Recently I noticed that my automatic 98 Civic LX was shifting hard. The hard shifting mostly occurs from 1st to 2nd, Park to Drive, and again on engine braking. I took it into the shop and got the transmission fluid flushed (105k miles and have never done anything to the transmission before). That seemed to fix it for about 2 weeks... now I notice it doing it again. The tech told me that there was a Honda bulletin out regarding the transmission and it suggested replacing the solenoid. Does this seem right? Has anyone else experienced this problem or know where I can find said bulletin?

Thanks!