this is the 2nd trans..first was in NJ where I did live back in aug 2012 and i drove 3000 miles and poof it was doing theh same thing, I had to wait to get money to fix it as the trans shop screwed me on the warrenty, so I put it in a trans shop in CA where I am now and the same thing. the guy tried first to clean out valve body, which was found to be sludged. he cleaned it and he said it was ok for a bit, then did the same thing, so we just did a rebuild, where the same thing happened. I am thinking maybe speed control???? any idea's?