I an a new boat owner and I noticed that the transem flexes when the boat is under full power. I have about a 1/2 inch gap between the transem and the rest of the boat. The gap is from about 3 inches from the top on the side down to the motor mount. I have a 1977 Starcraft Super Sport 18 footer with a Johnson 140 O/B. Does this indicate that my transem is bad or is this normal? If bad, can anyone give me suggestions to fix the situation. I do not want to go diving for my motor.