too bad these are hidden away in a casing as they are beautifully finished and nice to look at. During the installation, I also installed sealed bearings. I am amazed at the crawling abilities these gears create. Along with some other upgrades I made at the same time, my Traxxas 1/18 scale Land Rover Defender climbs over the four obstacles I build in the yard almost like it's flat land. Yes, top end speed is reduced but, so what. I wanted crawling ability and that's exactly what I got! I feel that with the installation of these low range gears a brushless motor is no longer required, although, a brushless motor gives good low speed modulation and a good top end. I'll sacrifice top end for crawling ability and just a $13 price tag.

### ⭐⭐⭐⭐⭐ Slows your rig WAY down
*by M***E on January 9, 2026*

If you want to make your TRX4M a crawler these are what you need. I was so impressed with the slow speed crawl and control I had over the car. I did switch back to the stock ones because I use my rc to chase my dogs sometimes. They fit perfectly, recommend to get bearing for your transmission. My personally I'll probably build a high speed transmission and a low speed transmission or maybe just but another rc.

## 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

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-04-23*