It operates the same way on the Saganaw, and other applications as well. The plunger releases the sun gear from the
planetary but does not change the manual cable position. Some earlier BW units had an electrical reverse lock out switch
that eliminated the governor. Same principal, just more electrical components to deal with.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine