What would cause my 01 SE automatic @ 152k to not accelerate from a full stop? It takes about 3-5 seconds @ 3000+ rpm from 0 mph in D or OD for it to catch speed, unless I switch to L-drive. I was thinking the torque converter but I have not had any noticeable sounds or issues before today. I've just bought the car the tranny fuild is as dark as oil but doesn't smell burnt. There is no leaks or abnormalities except that one issue. After I pass about 20 mph it drives fine. I'm gonna replace the tranny filter and fuild asap and I probably won't be driving it anymore because I'm unfamiliar with this car. Before I proceed to change the filter is there anything dire I should know like my tranny is on its death bed before I try and maintain it?