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

A forum for all the owners and enthusiasts of General Motors B-Bodies from 1965-1996, but dedicated to the owners of 1977-1979 Impalas and Caprices. Join up now!


    speedo correction?

    Share
    avatar
    terry cronk
    Auto Enthusiast
    Auto Enthusiast

    Posts : 172
    Join date : 2015-08-19
    Age : 70
    Location : Mid-Michigan

    speedo correction?

    Post  terry cronk on Thu Jun 09, 2016 9:21 am

    I changed over my rear axle from 2.41 to 3.73. Now I have no accurate speed available.

    I purchased the larger speedo drive housing and the 2 inch housing plug. I have a couple of larger gears to be used.

    But what about the output shaft gear? With 28 tall tires and 3.73 gears, what's my choice?

    Any help here.
    avatar
    terry cronk
    Auto Enthusiast
    Auto Enthusiast

    Posts : 172
    Join date : 2015-08-19
    Age : 70
    Location : Mid-Michigan

    speedo correction

    Post  terry cronk on Thu Jun 16, 2016 9:39 am

    This site has all the information on what combo of drive/driven gears for our 350/700R4/400 Transmission
    when we have gear changes.  This is for the 2 inch speedo housing on turbo 350 and the other transmissions.
    :-)

    http://www.73-87.com/7387garage/drivetrain/speedo.htm

      Current date/time is Thu Aug 24, 2017 2:57 am