I don't want to wait to have mine re-built as the racing season in va. is starting now. I had the car at the track for the first time this past weekend and it's clear I need a new box. The one I have in it I bought used and re-built it using the stock gears, as I couldn't find any new gears. I'll see if I can find a 20:1 at good price. Rockauto has 24:1 for $317 and 16:1 for $270. They are called new, but the fine print I see says new gears. I think it's just a re-built box. A new box at $500-600 doesn't excite me as I'm tired of spending. maybe new gears are now available.....