The Saganaw transmission that is currently in your truck is a full syncro unit. The original SM318 does not have a syncro first gear so it would be a step down if this one shifts and drives OK, just straighten up the issues and drive it. 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
