The drive lever on my gear-drive Metro 36 constantly catches in the neutral lock or parking brake position. Some days it's so bad it seems I spend almost as much time messing with the thumb latches as I do mowing. Every other time I make a turn, I have to jiggle the latch to get the wheel back into drive. It's usually a little better when freshly greased, but I grease it just about every time I take it out, and still I have this problem. It's not only time-consuming and extremely annoying, but dangerous. I once had both wheels lock in neutral on me with the mower pointed uphill and me between it and a fall into a rocky creek bed. I only just managed to get the wheels moving again before me and my Metro tumbled into it. I have tried tightening the thumb latches but that's no good; it just locks up the drive linkage. I have been considering filing down the channels on the thumb latches to "encourage" the pin to slip into the drive position when I release the lever... Has anybody else had this problem, and how did you deal with it? I've done some searches, but couldn't find any discussion of it on the forum.