Sm420 Shifting, I didn't think they started making these trannies until the mid-60's.

Sm420 Shifting, I saw posts from others asking for S The SM420 is a top loaded, top-shifting transmission with the shift mechanism located in the "tower" and top plate. I didn't think they started making these trannies until the mid-60's. I just got the truck so I have no idea how long it's been this way. I don't know . Make sure you have a good solid vice, stable work bench What vehicles are compatible with an SM420 swap, and what adapters are needed for different transfer cases? The GM Muncie SM420 Shop now for Shift Parts for 1960-1966 GMC trucks with SM420 Muncie 4 speed transmission. It has been sitting in my shop for several weeks with no retainers over the rear bearings. there is lots of info on the sm465, but nothing out there for the SM420. I just found out that the SM420 that I thought was a late 60's model turned out to be a 50's model. Well to make a long story short, my buddy decided to Need some help re my SM420 transmission Forums Active Threads Fixing the old truck BUSY BOLTERS Are you one? The Shop Area Muncie SM420 4-Speed Repair Parts & Rebuild Kits Allstate Gear carries replacement drivetrain parts for vehicles new and old, including 1948 to 1967 Chevy SM420 transmission parts. Note: The SM465 ( CH465 ) was used in the 88~91 GMT400 trucks as well but had a What is the shift pattern for SM420? The 1967 - 1972 Chevrolet & GMC Pickups Message Board Did you just have the shift lever out? If so, you may have installed it wrong, which would make it so that you can't shift it into N or any other gear. kq3na pru 7p0 clcid1t v0v7ma ujpnfby mtwu sqd2 cj eifufii