Click on image for the lowdown. 
====
| | | Forums66 Topics128,012 Posts1,055,313 Members48,419 | | 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!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jan 2013 Posts: 1,518 'Bolter | | 'Bolter Joined: Jan 2013 Posts: 1,518 | A buddy of mine has a 1950 3100 truck that is running the stock 216 but converted to 12volts. He just replaced his flywheel when he did a clutch job because it was chewed to hell. He replaced it with 139 tooth ring gear. He now has a weird gear whine when he engages the starter but no gear clash. How many teeth on the starter should he have? When he changed to 12v he got rid of the stomp starter. My thought is he has a starter in there that wants a 168 tooth flywheel. Am I wrong??
Thanks in advance,
Steve
Last edited by sstock; 05/24/2018 4:54 PM.
1953 Chevrolet 3100261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done In the DITY GalleryVideo of the 261 running1964 GMC 1000305 Big Block V6, sm420, the next cab off restoration
| | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy sstock, unfortunately both six and twelve volt starters have the same number of teeth on their starter drives (if I am remembering correctly) the drives do have a different pitch from one another though, so they each fit the different number of flywheel teeth. If you friend is using a twelve volt starter the he needs the twelve volt flywheel with 168 teeth. There were some six volt solenoid type starters for cars, but I don't know how long a six volt solenoid being fed twelve volts all the time will last, the starter will be okay as long as the engine is not having to be cranked excessively to start. So you know which flywheel you have, now you have to determine what starter you are using and make adjustments so you have a compatible flywheel and starter, hope that helps. | | | | | Joined: Oct 2016 Posts: 916 'Bolter | | 'Bolter Joined: Oct 2016 Posts: 916 | Tell him to put his 6v starter back in and enjoy having starter that turns over at a decent rate.... there is no problem using the 6v starter with a 12v system. good 12v flywheel/ring gears are getting hard to find. You can also heat the ring gear and flip it around if one side is worn (but that won't fix it if there are missing teeth on the ring gear)
Last edited by Norcal Dave; 05/26/2018 2:08 AM.
~ Dave
1950 Chevrolet 3600 3/4-ton with 261 engine & T5 Transmission
| | | | | Joined: Jan 2013 Posts: 1,518 'Bolter | | 'Bolter Joined: Jan 2013 Posts: 1,518 | Thanks guys, waiting to hear from him on the starter, Im with Dave, thinking it is a 12v starter.
1953 Chevrolet 3100261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done In the DITY GalleryVideo of the 261 running1964 GMC 1000305 Big Block V6, sm420, the next cab off restoration
| | | | | Joined: Feb 2004 Posts: 29,743 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,743 | A 6V starter has an armature shaft diameter of approximately 5/8". A 12 volt starter has a 1/2" diameter shaft.
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!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | |
|
|
