After studying the pic a little more it looks like you got the pinion gear 2 maybe 3 teeth out if sink. That could be your problem
You have to make sure you clock the gears right and get them in perfect alignment. Also you have to weld on outside. The inside welds and gears being out of clock are what's messing him up.Yes I know. I was about to say I've heard I welding the front did but I didn't know this is how it worked. And ok this is one his suki. I was wondering about welding the rear. Suzuki is IRS. But still hth dose this work?