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Mod | | | Forums66 Topics128,024 Posts1,055,395 Members48,422 | | Most Online14,466
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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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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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