Sticking in first on hard acceleration
When I am hard on it, it dosn't wanna shift out of first. I can run it all the way up to 6k RPM, and it wont shift, but if I let off, and let the RPM's drop to say 3k RPM, then it will shift. The tranny was replaced under warrenty just a few months ago, and I am now no longer under warrenty. Any idea what it could be.