I'm not sure why either unless they thought it had more drum contact area by expanding both shoes. The driveshaft of course turns whenever the wheels turn but it does seem like the long way around the barn.


1953 Chevy 5-window 3100
In the Stovebolt Gallery
More pix on Picturetrail

Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain