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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#39753 02/02/2002 8:20 PM | Joined: Jan 2002 Posts: 6 Member | | Member Joined: Jan 2002 Posts: 6 | Does anybody know what transmission a '47 1-1/2 ton 4400 should have? I believe mine was changed out along the way. Also, is the transmssion the same for the smaller trucks or is it a heavier version?
Old is Good!
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#39754 02/03/2002 2:54 AM | Joined: Feb 2000 Posts: 587 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 587 | SM 420 4spd was for 48 up to 67. It has the synchronizers in it, to aid shifting. You may have had early 4spd w/out synchros and have to double clutch up and down shifting, a pain! Maybe someone put in a later trans for this feature. Don't know what model it is in early trucks. Ask Tony, he has an early 3-ton, he may know what hes has in it. He's on the boards here, check for his name and click on profile to get email address.
G.L. Grumpy's
Old Iron Ranch
Huntington, IN 46750
MM R tractor, Speedex
and Power King tractors
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