Off-road Rear suspension system

My son ordered this for something he’s building and he’s been pretty happy with it.

This is exactly what

It's a pieces were very hard to get together

I was planning to use it for a crawler but it is not great for if you are going to physically use it. I also question a few of the pieces that they use. I had to use some of my own parts

faltó una de las 2 hojas de instrucciones, lo demas, excelente

This rear wheel drive differential and axle is simple and an easy to build drive system. However it didn’t work flawlessly the axle would slip out of the differential gear and lose drive to one side or the other. But, I finally came up with a solution. After experimenting with it a little while, I finally put a tiny peace of foam rubber inside of each axle to add a little pressure to keep the axle pressed into the differential gear.

Parts not as strong as lego and some parts dont click together or come apart without a lot of force.

Horrible tolerances means the CV joints will fall out of the assembly and the differential skips gears. Horrible.