GM B-Body Forum, 77-79 Caprice/Impala Forum

Join Now If Your A 1977- 1979 Caprice or Impala owner or other GM B-Body owner!!!
Like us on Facebook https://www.facebook.com/BBodyForum?ref=hl

Join the forum, it's quick and easy

GM B-Body Forum, 77-79 Caprice/Impala Forum

Join Now If Your A 1977- 1979 Caprice or Impala owner or other GM B-Body owner!!!
Like us on Facebook https://www.facebook.com/BBodyForum?ref=hl

GM B-Body Forum, 77-79 Caprice/Impala Forum

Would you like to react to this message? Create an account in a few clicks or log in to continue.
GM B-Body Forum, 77-79 Caprice/Impala Forum

A forum for the owners and enthusiasts of General Motors B-Bodies from 1977-1990, but dedicated to the owners of 1977-1979 Impalas and Caprices. Join up now!


5 posters

    Quick ratio steering box

    78i6belair
    78i6belair
    Active Member (Tier 2)
    Active Member (Tier 2)
    5th Year Anniversary
    Celebrating 5 years of being our member!


    Posts : 54
    Join date : 2014-11-03
    Age : 37

    Quick ratio steering box Empty Quick ratio steering box

    Post  78i6belair Sun Nov 16, 2014 7:00 am

    Hi there.

    I have a 1978 Bel Air sedan with a slow ratio (3.5 turns lock to lock) steering box that I would like to replace with a quick ratio unit(2.5 turns or less). Im aware that the Saginaw 800 series recirculating ball steering box was used in many GM cars and trucks but has anyone found that a particular box from a donor vehicle that works good?

    Thanks.
    Sweet Seventy9
    Sweet Seventy9
    *Senior Moderator*
    *Senior Moderator*
    Helpful and Responsive Member!
    Very active with responding and helping other members with questions and concerns.
    10th Year Anniversary
    10 years of being a member on our forum!


    Posts : 973
    Join date : 2013-11-03
    Location : Upstate NY

    Quick ratio steering box Empty Re: Quick ratio steering box

    Post  Sweet Seventy9 Sun Nov 16, 2014 12:10 pm

    I was just reading about this recently. Grab one out of a 9C1 equipped car, it's a faster ratio.
    slimwud
    slimwud
    Active Member (Tier 2)
    Active Member (Tier 2)
    5th Year Anniversary
    Celebrating 5 years of being our member!


    Posts : 39
    Join date : 2015-02-12

    Quick ratio steering box Empty Steering box

    Post  slimwud Wed May 20, 2020 8:08 pm

    Hello I have a 78 coupe my stock powersteering box is leaking and in need of replacement. I saw this post but will my lines still work on the 96 steering box? Are they both standard or is one metric? Are the spline for steering link the same as well. I have a youtube channel cfmechanic. Car is modified stroker motor stereo efi etc. I looked up on autozone first and a replacement is $770 pepboys said theres is 670 but i could get a deal and have it for $440. I have also been told a quick ratio won't be good on the street or drag strip is this true?
    Kit1078
    Kit1078
    Freshman Member (Tier 3)
    Freshman Member (Tier 3)
    5th Year Anniversary
    Celebrating 5 years of being our member!


    Posts : 106
    Join date : 2015-04-26
    Location : Northeast Ohio

    Quick ratio steering box Empty Re: Quick ratio steering box

    Post  Kit1078 Sun Jun 07, 2020 9:37 pm

    There are a few cars with the 2.5 turns lock to lock gearbox. The F41 package came with that, and I believe it was standard on the 1994-1996 Impala SS, as well as the 9C1 package.

    The best way to tell if it is a 2.5 turn lock to lock gearbox is to look at the splines on the pitman arm. The pitman arm has a 'key' (spot with a wider spline/missing spline so that the pitman arm can be lined up properly on the gearbox shaft) The 3.5 turn 'key' is only 1 spline width, the 2.5 turn has a 'key' that is 2 splines. (also, a 2.5 turn pitman arm will not fit onto a 3.5 turn gearbox, but you can use a 3.5 turn pitman arm on a 2.5 turn gearbox)

    Here's a good article on the subject:

    https://www.hotrod.com/articles/ccrp-0901-gm-steering-box-upgrade/
    Kit1078
    Kit1078
    Freshman Member (Tier 3)
    Freshman Member (Tier 3)
    5th Year Anniversary
    Celebrating 5 years of being our member!


    Posts : 106
    Join date : 2015-04-26
    Location : Northeast Ohio

    Quick ratio steering box Empty Re: Quick ratio steering box

    Post  Kit1078 Sun Jun 07, 2020 9:40 pm

    at some point in the early 80's, I think, they switched from standard inverted flare to metric o-ring fittings. The pressure line should be an 18mmX1.5 and the return should be 16mmX1.5, but I'm not 100% sure since it's been a couple years since I swapped my gearbox over. And I ran all new lines since I was changing over to a GM type 2 power steering pump.

    slimwud wrote:Hello I have a 78 coupe my stock powersteering box is leaking and in need of replacement. I saw this post but will my lines still work on the 96 steering box? Are they both standard or is one metric? Are the spline for steering link the same as well. I have a youtube channel cfmechanic. Car is modified stroker motor stereo efi etc. I looked up on autozone first and a replacement is $770 pepboys said theres is 670 but i could get a deal and have it for $440. I have also been told a quick ratio won't be good on the street or drag strip is this true?
    avatar
    Petegresser
    Active Member (Tier 2)
    Active Member (Tier 2)
    5th Year Anniversary
    Celebrating 5 years of being our member!


    Posts : 15
    Join date : 2018-02-26

    Quick ratio steering box Empty Re: Quick ratio steering box

    Post  Petegresser Tue Jun 16, 2020 8:06 am

    Hi, I bought. 12-1 quick ratio for my 78 Olds Coupe and recommend it for anything other than Bonneville.
    Believe that is what comes in the SS

    Sponsored content


    Quick ratio steering box Empty Re: Quick ratio steering box

    Post  Sponsored content


      Current date/time is Sun Jun 23, 2024 12:56 pm