Ski - This sounds like clutch shudder to me. When a clutch disk gets close to the end of it's life, or gets contaminated by oil or some other material (leaking main seal or clutch slave cylinder), you can get a shuddering or vibration when you first start out, mainly in reverse. You can also get rough engagement and disengagement during shifting, although most DeLoreans suffer from clashing second gear during a spirited shift. You may want to remove the inspection plate, and see if you can gage the thickness of the clutch disk. Mine lasted about 70K miles before it expired. It didn't shudder much - it simply quit transferring power to the pavement. I now have a Centerforce setup - much improvement over stock. Toby Peterson VIN 2248 Winged1 --- In dmcnews@xxxx, vegascop1@xxxx wrote: > > Hello, I was wondering if anyone else has ever experienced this problem. When I start the D, warm her up couple minutes and than start to back out of the garage I experience vibration from the rear. Also same goes when I have her out and put it in first gear its the same thing. When I get rolling and I want to put it in second really fast the tranny grinds!