I have 2002 Accent 4 door with 48,000 miles (1/2 LA freeways - 1/2 city streets). About 15,000 miles ago, I hit a pothole which I could not avoid (front end) & the underframe was damaged. Insurance paid for the repair & it was done by the dealer. The underframe was replaced & is still squeaky new in appearance. They also replaced the automatic transmission on warranty at the same time because it showed a failure code (it had been deteriorating over the last few months before the bottoming out). All was well & good with the frame except that there is a periodic frame creak which I will get & have been getting periodically for over 6 months. A body shop inspected it & replaced a bolt which the dealer paid for. The dealer has lubed the frame which takes away the creak until (I assume) the lube is dissipated & then the creak returns. It sounds like an old screen door and happens only on acceleration or deceleration in light traffic at low speeds. What do I do? Is there a body or frame filler that can be used or something else that I can research or suggest? Any relation between the transmission replacement & the creak? I'd like any ideas.