Throne,

You may not need to buy new gears but I'm sure they are cheap with where Gilly posted. Sometimes they just move to a certain position due to being out of alignment and may not be broken. Also check the reset lever for the trip meter and the two on it springs to see if they look ok. Post a picture and I'll let you know if they look right. You never know, I think someone could have went into the one I was looking at and pulled that gear out to stop adding mileage as the gear is on that post pretty tight and shouldn't have worked itself out like it did.

Steve