The old Bulletin Board has been removed from the server. And with recent "spring" cleaning, we are removing links back to it. The BB is still out in cyber space (to some extent) thanks to The Wayback Machine.
Is this casting number a Saginaw 4 speed? The side of tranny casting number is GM 3781980. It has a granny gear and wondering if there's a swap to eliminate granny and get better gearing for in town and highway use. It appears to be the original transmission. Thanks.
you have the standard SM420 4 speed, usually folks just ignore 1st and use it as a 3 speed .... your choice is go with the original standard 3 speed, no granny, but still 1:1 high, or find an original style OD 3 speed, or switch to a modern OD trans .... or change the rear gears to the [sometimes] available 3.38 ratio
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
