Well I tried this stuff, and it did not work. I think the problem has possibly gotten worse. I get a pretty big shudder that comes from directly under the center console when accelerating and turning under 5 MPH. After that speed, all is well. Tranny was completely rebuilt about 25,000 miles ago. What could be some causes/fixes for this shudder? Should I try another 2 ounces of the "Instant Shudder Fix"?