P1734 code

What is your question?

i start my jeep up, put it in gear its a v8 4.7 automatic 99 grand cherokee, it starts out great, but wont shift, as soon as I clear the code with my obd 2 checker all is fine, shift great runs great. What do i need to change out? She a great jeep, did me well in the service. I want to keep her. any help would be appreciated. Wayne

What makes this problem better or worse?

wet conditions

How long has your 1999 Jeep Grand Cherokee had this problem?

year