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Technical 1955-56 or 57 Chevy steering column

Discussion in 'The Hokey Ass Message Board' started by bustingear, Oct 16, 2019.

  1. bustingear
    Joined: Oct 29, 2002
    Posts: 1,564

    bustingear
    Member

    PICTURES ADDED>>>So I have a couple of columns i got at swap meets. They look like 55-57 to me but question. I pulled the actual steering shaft out of the automatic column and it measures 33.5" long. The bottom end has a female splined end. I tried to put a 3/4 30 male splined end in and it is just a hair to big. I thought it might be 9/16 30 but that is much too small. Can anyone tell me what size the splines are in the bottom of that column? It is a possibility that it may be a 3/4 30 female. If so i was looking for a 3/4 30 spline steering shaft and not having luck...Anyone? Working on my hot rod and as we all know nothing is ever stock.
     

    Attached Files:

    Last edited: Oct 19, 2019
  2. I thought they were connected directly to the steering box via a worm gear.
     
    427 sleeper, Squablow and scotty t like this.
  3. bustingear
    Joined: Oct 29, 2002
    Posts: 1,564

    bustingear
    Member

    yes to box but what size spline?
     
  4. Not sure what you are asking for, there are no splines at the bottom.

    B296B3C1-4B58-4033-B808-3E087081C52A.jpeg
     
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  5. 56sedandelivery
    Joined: Nov 21, 2006
    Posts: 5,751

    56sedandelivery
    ALLIANCE MEMBER

    There you go. The ONLY splines on a 55-57 Chevrolet steering column, are at the top for the steering wheel to bolt on, and at the drop link; neither sound like what you are talking about. Does't sound like a Tri-Five Chevrolet column to me. I am Butch/56sedandelivery.
     
    Last edited: Oct 16, 2019
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  6. 1934coupe
    Joined: Feb 22, 2007
    Posts: 3,405

    1934coupe
    Member

    Busting if you got steering columns with splined ends (opposite of steering wheel) they are not 55-57's . Like Scotty says shaft and box are all one.

    Pat
     
    427 sleeper likes this.
  7. consider this thinking aloud... if the steering shaft has no steering box at the other end, then someone may have cut the steering shaft if they did a 605 power steering box upgrade on their tri-five.. Some people used rag joints to join the shaft to the 605 box, but other options may have been possible.
     
  8. 427 sleeper
    Joined: Mar 8, 2017
    Posts: 611

    427 sleeper
    ALLIANCE MEMBER

    Pic's would help...
    @gotta56forme might be on to something there.
     
  9. Mustang steering box? They are 3/4"- 36.
    [​IMG]
     
  10. 1934coupe
    Joined: Feb 22, 2007
    Posts: 3,405

    1934coupe
    Member

    He says it has a female spline on the shaft and I haven't heard of that configuration on the 605 conversion.

    Pat
     
  11. bustingear
    Joined: Oct 29, 2002
    Posts: 1,564

    bustingear
    Member

    pictures added. I can probably make this work if i can figure out what size those female splines are at bottom and if i can find proper shaft. It measure .70 ID with calipers. Hard to count spline though
     
  12. 1934coupe
    Joined: Feb 22, 2007
    Posts: 3,405

    1934coupe
    Member

    Pictures added? Where?

    Pat
     
  13. bustingear
    Joined: Oct 29, 2002
    Posts: 1,564

    bustingear
    Member

    showing on mine under initial post
     
  14. That's a solid coupler thats been added on. Not stock.
     
  15. You said "it's a hair to big". I'm not understanding if it's the hole or the shaft that's to big. Here's some food for thought. Chrysler used 11/16" - 36 and 13/16" - 36 input shafts on gear box.
     
  16. 1934coupe
    Joined: Feb 22, 2007
    Posts: 3,405

    1934coupe
    Member

    I see them now. Like Johnny Gee says it's a welded on coupler. That column is a 57 there seems to be a bearing missing from the bottom of column though and with that welded on you will have to pull shaft out of column to get one on there=, now that I write this thats how the original went on. In my opinion chalk it up to a learning or cut it off have the shaft splined to a common GM spline put on the lower bearing and you will be good to go. I have attached a Borgenson page. Good luck, Pat
    Home :: Couplers & Adapters
    Couplers & Adapters
    [​IMG]
    Using a 2” straight extension, called a coupler, to extend the steering box, R&P shaft or the column shaft, can sometimes eliminate a universal joint. The coupler can be welded or pinned to the un-splined end of a shaft. The 1”- 48 and 1” DD couplers have a 1-1⁄4” hole that will accept either an adapter to reduce inside diameter to 3/4” smooth or another splined or 3/4” DD coupler. The coupler assembly would have to be pinned and/or welded together. Welding the coupler is acceptable because there are no moving parts to damage, and the coupler’s steel is less susceptible to heat damage from welding. Couplers are available in the same spline and Double D sizes as our universal joints. Couplers and adapters are available in steel and stainless steel only.

    Products

    [​IMG] [​IMG]

    [​IMG] [​IMG]

    [​IMG] [​IMG]
    1DD X 3/4DD

    3/4-36 X 3/4DD

    1"48 X 3/4DD
    Part #: 315249

    Part #: 313449

    Part #: 314349
    $49.60

    $49.60

    $49.60
    [​IMG] [​IMG]

    [​IMG] [​IMG]

    [​IMG] [​IMG]
    3/4-36 X 3/4-36

    9/16-26 X 3/4 Smooth Bore

    5/8-36 X 3/4 Smooth Bore
    Part #: 313434

    Part #: 310900

    Part #: 311800
    $24.62

    $21.55

    $21.55
    [​IMG][​IMG][​IMG] [​IMG]

    [​IMG] [​IMG]

    [​IMG] [​IMG]
    3/4DD X 3/4 Smooth Bore

    3/4DD X 3/4DD

    3/4-36 X 3/4 Smooth Bore
    Part #: 314900

    Part #: 314949

    Part #: 313400
    $21.55

    $24.62

    $21.55
    [​IMG][​IMG][​IMG]Coupler 11/16-36 X 3/4 Smooth Bore

    3/4-30 X 3/4 Smooth Bore

    11/16-40 X 3/4 Smooth Bore
    Part #: 312500

    Part #: 313100

    Part #: 312800
    $21.55

    $21.55

    $21.55
    [​IMG]

    [​IMG][​IMG] Universal Joint Type
    Straight Steel Coupler, 2" Long
    [​IMG] Universal Joint Material
    Natural Steel
    [​IMG] Shaft End 1
    1" Double D
    1"-48 Spline
    11/16"-36 Spline (17mm)
    11/16"-40 Spline
    13/16"-36 Spline
    17MM Double D
    3/4" Double D
    3/4"-30 Spline
    3/4"-36 Spline
    3/4"-48 Spline
     
    Johnny Gee likes this.
  17. ^^^^^ I was searching for the metric one and could not source it. I'm betting the the 17mm-36.

    Edit. 17mm is far to small to be "just a little". 17mm = 0.669". That's .018" under 11/16"
     
    Last edited: Oct 19, 2019
  18. 427 sleeper
    Joined: Mar 8, 2017
    Posts: 611

    427 sleeper
    ALLIANCE MEMBER

    If you're dead set on using a tri five column, forget about the bearing in the lower end of the housing because there wasn't one. The lower end of the mast was clamped and bolted to the firewall on a tri five. You could use a similar set up with a clamp on the bottom and a solid coupler and all should be good to go.
     

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