I am a big fan of cages,they make them feel safe and calm and cozy.Try putting her in the back of your car (if you dont have a cage) and not go anywhere .When she settles then bring her out and keep doing that for a little longer each time untill she is happy to just sit/lay and chill.
Try just going for short distances like round the block or even just up the road untill you are happy that she is happy.I had 2 GSDs that went mental in the back but when we set off they went as quiet as a mouses and when we stopped they went mental again.I spent hours just going and coming untill i cracked it.Sometimes i never even got out the car....now that was a big tease but it had to be done.It took weeks to cure but it was all worth it.However some dogs just have it in their nature to do that,i have one girl who is 11 this month and she still goes mad when we get in and stop and no amount of time has stopped her,i have agreed to disagree with myself on her.........but she is so loveble with it and she isnt going to change now!!!!!!!!!best of luck.