Hmmm, not sure. Yes, In drive it drives absolutely great, My main issue with the problem is that it is pretty hilly where I live. I would much rather downshift into 2nd to slow myself down instead of having to ride the brakes all the time. I wouldn't think the modulator would have much to do with it but, like I said, I am not a transmission guy. I guess I was just hoping someone will see this and go AH!, Had exact same problem. I just did something simple and fixed it. Wishfull think'n I suppose.