I have a 89 760 gl turbo wagon. The transmission has been shifting hard and a lot "busy". Had the trans serviced a couple monthes ago, new fluid not synthetic. While driving on the freeway last night it quit engaging in any gear no response from down shifting I coasted to an off ramp and it would not move forward or in reverse. I had the car towed to my home and this morning I thought I would give it a go and it went around the block as usual, I'm totally at a loss but I won't take a chance in driving it in fear it will quit again. anyone have an answer, thanks,