Thats an InclLiNe! Nope, they dont design them for that all the time, though it should not hurt it in the short use you probably give it. Rick had a driveway like that once, his motor had to lowered to clear the door header! The first Optimax Mercury prototype he clipped the cowling on. LOL! That is probably putting pressure on the support assembly inside the coupler and the source of the noise. It will not be an issue and if the brakes are working, then the coupler is fine. The noise we suspect is loosening at the hitch and ball assembly, also check the spring loops and shackles, pivot parts. We are suspect that your brakes are not working. To reduce that coupler stress you should use the lock out tab that came in yoru black bag, with delivery. If you dont have one they can ship one from Parts. BCB