1/12 Scale Rc Car

This RC car is very Fast! It can do donuts on dry pavement and is great off-road! I think it needs a new front and rear differential. It sends power to motor but wheels don’t spin. I was able to fix it twice before by tightening a screw that holds the drive shafts in, but I believe the screws are stripped. The shell is scratched and scuffed up from rolling it. But everything else works great. I have 3 powerful batteries for it, but only ever used 1 of them. So the other two are brand new. And they last for 15-30min depending what speed setting your on. I need it gone ASAP it’s just been sitting in my house and I am done messing with it.
$90 obo.