Most Hewland gearboxes and gear sets (others make gear sets as well for Heland boxes) are racing parts. Virtually all gear sets in Hewlands are straight cut racing gears. Before any one busts a gut, I acknowledge that there may be some helical cut gears out there, but by-and-large, you will find straight cut. Most people, once the facination is over, will not run straight cut gears on the street for long. If you are building a race car though, Hewland is the gold standard of racing transaxles in my book. And if you don't believe me, wait till you see the prices; then you will /ubbthreads/images/graemlins/smirk.gif
Regards,
Lynn