1. If you have recently registered with a gmail email address, you must contact me, as gmail will not forward our confirmation email to you. Contact me and jim@trishieldperformance.com to complete your registration.
    Dismiss Notice
  2. In and effort to reduce the spam on the site, several years ago I had went to a program where I manually approve each and every new registration. This approval gives you full access to the site, to pictures, and to post, among other things. To be able to enjoy the full potential of the board for you, you need to be fully registered.. and that's easy.. Just send an email to me at jim@trishieldperformance.com and I will verify your registration. This policy will remain in effect indefinitely, as it has completely eliminated the bad actors from our site, who would spam and hack it, once they gained access. Thanks JW
    Dismiss Notice
  3. The "Group Buy" for the 1967-68 Deluxe Steering wheel recasting is now officially "Open". Now is the time to start sending in the wheels. The latest date that the wheels must be received by Kochs is 31 March 2025 The cost for each wheel is $750. The only "up front cost" is your shipping the wheel. If you send in more than one wheel, each additional wheel will cost $700. Shipping and insurance to Kochs and return shipping will be extra. You will be contacted by Teresa to make payment for the wheel(s) and return shipping and insurance when your wheel(s) is complete. The shipping will be factored on your delivery address and insurance. I will be sending the contact information all of you have sent me to Teresa at Kochs. Send in your wheels, horn pad and hardware and paint color sample if applicable. Please include: First and Last Name Shipping Address Phone number email address V8Buick "Member Name" Wheel Color (SEE THE BOTTOM FOR WHEEL COLOR) Pease read the "shipping to Kochs" below. There are two addresses. One for USPS Mailing One for FedEx and UPS shipping You can use USPS/Mail, UPS or FedEx to send in your core. Use the appropriate address depending on what service you use to ship. If you use USPS/Mail ship to: Koch's P.O. Box 959 Acton, CA 93510 Attn: Teresa If you use UPS or FedEx ship to: Koch's 7650 Soledad Canyon Road Acton CA 93510 Attn: Teresa Kochs Contact: Teresa (661) 268-1341 customerservice@kochs.com Wheel Color If you wheel is Black, you can list that in your information you send in with your wheel. For colored wheels, please contact Teresa about specifics for wheel color if you do not send in a color sample to match. Please contact me if you have any questions. Thank you to everyone for your participation in making this a reality. And "Thank You" Jim Weise, for allowing and facilitating this project! Michael .................... to remove this notice, click the X in the upper RH corner of this message box
    Dismiss Notice
New users Registered with a gmail address Attention All new Users 67-68 Deluxe Steering wheel recast Group buy

Speedo Gears

Discussion in 'Got gears?' started by Beamer, Oct 23, 2004.

  1. Beamer

    Beamer Suncoupes Rule !!!

    I am currently running a pegleg 2.56 rear. I believe the speedo is correct, and I can verify soon with my GPS. Does anyone have a table or some type of chart that will tell me which speedo gear I will need for a 3.90 gear rear to have an accurate speedo?

    I know I will need to find out the current gear spline count.

    Thanks any and all...

    Mike

    :TU:
     
    Beamer, Oct 23, 2004
    #1
  2. 70 gsconvt

    70 gsconvt Silver Level contributor

    Here's a shop that sells everything you'll need at reasonable prices. You could also probably try a local tranny shop. They should have a box or two of this stuff. Look for a shop with old guys and lots of greasy stuff laying everywhere.

    http://www.transmissioncenter.net/speedometer_calibration_______va.htm

    Here's a chart that shows what you probably have in there now:

    http://www.teufert.net/speedo/70-400-gt.htm

    Finally, here are two pages that should help you pick the right speedo gear based on new rear end gear and tire size:

    http://www.chevymania.com/tech/speedo.htm

    http://www.jeeptech.com/javaAps/Speedo.html
     
    70 gsconvt, Oct 24, 2004
    #2
  3. Beamer

    Beamer Suncoupes Rule !!!

    Thx Phillip,

    I will look it all over and probably pull the gear out today to verify. I am going out here in a few minutes to check the speedo to my GPS for accuracy.

    I appreciate the links and all...

    Mike
     
    Beamer, Oct 24, 2004
    #3
  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Mike,
    This is real simple. All you need to know is your rear gear ratio, tire diameter, and the # of teeth on the speedo drive gear. The drive gear is located on the output shaft of the trans. When you pop the sleeve and driven gear out, you can count the # of teeth on the drive gear by rotating the drive shaft(wheels off the ground, trans in neutral). Then just plug the #'s in to the calculator here:

    http://www.tciauto.com/tech_info/speedo_gears.htm

    and it will tell you the # of teeth you need for your driven gear.
     
    LARRY70GS, Oct 24, 2004
    #4
  5. John Eberly

    John Eberly Well-Known Member

    Easy to figure out, can be hard to fix

    Some of the speedo output shaft gears are pressed on. They can be REALLY hard to remove. I gave up and had a tranny shop swap mine, and they had to get a new puller after they broke the one they had!

    I was told (after I put on a new steel gear) that there are nylon type gears that are held on by a metal clip. This is the smart way to go if you're changing gears - then you won't have to deal with the pressed on gear again.
     
    John Eberly, Oct 29, 2004
    #5
  6. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    I agree John, but he may not need to swap out the drive gear. I originally thought I had an 18 tooth gear in my 67 ST-400. When I counted the teeth, it was only 17 teeth. Had it been 18, I would have had to swap it out because there was no driven gear that would work with my combination. Put the #'s into the TCI calculator. If the driven gear box comes up N/A, you have a problem, and need to change the gear.
     
    LARRY70GS, Oct 30, 2004
    #6

Share This Page