
Have you tried feeding her in the car (but not going anywhere) so she associates it with something nice rather than something stressful?
Then if she seems happier, maybe you could do little trips up the road and hopefully you will be able to make the journeys longer.
Does she sleep in a crate at home or do you have one in your car? Maybe if she does sleep in one at home, she might have more of a comfort zone if you are able to have a crate in your car.

We had a standard poodle in show coat like this, the drowl was like egg white and she wore a fleecy sweatshirt on the way to shows. It took nearly six months for her to grow out of it, came as a baby like this. She only went in the car when going to shows, so one a week or so. We used to give her ginger nut biscuits to help, but the journey home was never as bad so assuming she was just anxious about showing too. She knew routine well, bath night before etc. She never appeared unhappy. We eventually had her in the car every single day, not matter who was going out she was included and she got a little bit of sausage in the car. No idea whether she grew out of it or the frequency of journeys helped. Sorry can't really help you..
By vikc32
Date 01.05.12 14:29 UTC

Thankyou all , I have bought her a harness and she has worn it around the house a little bit ( just to get her used to it ), and we have been out in the car just for little trips , a couple of times and she already seems much better , so we will keep perservering and hope she keeps improving . Once at a show / ringcraft or wherever , she is absolutely fine , enjoys herself so I hope if we can crack the car we will be ok :-)
Thankyou again :-)

I used shredded paper in a soft type crate (mesh so keep ti all in).
It meant drool was soaked up and easy enough to get pup cleaned up with wet wipes and a towel. Any actual sick was soaked up and covered before it could stain or get into coat.
Her first show was the dreaded Welsh show ground route so she must have hurled at least 4 times!
Now totally grown out of it so no longer needs close confinement and can travel in the back of the car with the others.
it took about 6 months for my boy to stop dribbling as it was stress, he also wore a bib,
and we would just go out to the car every day and feed him in the car, tell him he was good and not take him any where ,
he was that bad he would start and dribble even just standing around the car not going in it, he would be cleaned up at a show and even if the car was not moving once we got to the show he would still dribble and sometime vomit it was awful we never made a big deal of it just clean up.
so after he realised food /car/nice/ we started getting in the car without it moving, back into the house food,
then into the car when we where going to start it with his food start engine eat food good boy switch off engine and back home, this took a while but was worth it, when he was eating we started to reverse the car out of the drive and back in the neighbours must of thought we where mad,
we also found out that cover the cage and i mean make it as dark as possible so he could not see any movement at all, helped he now jumps in and out the car fine, no drool etc, he has had his first long trip with us two weeks ago and no sickness no drool and only a light cover on his cage so he still can't see anything when it is moving.
so keep perservearing it is worth it