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| | | | Joined: Feb 2018 Posts: 3 New Guy | | New Guy Joined: Feb 2018 Posts: 3 | I have a 590474 4 spd transmission. the date code above the chevron is C30 4 . Would this be a 1934 or 1944 transmission? Also on the top shifter plate 1 7 9 is cast into it.
Or I 7 9 can't tell if it is a number one or alphabet capitol I . What does that mean? Is the cover from another year? The gear shift lever is straight and has a redish brown tootsie pop knob. I ask because I have a spare 590474 from a 1938 3/4 ton and it is date coded B 18 7 main case and top cover. With typical black knob and bent shift lever.
Help with this mystery would be appreciated. Thanks.
Last edited by Muddy Creek; 03/06/2018 10:12 PM. Reason: spelling error
| | | | | Joined: Mar 2004 Posts: 6,233 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,233 | The 590474 casting was used from 1931 thru 1947. The shifter levers are the same from 1929 thru 1947, so having a bent one just means the owner bent it to suit his needs. The redish brown knob sounds like a 1937 passenger car accessory knob (black was standard issue). Mike B  | | | | | Joined: Jun 2009 Posts: 235 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 235 |
'53 Chevy 3604 Five Window Cab ('56 235)
| | | | | Joined: Mar 2004 Posts: 6,233 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,233 | That's good reading, but he doesn't have a SM-420...he has what we call the 'crash box' trans. Mike B | | | | | Joined: Jun 2009 Posts: 235 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 235 | Apparently I'm the one who needs to do more reading! 👀
'53 Chevy 3604 Five Window Cab ('56 235)
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