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Jul 21st, 2025 | | | | Joined: Aug 2022 Posts: 100 'Bolter | | 'Bolter Joined: Aug 2022 Posts: 100 | Can you change a stock 1946 1/2 ton enclosed drive center chunk / pumpkin with a 1955 1st series differential chunk / pumpkin…..and use the open drive shaft? I thought I had read that some where. Using the original 1946 axle / differential housing?
Last edited by Dltalfa; 06/15/2024 12:11 AM.
Care taker of a 1946 1/2 ton. Pretty much period correct original. Danny T, from B’ham, Al
| | | | | Joined: Aug 2005 Posts: 270 'Bolter | | 'Bolter Joined: Aug 2005 Posts: 270 | Yes. I'm using one from a 57 in a 40. Good up through 62? if memory serves me.
Last edited by Donf; 06/15/2024 3:13 PM.
| | | | | Joined: Aug 2022 Posts: 100 'Bolter | | 'Bolter Joined: Aug 2022 Posts: 100 | Yes. I'm using one from a 57 in a 40. Good up through 62? if memory serves me. So you’re using just the ‘57 pumpkin and drive shaft, and retaining the original differential housing and axles, is that correct……to eliminate the torque tube. Correct??
Care taker of a 1946 1/2 ton. Pretty much period correct original. Danny T, from B’ham, Al
| | | | | Joined: May 2015 Posts: 9,830 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 9,830 | If you put an open driveline on a torque tube axle housing, you need to do something to eliminate the pivot mounts on the axle housing. Either cut them off and weld on spring pads, paying attention to driveline angles, or set the driveline angle and weld the pivots solid, which might be a little messy when the rubber in it starts melting. With the torque tube gone, you need something to resist the torque (springs or so-called traction bars.)
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | | | | Joined: Aug 2005 Posts: 270 'Bolter | | 'Bolter Joined: Aug 2005 Posts: 270 | "So you’re using just the ‘57 pumpkin and drive shaft, and retaining the original differential housing and axles, is that correct……to eliminate the torque tube. Correct??"
Correct, except for the drive shaft. You are now entering the world of custom made or modified driveshafts (length).
Klhansen is correct about setting the driveline angle and welding the pivots solid, except I don't believe the pivots on your 46 contain rubber. No mess, set the angle and weld. | | |
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