INJORA 15g Stainless Steel 40.3:1 Low Range Transmission Gear Set for TRX4M 1/18 RC Crawler Car Upgrade

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.

Simple installation, great quality, good for durability, smooth operation, just be sure to add grease.

The media could not be loaded. Amazing quality, gears were solid metal and very cleanly cut!Small gear is a very snug fit 🤌🏽“Body-meus ripper”

At first I didn't know that Injora offered these in the "like stock" ratio, so I went for the Globact set. The Globact set of gears were disappointing to say the least so I was really pumped when I found these! This set is smooth, quiet, and durable! I run them on a very heavy, brushless, TRX4M with a 3S battery and they're doing great. These are the only TRX4M gears I would use or recommend. Nice job Injora!

The media could not be loaded. Easy to install, great improvement climbing rocks. works with stock transmission. Lots of torque, especially paired with traxxas brushless motor. Top speed is slower than a normal walking pace

Second test run and snapped the front drive shaft. They work great. Truck was climbing good and slow and not stopping. Simple installation, buy the bearing set since you will be opening the transmission anyways.

When I first got the trx4m I noticed whenever I would bind the tires it wouldn't have the torque to pull it out but these gears solve that problem. They give you that low end torque a crawler needs to go over everything especially in a bind. If you keep the stock motor it goes really really slow and it doesn't have a high speed when you need it but if you combine the 180-48 turn motor it is immaculate. It will give you everything you need. A little bit of caution though with how much torque it gives I would think it can break axles now and possibly other things you're switching from plastic gears to metal gears so still be careful on that throttle in a bind. Product is as displayed

They fit perfectly in mt trx4m and the machining looks great. I have ran them a few times now, with no issues. I have steel drive shafts and axle shafts, so they really get tested. Well worth the money.