INJORA Drive Shaft Black Steel Front Rear Center Shaft with D-Shaped Hole for TRX4M Defender Bronco 1/18 RC Crawler Upgrade, 2PCS

Nice

After burning through the stock drive shafts, then replacing them with a few times with the brand plastic parts, I had enough. These high quality metal replacements work perfectly on both Bronco and Defender TRX-4, and have stood up to rigorous field testing (kid tested haha). There are lots of these to choose from, but after research I grabbed these. Good price and worked great! I will warn, they do make the machines drive a little less smooth, especially at full tire turn, but it's hardly noticeable and way better than the alternative. These things are built for off road anyways!

This is a great upgrade for the stock TRX4M - plastic to metal conversion. It's a no brainer. They're metal so they're a ton stronger than the stock plastic ones. They look way cooler than the stock ones as well. And they're heavier so it helps keep the CoG low. They're also from Injora - one of the most reputable brands in the business. Easy enough to assemble and came with all necessary hardware - a couple of set screws. Make sure when you install them, you install them "in-phase". Google that and you'll see what I mean. Installing this way will help reduce torque twist.

Can't argue with the build quality! Definitely a must, especially if upgrading for a brusheless motor, as the stock transmission axles will break. However, be aware that these will introduce some wheel slack.

Great upgrade for the trx4m

Injora is great for the price! Trx4m bronco