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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!
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| | | | Joined: Mar 2022 Posts: 37 'Bolter | | 'Bolter Joined: Mar 2022 Posts: 37 | i have a 1950 chevy, and the 2 speed rear differential looks like a timken, but according to this site (an old thread) the timken axle had bolted on axle shafts, and corporate axles had double splined shafts. mine has the splined outer shafts. but the pumpkin is very square, and has timken cast into the side. so what's up? anyone have a manual that shwos the different axles? | | | | | Joined: Jan 2008 Posts: 4,962 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,962 | The wheel ends don't necessarily determine the third member. Here are parts diagrams. The C part numbers are Timken. The B part numbers are GM Corporate. https://photos.app.goo.gl/fzyUp1Bu9P8bdHWr7 | | | | | Joined: Mar 2022 Posts: 37 'Bolter | | 'Bolter Joined: Mar 2022 Posts: 37 | but would a corporate housing and axles be compatible with a timken 3rd? | | | | | Joined: Sep 2011 Posts: 1,458 'Bolter | | 'Bolter Joined: Sep 2011 Posts: 1,458 | No.
From what I've seen corporate axles had vacuum shift vs electric 2spd shift on 0thers.
BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022
| | | | | Joined: Mar 2022 Posts: 37 'Bolter | | 'Bolter Joined: Mar 2022 Posts: 37 | No.
From what I've seen corporate axles had vacuum shift vs electric 2spd shift on 0thers. this has vacuum. | | | | | Joined: Jan 2008 Posts: 4,962 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,962 | A Timken rear will not fit in a housing built for a Corporate rear, but Timken and Eaton both built housings for both and wheel ends could be specced. This GMC has a vacuum shift Timken. https://photos.app.goo.gl/xmKDnJBj2vBgPTFe7I was a licensed salvage dealer for many years. Trucks don't always have what came from the factory and two tons could be specced with various componants. Sometimes you have to just take them apart and see what you have. https://photos.app.goo.gl/EDNt6enVJkfzCpTL6 | | | | | Joined: Mar 2022 Posts: 37 'Bolter | | 'Bolter Joined: Mar 2022 Posts: 37 | are there electric shift units available for the timken axle, or do i need to try to got the vacuum unit working? | | | | | Joined: Jan 2008 Posts: 4,962 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,962 | I don't think electric was ever offered with that Timken. But I think the Timken has a bolted together chamber that the diaphragm can be changed. | | | | | Joined: Mar 2022 Posts: 37 'Bolter | | 'Bolter Joined: Mar 2022 Posts: 37 | I don't think electric was ever offered with that Timken. But I think the Timken has a bolted together chamber that the diaphragm can be changed. that is correct, but is there a source for a new diaphragm? | | |
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