If they are complete UE Ultralites, then yes, great deal. You will have to change the outputs probably to accommodate traxxas cvds or the stock driveshafts, but thats simple enough with these:
http://www.rc-monster.com/proddetail...d=RCMdiffshaft
and how to fit them:
http://www.rc-monster.com/forum/showthread.php?t=8012