| |
Click on image for the lowdown. 
====
|
| | Forums66 Topics128,050 Posts1,055,754 Members48,426 | | 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!
|
| 
#77464 05/11/2007 4:08 PM | Joined: Nov 2006 Posts: 33 New Guy | | New Guy Joined: Nov 2006 Posts: 33 | Hello
I am looking for internal parts for a 4 speed trans in my 1949 3100. Trans is good shape but need 3/4 syncronizer. It grinds if I shift it to fast. If I shift it slow or double clutch it's ok. Does anyone know the trans model???
Thanks
Bill
TIGHT IS TIGHT,TOO TIGHT IS BUSTED
| | |
#77465 05/11/2007 4:12 PM | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Bill, I'm going to guess that your transmission is a SM-420 and that parts are readily available. I have enclosed a link to a outfit that has good info and it appears all the parts you would need for a rebuild. Good luck!  http://www.novak-adapt.com/catalog/sm420_parts.htm Stuart | | |
#77466 05/11/2007 4:14 PM | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | That would be the SM420. Check over on the Links page, there's a couple of sites with info on that tranny. And if you don't have a shop manual, check out the Online Chevy Manual site. I think that there is a '49 manual on there, if not, any of the later manuals would have info on the trans as well, as it was used up to '66.
I can relate to the syncro problem you're having. A guy I ran around with in my youth had a '49 1 ton 4 speed. It did the same thing.
Bill Burmeister
| | |
#77467 05/11/2007 8:49 PM | Joined: Sep 2006 Posts: 1,276 Shop Shark | | Shop Shark Joined: Sep 2006 Posts: 1,276 | The Novak site that Bill gave is a good place to look. Also there has been alot of talk about the SM420 in the Bigbolts. | | |
|
|
| |
