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Reviewed in the United States on March 9, 2024
Stock diff gears broke. Tried one other before this and it kept binding up. Went to this and it perfectly worked.
craig
Reviewed in Canada on March 9, 2024
Love the upgrade from the plastic ones and fit perfectly 5/5
Simple42
Reviewed in the United States on March 14, 2024
Quality gears fitment was excellent and run smooth, Traxxas TRX 4M
Rick Barg Customer
Reviewed in Canada on February 20, 2024
Easy install stronger than the stair cut gears
gt60
Reviewed in Germany on October 16, 2024
Eins der 24er Zahnräder läuft nicht wegen unrundem Lauf, somit zu teuer. Nach der schlechten Bewertung hat sich der Händler gemeldet und das Problem behoben indem ich für das fehlerhafte Teil Ersatz kostenlos bekommen habe . Toller Service 👍 Danke
JB
Reviewed in Canada on January 21, 2024
These full metal gears are a great upgrade for the trx4m. Very easy to install and while you have it apart I recommend the bearing kit as well. My stock plastic gears stripped out so I got these and they are a great price and fit perfectly
1st.trax
Reviewed in the United States on May 31, 2023
One of the ring gears came with the center hole bored at an angle so that when the axles are inserted they make a "V" about 2 degrees! the other one was perfect and so were the pinion gears. This is a clear case of a single CNC machine not being calibrated correctly and a lack of quality control on the way out. With a large facility running many CNC machines, I felt confident that if I reordered, I would get good parts. If my next set comes without issue, I will up the rating to 5-star and assume this was a freak incident rather than the norm.This is why I ordered from Amazon. I do not have to deal with a missing customer service link and phone number on the injora website.Has anyone else had binding after installing these? Might check the axis angle... Would love to hear about your experience.PS. At the bottom of the Injora website is all the common links, but the link to customer service is not even a broken link, just text saying Customer Service. LOL
Russell
Reviewed in the United States on May 2, 2023
I got warped differential gears. It was almost like the tires were rubbing really badly, but I have the extended hubs on and the tires weren’t even close to the steering. It lurched and shook a ton. So I will be returning. Not very high quality from injora, which is unusual.
Jon
Reviewed in the United States on March 10, 2023
After adding quite a bit of brass to my TRX4M, the plastic factory diff gear in the front finally started failing. Just finished installing the Injora steel diffs and I am amazed at how much slop went out of the drivetrain. They fit perfectly in my truck. I'm running stainless Injora axles, replacement sealed bearings, and Treal brass diff covers. The mesh on the helical gears is perfect - super smooth on the set I received. Highly recommend. Ordering a second set now for my son's TRX4M.
Cosmo
Reviewed in the United States on December 18, 2023
Before these were introduced back in Dec 2022, the rear diff of the TRX-4M had issues where the rear diff would click if you're going in reverse up an incline (stuff you would do during a crawl) and you could hear the stock plastic diff gear teeth skipping due to its loose tolerances. These diffs will fortify and improve your gear mesh as it's now perfectly aligned.
ZiPZaP_33
Reviewed in Germany on November 17, 2023
Funktioniert super ohne Probleme plug and Play
Wallace Routh
Reviewed in the United States on October 2, 2023
I’ve read some reviews where people had issues fitting the bearings on the ring and pinion but mine went on absolutely perfect! Great quality as usual, I’m very happy with them, a great upgrade!
Chocolate Marbel
Reviewed in the United States on January 20, 2023
Please read my entire review:Quality of these things is crazy for the price. The gears seem to be hardened as well from what I can tell, gear mesh is pretty decent and no binding! Love that these are helical gears similar to real trucks.**As the title states, theses are not compatible with the stock bushings. The differential shoulders are knurled to grip onto the inner race of the bearing kits. Obviously if you decide to run the bushing and go against my advice you will end up with either severe binding or badly worn differential carrier bushings. Buy any bearing kit with this purchase.Some modification is required**So now the pinion bearing fit is extremely tight and you will not be able to slide the pinion down onto the bearings as intended. To remedy this I chucked the tip of the pinion gears. Onto my drill gently and with a tiny sliver of 800 grit sand paper, spun/sanded the shaft/ bearing fit down so to resolve this issue. At medium speed with 800 grit this took less than 1 minute of sanding/spinning and voila. Done. I had fast eddy bearings, results may vary.
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