Hosim RC Car Upgraded Metal Gear M25-Set,2PCS Metal Differentials+1PCS Metal Main Drive Shaft for 1/10 9125 RC Car

The product sent will not work because it is not the same exact replacement part. The original is 12 point and the part sent only has 10 points.

Diffs and gears worked but had to use my original shaft because the one that comes with it is way to short don't know why but fortunately the pinions and spur gear fit the original shaft next rc I buy will be much better quality.....you get what you pay for. Do your homework buy something you can get parts and support for without all the bs take the time to go to your local hobby store sorry but Amazon just isn't cuttin it. I spend more time on line looking for parts than I do playing with this cheap crapp and Amazon couldn't care less they say they do but they don't

Bought the m25 set because the differentials in the 9125 can be a little weak. Figured I'd upgrade the driveline as well. Added marine grease to the whole system when I installed. Main gear stripped within 15 minutes. Pinion and differentials seem to be holding up, but the main stripped so quickly it's hard to tell how long they'll last. This powdered metal is terrible for gears.

The original plastic parts stripped out so I replace with the metal drive train. These gears stripped out even faster than the plastic ones - probably only used the car a dozen times. Worse, they stripped out the gears on the ends of the motors. I've emailed Hosim support and have received no reply.

These differentials look better and seem to be stronger than the originals. They WILL fit the Judge Extreme S920. In fact any part for the Hosim 9125 will fit the S920.I haven't played with it much since the differential swap, but we'll see how we'll they hold up.The problem with the originals, in my experience, is the screw that holds the axle cup to the differential, becomes loose, allowing the cup to spin and it chews off the "keys" that lock it in place, once the screw is tight. The gears themselves usually aren't the issue. Taking it apart and putting locktight on the screws, sometimes helps.Hopefully, these won't do that. I'll update if they do end up failing at any point.