How to repair a broken u-joint?
 

I have a Losi rock crawler and the u-joint (that's what I would call it on my car) that connects the rear drive shaft to the transfer case has come apart (and gone missing somewhere in my backyard). I looked at the front drive shaft and it looks as though there is a pin that is pressed into place to hold the u-joint together. How can I fix this? Is this a part that most hobby/RC shops would have? Do I need specialized tools? Thanks for your help.

***If you look at the picture you should be able to see at the top left that the driveshaft end that has come out from the transfercase.

Thanks again.

It's a center cvd there is a barrel and a pin that goes through the barrel that is held on by a set screw the set s few probably fell out. You will need a new barrel and set screw and pin

Chances are you can find the parts on eBay. The only tool you need is an allen wrench for the set screw. It's a tiny size maybe a .50 or a 1/16. Good luck with the repair and welcome to the R/C world. :)