Here is strange problem: 760T auto 214k miles, family in hurry to get somewhere and had to pass someone on a two lane road at full power. A mile of two later the car starts to vibrate from what feels like the transmission, even when coasting. As we begin to accelerate the vibration starts again, it starts to lose power, like it has square wheels and can't push itself, turbo is being used but still no use. Pull into a parking lot and feels like the brakes are not working very well, maybe losing vaccum. We walk around the car and look under the hood for the obvious...nothing to see. Start back up again, seems to be running fine, get into traffic, starts to vibrate again. I drop it into 2nd gear, it revs and seems to be running better. Go back into drive and drive the car gently, seems to be ok.
We are afraid to drive it now not knowing what to expect.
The tranny fluid lines were just replaced and the fluid level is good. The tranny is a Volvo re-manufacture with about 90k miles on it.
Anyone have any ideas about what the problem could be?