Putting a '62 401 in my 55 Special

Discussion in ''Da Nailhead' started by BuickSpecial41, Jan 2, 2019.

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  1. BuickSpecial41

    BuickSpecial41 Active Member

    Hey guys, long time no see. I have an update. I bought a rebuilt 401 with a thumper cam for my 1955 Special. (It was a sweet deal that I could not pass up.) It came with the original transmission. Apparently they both came out of a 62 Electra originally. Anyway, I'm trying to research everything I will need to do to swap the old 264 block out and keep the torque tube drive shaft. I have a 56 dynaflow but I was wondering if the 62 transmission can even be used with my setup. I'm really early on in my research for this so any direction and forum links would be much appreciated. I'm trying to search it out on the forum but I'm not sure where to start. Any ideas?
     
    bhambulldog likes this.
  2. BuickSpecial41

    BuickSpecial41 Active Member

    I need to add that I also have the 55 dynaflow that came in my car. I'm planning to rebuild one of the transmissions just to freshen it up. I have a '56 322 that came with the car but obviously the 401 trumps that one. So I have three different transmissions, not sure what condition any of them are inside but it doesn't matter because I'm going to refresh them anyway. I rebuilt a 4T60E in automotive school so hopefully this one won't be as difficult. The whole reason for doing this project is to learn so I'm not scared of it. I just want to do the right thing. I have manuals for the 55, 56, and 62 Buicks so between all of them I should have specs covered. I want to keep the original driveline to the rear if possible. I like the uniqueness of my car and I'm excited to keep it a cruiser.
     
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  3. BuickSpecial41

    BuickSpecial41 Active Member

    I also want to put sparkplugs in the tailpipes to have flamethrowers.
     
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  4. bhambulldog

    bhambulldog 1955 76-RoadmasterRiviera

    Hello Ray,
    I don't have the answers for you. The guys that do will answer your questions before long. I'm interested in the answers, so I subscribed to this thread/
     
  5. bhambulldog

    bhambulldog 1955 76-RoadmasterRiviera

    that'll be cool !
     
  6. John Codman

    John Codman Platinum Level Contributor

    You probably already know this, but the '62 401 won't bolt to the '55 or the '56 tranny. The '62 is a Dynaflow engine, so your best bet is to use an earlier torque-tube Dynaflow. As I recall, the last torque-tube Dynaflow was 1960. Any '57 to '60 Nailhead Dynaflow should bolt to your engine. Perhaps someone a bit more familiar with this type of swap can help you with the later Dynaflow to earlier torque-tube hookup. I don't know about Transmission length, torque ball interchange and so on.
     
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  7. BuickSpecial41

    BuickSpecial41 Active Member

    I was hoping to find an adapter setup to bolt it up. But I may have to go the route you're suggesting. I'll look into it. Thanks!
     
  8. BuickSpecial41

    BuickSpecial41 Active Member

    Also a correction on the original car. The original car the 401 came out of was a 62' LeSabre
     
  9. John Codman

    John Codman Platinum Level Contributor

    Externally, all 401s are the same; the LeSabre engine normally has lower compression then the Invicta and Electra.
     
    BuickSpecial41 likes this.

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