Ok guys I got my Slayer today and the drivetrain has some binding.I pulled the trans and it seems to be the front and rear diffs.The front and rear diffs make a clicking sound.This is my 1st Traxxas I have never had a RTR just kits.The diffs in my other Buggies/Truggies have allways been smooth.Is this normal.Do they just need to be broken in?I realy dont want to continue the conversion until I know this is ok.