I have a 01 Le Sabre custom with 70,000 miles on her, the problem I have is that when I take off from a stop the trans starts to stumble or shutter a bit when going in to second gear when I take off faster then normal to merge into traffic. When I take off from a stop slowly it shifts fine, it has been doing this for some time and I have been concerned about it . It had a new trans put in it with only 10,000 under warranty so the trans has 60,000 on it now. I've checked the fluid level and color of fluid and all looks good, I've changed the filter and fluid a few yrs back and was thinking of changing it again. I'm not sure if it's the TCC solenoid or valve body. Any help will be great thanks in advance..