The stock screw that holds the inner-diff gear in place is too small to hold the upgraded replacement (on 144001). However not sure if wltoys intended this as a fix but you can use the existing screw that holds the hub pins in place and swap the screws over, hope this helps some people.

The stock screw that holds the inner-diff gear in place is too small to hold the upgraded replacement (on 144001). However not sure if wltoys intended this as a fix but you can use the existing screw that holds the hub pins in place and swap the screws over, hope this helps some people.

The stock screw that holds the inner-diff gear in place is too small to hold the upgraded replacement (on 144001). However not sure if wltoys intended this as a fix but you can use the existing screw that holds the hub pins in place and swap the screws over, hope this helps some people.

The product received is different than the pictures AND different from the description. The material appears less shiny, and the teeth are way smaller (not as tall of teeth) as the picture. The tooth count on the big differential gears is different and the count of teeth on the drive shaft output gears are different as well. The largest diff gear also don't have the positioning pegs like the one in the pictures. The spider (asteroid) gears are also much smaller on the original parts. I haven't tried installing the components yet, but I imagine they will not work properly.

The product received is different than the pictures AND different from the description. The material appears less shiny, and the teeth are way smaller (not as tall of teeth) as the picture. The tooth count on the big differential gears is different and the count of teeth on the drive shaft output gears are different as well. The largest diff gear also don't have the positioning pegs like the one in the pictures. The spider (asteroid) gears are also much smaller on the original parts. I haven't tried installing the components yet, but I imagine they will not work properly.

The product received is different than the pictures AND different from the description. The material appears less shiny, and the teeth are way smaller (not as tall of teeth) as the picture. The tooth count on the big differential gears is different and the count of teeth on the drive shaft output gears are different as well. The largest diff gear also don't have the positioning pegs like the one in the pictures. The spider (asteroid) gears are also much smaller on the original parts. I haven't tried installing the components yet, but I imagine they will not work properly.