While cruising down the road, I lost all gears but 4th. I pulled the shifter today and found the big spring that sits under the lever to be busted. Anybody seen this before? Looks like the top cover has to come off to replace the spring. I need to put the shifter back on and see if The gears will work if I pull up on the shifter (mimic the spring). Wondering how this spring could break like it did, it's stout and all it does it hold pressure against the shifter. If you've experienced this, I'd like to hear from you.