Has any one on this forum had any experience with 2000-2004 Chevy Venture Van jumping into gear or unexpected acceleration when placed in reverse. If so do you have any indication of the cause. (background) Lady friend had two occurrences with this symptom both causing damage to buildings. Replacement vehicle is of different brand and no similar problem suggesting not a driver problem. My instinct suggests that it may have been a sticking solenoid valve and when it did not start to move she may have given more throttle then when it did engage did so suddenly also I understand that oil pressure on reverse is unregulated causing even quicker engagement. Just a thought. Thanks to all that respond.