Odd Kick?

[ropeman]

I've had this happen twice now and come to think of it on the same stretch of road doing about 80 - 90 ish (obviously a private road).

All of a sudden it's like the car loses drive for a fraction of a second and then there is a kick from the rear end (like a bit of a thud), and then we're back to normal driving????

This has happened twice in about 500 miles, I own an 88 325i Any ideas?