Just finished fixing a 2012 that had something similar to what you described.
If you held the brake with the left foot and stepped on the throttle with it in gear, you would hear kind of slight scrape and clunk the first time, then if you put it in reverse, it would do almost the ssame scrape-clunk.
We thought it might be broken motor or transaxle mounts at first, and even replaced the bottom transaxle one, because the rubber in it was a little torn after about 150,000 miles. But the same noise was still there.
Finally, after we used an endoscope to look at the top motor mounts while doing the same procedure above, we found it! It was the bolts on the driver side that hold the motor mount to the transaxle were loose and the whole thing could shift slightly each time it was torqued in the opposite direction. The minute we tightened the bolts up, problem solved.
Since we had replaced both motor mounts, and it worked fine for a couple of years, I think maybe those bolts should be installed with lock-tight, which we didn't do, although I know we torqued them to spec.
Or maybe a few of them get loose out of the 100,000 cars built.
If you held the brake with the left foot and stepped on the throttle with it in gear, you would hear kind of slight scrape and clunk the first time, then if you put it in reverse, it would do almost the ssame scrape-clunk.
We thought it might be broken motor or transaxle mounts at first, and even replaced the bottom transaxle one, because the rubber in it was a little torn after about 150,000 miles. But the same noise was still there.
Finally, after we used an endoscope to look at the top motor mounts while doing the same procedure above, we found it! It was the bolts on the driver side that hold the motor mount to the transaxle were loose and the whole thing could shift slightly each time it was torqued in the opposite direction. The minute we tightened the bolts up, problem solved.
Since we had replaced both motor mounts, and it worked fine for a couple of years, I think maybe those bolts should be installed with lock-tight, which we didn't do, although I know we torqued them to spec.
Or maybe a few of them get loose out of the 100,000 cars built.
