| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,087 Posts1,055,985 Members48,430 | | 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: Oct 2010 Posts: 42 New Guy | | New Guy Joined: Oct 2010 Posts: 42 | Newbie here. I have a 1950 3100 with a '57 235 and 4-speed manual tranny. The rear end seems a little too wide for the truck as the tires extend beyond the fenders but I'm not sure if it's due to the tires or the rear end itself (sorry, no pictures available). Does anyone have the width of the correct rear end and, if so, where do I measure from?
The only info I have at this moment is:
10 bolt. 6-lug rims. Casting numbers: GM36 BI84 14055251
I have not opened the rear end to count the teeth, yet. Plan to tomorrow.
My truck is at my brother's and I'm heading there tomorrow so I can get more details as needed then.
Thanks.
Newbie
1950 Chevy 3100 | | | | | Joined: Mar 2011 Posts: 457 Shop Shark | | Shop Shark Joined: Mar 2011 Posts: 457 | If your truck has a '57 rear, it should be 62" flange to flange, according to a website I just checked. It should be close to the stock '50 in width; I'm sure someone will jump in here with correct dimensions. You did not mention what kind of rims you have... I would suspect wrong offset if they are late model 6 lugs. Let's see some pix of your truck, and good luck!
1940 Chevy 1/2 ton pickup "KC"
A day without sunshine is like, well, ..... dark!
| | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | It's saying that we need to be signed in to see your pix.
Bill Burmeister
| | | | | Joined: Oct 2010 Posts: 42 New Guy | | New Guy Joined: Oct 2010 Posts: 42 | This is the only picture I have of the rims prior to dismantling the truck and it doesn't show the rears extending beyond the fenders that well. (picture)
Newbie
1950 Chevy 3100 | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Looks like it's got some wide wheels on it, 8" just from what I see. That might be part of what's making it look wide. Does it have an open drive or original style torque tube?
Bill Burmeister
| | | | | Joined: Oct 2010 Posts: 42 New Guy | | New Guy Joined: Oct 2010 Posts: 42 | Open drive, outside diameter (drum to drum) is 65", drums have "fins" on them.
Newbie
1950 Chevy 3100 | | | | | Joined: Jan 2010 Posts: 166 Shop Shark | | Shop Shark Joined: Jan 2010 Posts: 166 | How are the springs attached to the housing? I have a '49 and the previous owner had the original housing but changed the pumpkin to make it an open driveline and also changed the ring and pinion, making it a mix of pre-55 post 55 rear end. For GMC the rear axle should be a H-033 (for either open or closed driveline, the pumpkin change for each case). If originally open driveline, the springs seat should be welded to the housing, if close, the seat should pivot on a bushing resting on two plates welded to the housing. I what you want is ratio, better count your teeth. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Just from the description, I'm inclined to think it might be a '77-'87 K10 rear axle. Does it have a drop out 3rd member in the front, like a 9" Ford? Or is it an integrated carrier type?
Bill Burmeister
| | |
|
|
| |
