2PCS Kids Ride On Car Gearbox 12V RS550 40000RPM High-Speed Motor Gearbox for Power Wheels Kid's Ride on Toys Upgrade,High Torque Motor for Kid's Electric Vehicle Replace Parts,2 Free Coupler

So far no problems. Installed easy and works great. My son loves it

Perfect fit for the CAR rock truck obviously I just got them and installed them so no idea on the longevity!! I’ll probably have to change the motor back to the 11000 because the 40000 is way too fast, but it was one of the only ones that gave the proper measurements. I think the 11000 rpm is an odd rpm for these ride on’s, because of the small tires! I chose to solder the connections because the factory plugs were different! Anyway know that the rpm on this motor is FAST!!

As soon as I got them installed I noticed that it only goes in reverse, will not go forwards at all, so I wasted time and money and will be having to put the originals back on.

These replacement gearboxes and motors are easy to swap out once you get the ride taken apart. I cannot yet speak to their longevity but it is nice to see the metal gear spliced into the mix. I have swapped motors and controllers 10s of times between my 3 kids and this is a promising bit of kit.I will say I have only had one of them strip gears. Typically I am replacing the motor because overvolting these motors is already stressful for them but once you start having neighborhood kids jump on back and weighing these things down that is when the real damage happens. Eventually the motor can't handle the extra stress and just gives up the ghost. The alternative is to put a properly spec'd fuse in there but then you will be at your kids side for half the day as they blow fuse after fuse. I prefer to just allow them to destroy the motor and swap in a new one ever so often.The motor is functioning well out the box with no complaints on built quality or anything. I will update if this motor burns out faster than others.

Upgraded the kids powerwheel from a single motor to double. The kids are now able to drive on the grass in the safety of the backyard. Seems durable so far as we have many hours on them already.

Didn’t fit perfect. Requires modification

Good fit easy install, works great. Built well and makes for easy upgrade to dual motor on my kids power quad. I power them both in opposite polarity with an 18v Milwaukee battery.

I fried my daughter's maserati car engine and thought it the car was done for. Then I came across these. While it is not an easy plug it in and go, I was able to get it all working and my daughter is enjoying her car again!