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| | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | I just recently acquired a vintage transmission and am not able to find much information on it.
It is a 3 speed floor shift with a 4 bolt top cover, torque tube variety, likely a truck as the lower mount holes are threaded.
Casting Number 590452, Date Code L 22 0 which based on some information I have found is likely 12-22-1930.
It also has a very cool "Bowtie" cast in the housing just below the casting number and also on the top cover.
It is non syncro with straight cut gears and in remarkably good condition for it's age.
I would like to know what year vehicles used this transmission and whatever else someone could share.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | Are you sure the top mountain holes aren’t threaded?
1931 was the first year to have external mounting ears.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Feb 2004 Posts: 29,771 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,771 | Just guessing- - - - -you've probably got a trans from the late 1920's or early 30's. In the mid-1930's GM launched an advertising campaign for the "silent second gear"- - - -a transmission with constant-mesh helical gears and synchronizers to do the actual shifting rather than sliding straight cut gears in and out of mesh. People were so used to the noisy straight cut 1st. and 2nd. gears that they would drive for miles in second- - - -forgetting to shift to high gear which was direct drive.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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Love your enemies and drive 'em nuts!
| | | | | Joined: Mar 2004 Posts: 6,214 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,214 | 1931 is a one year transmission case p/n 590451 (Model 'AE' Passenger and 1/2 ton). It's not unusual to have the part number one number off of the casting number back in the early days. Mike B  | | | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | Thanks for the input. The top mount holes are open and the lower ones are threaded. There is no synchronizer in this trans and all the gears are straight cut. The oldest book I have is a 1935 car Motor's Manual and it shows a non syncro trans for the Standard and a syncro version for the Master. The book also shows the 35 standard trans with some helical gears so this one is an earlier version.
It also does not have the bearing retainer with the sleeve for the T/O bearing to slide on. Hopefully someone locally can use it.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
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