Hi,
Please, more information.
What is it in? bug ? van ? thing ? type 3 ????
What year and body is it in?? convertible? hardtop??
Does it happen all the time? Winter, summer, extremely hot days, cold days, does it happen immediately or after an hour or so??
How fast are you driving when it happens?
Do you live in mountains or the plains?? Does it make any difference what terrain you are on when it happens??
Does it Only happen on the motorway (Interstate or Freeway in my world, ironically also called Parkways in spots! then again at rush hour our freeways often become real parking lots, ahhhh maybe Carpark. We Americans LOVE our cars even when stuck in miles of endless parked traffic!)
Does it ever happen when stuck in Traffic?
How long have you had this car?
Has it always happened or is this a new problem?
Did it start after any particular repair was made to the vehicle?
It could be a number of things but we really need a lot more information.
It is like a detective novel, the more clues we have, the better we can make an intelligent assessment.
Good Luck with this and send more information.
Thanks
Dave
"If you don't have the time to do it right the first time, when will you find the time to do it over again later?"