Part 1, Part 2, and Part 3, if you haven’t read it.

Now that I was confident that the components I purchased worked perfectly fine, it was now time to embed the components within the quad power wheels.

The first part was figuring out where to place the DeWalt battery adapter. There was enough room inside the seat, but whenever I wanted to swap out the battery, I would have to unscrew the seat every time, which would be an inconvenience. Another option was placing the battery adapter towards the back, but ultimately, I went against it since I was afraid that with a heavier battery, there would be too much weight distributed towards the back, possibly making the power wheel lean backwards, which could be dangerous. So, I was able to find a spot closer to the middle.

Originally, I wanted to place the battery adapter on the back

Before screwing on the adapter, I taped it to ensure the battery wouldn’t scrape the ground because that would be dangerous. Thankfully, the wheels were tall enough, giving about 5 inches of clearance. As long as she doesn’t go up a steep bump, the battery shouldn’t be bothered.

Where I ended up placing the battery adapter

The next step was placing the low voltage protection box, which was easy since there was plenty of space inside the seat, and the low voltage protection box wasn’t something I needed to be able to see once I set the cutoff voltage.

Knob placement

Next, I had to connect the speed controller. I ended up creating a small hole towards the back so the knob can be turned without having to remove the seat. Unfortunately, I made the hole a bit larger than the knob, so it dangles. It’s definitely not ideal, but it will do.

You can see the speed controller wires going towards the back, where the knob is located

Last, but not least, was placing the new gearbox motors. This part was the trickiest because the motors were a bit larger than the original, so I had to make a couple of incisions to ensure the new motor could fit.

New motor is larger than the existing hole

I took my box cutter and started making some rough cuts. As you can see in the picture, it’s a bit janky, but it gets the job done. I cut piece by piece, measuring each time because I was afraid I would make the hole too large, and then there would be no turning back. It’s much easier to make smaller cuts and measure.

The gearbox was also large, so I had to make some cuts.

Once I was able to get the gearbox to fit in its place, I just wired everything back together! It’s approximately ~130% faster (13,000 RPM -> 30,000 RPM), which was a huge upgrade. The power wheel was now able to move even if I sat on it. My daughter loves the upgrade and wants to race everyone in the neighborhood! I may add another motor, but the space may be a bit tight.

The left side shows the before picture, and the right side shows the after

Overall, here are my takeaways:

  • Difficulty rating: 2/5 - The wiring can be tricky.
  • Fun factor: 3/5 - I thought the motors would be a lot faster.
  • It’s definitely a project most people can tackle, and I would highly recommend it if your power wheel is slow.