BUSY BOLTERS Are you one?  The Shop Area
continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.
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Jul 21st, 2025 | | | | Joined: Aug 2016 Posts: 84 'Bolter | | 'Bolter Joined: Aug 2016 Posts: 84 | My 1947 3100 pickup transmission has the floor shifter. It is actually 3 forward speeds with reverse. My understanding is this transmission is factory original to this truck. How can I learn what transmission (name/model) is in my truck? Does the transmission have this information stamped on it somewhere? Thanks, Ray | | | | | Joined: Sep 2001 Posts: 29,262 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,262 | The GM part number is shown here.Maybe someone knows what the casting number is on the case? There might also be a date casting code on the case? | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Are the top 2 gears synchronized?
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Aug 2016 Posts: 84 'Bolter | | 'Bolter Joined: Aug 2016 Posts: 84 | I'm not sure. I have not taken it apart. | | | | | Joined: Nov 1995 Posts: 5,470 Bond Villain | | Bond Villain Joined: Nov 1995 Posts: 5,470 | Buck -- as for Ed's question, do you have to double clutch all three gears when you drive it? If yes, then they're not synchro'd.
~ John "We are not now that strength which in old days Moved earth and heaven; that which we are, we are" 1948 International Farmall Super A1949 Chevrolet 3804In the Legacy Gallery | In the Gallery Forum1973 IH 1310 Dump2001 International/AmTran RE3000 "Skoolie"2014 Ford E-350 4x4 (Quigley) | | | | | Joined: Aug 2016 Posts: 84 'Bolter | | 'Bolter Joined: Aug 2016 Posts: 84 | I checked the service manual and it is a 3 forward - one reverse selective syncro-mesh transmission. I think gears 2 and 3 are sorta synchronized. Manual didn't give any name for transmission or model numbers. ray | | |
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