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saginaw info

Discussion in '40- & 55-Series Tech' started by alf, Feb 10, 2004.

  1. alf

    alf

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    Sorry for the cross posting but not eveyone is cross-pollinated

    Okay guys here is the mother load of info on Saginaw boxes. Happy reading.


    http://www.chevelles.com/techref/ftecref29.html
    http://www.chevelles.com/techref/ftecref29.html
    http://www.chevelles.com/techref/ftecref29.html

    Not sure what is meant by "effort", "t-bar size" or "travel" on the spec
    pages. Is travel the figure we need to use in determining the number of
    turns lock to lock? I do know that AGR's SB2 box that has variable ratio is
    16-13:1.


    Kevin
     
  2. Poser

    Poser Oh...Durka Durka Durka. s-Moderator Supporting Vendor

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    Way to go alf...

    Fantastic info!!!

    Thanks!!

    -Steve
     
  3. alf

    alf

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    I reviewed this info in detail last night and was able to glean some info:

    1. The stearing ratio is the number of degress you rotate the steering wheel to produce a 1 degree rotation in the output shaft. Lower the ratio the quicker the steering.

    2. To determine the number of turns you multiply the ratio by travel by 2 then divide by 360 (r*t*2/360). It appears that the true four turn boxes are 17.5:1 ratio with about 41-43 degrees of travel.

    3. Before 1977 Saginaw boxes had 13/16" 36 spline input shafts. 1977 and later they are 3/4 by 30

    4. Before 1980 they had flare fittings, after they are o-ring.

    5. I believe Effort equates to steering feel. The lower the number the softer the feel. The higher the number the firmer it will feel. This number correlates to the t-bar size as well.

    Casting numbers don't dictate the performance characterisics of the box. So don't be fooled by people saying just go get a box with casting # 5691676 unless it is coming off a vehicle that has the steering characteristics you are looking for.

    If anyone believes otherwise let me know.


    Happy hunting


    ALF