Injora TRX4 Clone Axle Deep Dive

Hi guys,
The highlights:
- Guts of axles are directly transferable, Injora diff assembly is a hair tight in Traxxas axle housing but I think it would run in (use your own discretion)
- Traxxas T-lock flipper works with Injora but Injora was tight in Traxxas and I didn't feel the need to force it. Visually, I don't see why it wouldn't work. Attempt at your own risk. I probably should check this because of the cost of those Traxxas T-lock cables ($18 Cdn), stay tuned
- Rear axle portal housings do not match up
- Front axle portals work fine in either
- Rear axle portal input shaft outer bearing in Injora is 5x10x4, not 4x10x4 (not sure about the front, didn't notice at the time I had it apart) This is not an issue if you are swapping guts but is an issue if you are swapping ONLY the portal input gear. A Traxxas bearing set will not be 100% compatible, you'll need (2) 4x10x4mm bearings
- Traxxas drive shaft does not fit Injora input shaft. Hole is just a hair too close to the axle
These axles are pretty darn good but there are a couple of problems. To me, that means you have to look at the $$$ to see if they are indeed a good deal. Because I can get a set of TRX4 axles removed from a brand new truck from JRC for about $50 Cdn more there's a pretty good bench mark. To me, if you have to put any parts into these the value becomes dodgy right away, so you have to be willing and able to run them the way they are. The only real problem is the pin hole in the pinion input shaft which needs to be modded to fit a TRX4 drive shaft. Pretty minor fix in my book.
Now we need to see if they are durable, because genuine TRX4 axles are gorilla strong. Stay tuned.
Check them out on the Injora website: www.injora.com...
Genuine Traxxas at JRC: www.ebay.ca/it...
Wrench to drive or drive to wrench?

[@Winston-hw8wb]

very informative video.. I grabbed one for 188€ shipping incl. Thank you for your input💪💪

[@germanopinheiromartins4547]

About injora locking system: has It been working well yet? Does It need some mod to work fine?

[@drivetowrench2709]

I've had no problems at all so I take back my caution ;^) If you haven't seen Exocaged RC beat the crap out of the Injora clone chassis, it's impressive (He doesn't name it in the title if I recall correctly, but the clone videos he made recently are the Injora TRX4 clone). These axles are probably as durable as the genuine ones (maybe more). I feel silly for being nice to mine

[@khairulhasif8640]

Hi bro can we use this trx4 clone axle with scx10 gearbox.. Does it run like normal or opposite direction.. Thanks in advance 🙏

[@drivetowrench2709]

Yes, I have used them with an SCX10 trans but I've never checked the direction specifically, I have always been able to reverse the motor wires if needed (I'm not that worried about "proper" motor direction in a crawler). If my mental gymnastics are correct, the Traxxas trans output turns in the opposite direction as SCX10 and the portal gears switch it back to "normal". I believe that if the ring gear on your old SCX10 front axle was also on the left the rotation would be the same. I hope that makes sense. (You can map out your gears with a quick sketch, every gear mesh to a different shaft reverses rotation)

[@khairulhasif8640]

@@drivetowrench2709 thank you so much for sharing 👍👍👍👍

[@khairulhasif8640]

Hi bro.. Can we install brass to this axle?

[@drivetowrench2709]

I haven't added any but I would expect it to be similar to adding to stock TRX4 parts, for example, diff covers are somewhat notorious for need a little massaging to fit perfectly (if you buy Chinese its hard to know what you're getting). I'd be surprised if there were huge problems because side by side they are almost impossible to tell apart.

[@AlphaPhaseSleep]

the gears are actually powder metall

[@ka4172]

I hope Injora make the TRX6 Chassis too.

[@BD-Daddy]

Not meaning to bother you. But I got these same axles. All I done was disassemble them to add grease. But I noticed a paper thin shim in my bolt tray and have no idea where this came from. I am thinking the front portal housing , but I only have one of them that is in my tray. Do you know where this shim would go? It is the size of one of the input bearings the front Input portal gear rides on. Hope I explained it good enough

[@drivetowrench2709]

It's been a while but I think there was a shim between pinion and the bearing (inside the pumpkin). That's the usual spot to use a shim to set the gear mesh (The diff itself can be shimmed but mine were not) . I don't think there are any in the portals.

[@michaelwatson3025]

Thank you for the update video

[@MrBigChris620]

Great video!

[@pauls1816]

If I was to get these for a custom project, locked both diffs with a spool and got rid of the open diffs, and put under/over gears in them, would that be feasible or are these too different

[@drivetowrench2709]

The slight binding that I talked about would concern me with the under ring gear because that small increase in diameter might be a problem. I would expect that running the over in the front and stock in the back would work fine. Personally, I would rate these more a run as-is solution. If I was spending that kind of money on gears I would go with Traxxas axles off Jenny's RC because you know everything will fit and the Traxxas have no question marks on durability of the front CVs and the axle shafts. Plus, you can probably sell the diff parts and the cables. But I'm also way too cheap to shell out whole axle money on a ring and pinion, so take my opinion for what you will...

[@ka4172]

Does this axels worth the money or does they fail now?

[@drivetowrench2709]

I've had no problems but I haven't been very hard on them. Dusty and damp conditions, no submersion. I mostly run the front unlocked and the rear locked. I would buy them again, especially because genuine TRX4 parts are getting a lot more expensive in Canada. The 2spd TRX4 clone transmission in the Injora chassis that comes with these axles has plastic gears which I've heard are not great, but a lot of people also seem to think shifting on the fly is a good idea and IMO it is not

[@jasonreed9635]

have you tried installing the locker spools in them from the sport axles?

[@drivetowrench2709]

No, sorry, no time. Hardly any running yet either. Got the lockers working really nicely, that's about it... BTW parts are available now for very reasonable prices

[@RanjeetSingh-qt9yh]

Would love to have an update on them once you use them or maybe even abuse them. Thanks for that detailed video.

[@drivetowrench2709]

For sure. Weather is total shite... probably another month away at least They do lock and unlock well just farting around so those concerns seem unfounded (video soon)