tachometer

Discussion in 'Sparky's corner' started by Gold GS, Sep 27, 2018.

  1. Gold GS

    Gold GS Well-Known Member

    I would like to install an in-dash tachometer in my 72 GS 350. The car never had one. What parts would I need? Can I use my stock distributor?
     
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    Reproduction Tachometer? It bolts right in. Just wiring.
     
  3. Gold GS

    Gold GS Well-Known Member

    It's going to be an original rebuilt one. Does it get wired to the distributor? Will I need a tach adapter? I don't know if these are stupid questions or not, but I'm clueless with these.
     
  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    There is only one wire from the tachometer to the - side of the coil. The tachometer case is grounded to the dash. That's it.
     
    Gold GS likes this.
  5. Gold GS

    Gold GS Well-Known Member

    Thank you Larry, I can't even begin to tell you how helpful you have been with my first build. I really appreciate all the help you have given me.
     
  6. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD"

    You’re welcome, my pleasure.
     
  7. rkammer

    rkammer '71 GS455 Arctic White

    Just to add a bit to what Larry has already said regarding the ground at the dash. There should be a flat ground strap that connects one of the mounting studs for the tach to the stud on the gauge next door (the speedo). Make sure that strap is still there and that the case of the tach you are installing is not painted where it mounts to the dash. If it is, you should scrape off the paint so that bare metal of the case makes contact with the ground strap.
     
  8. Gold GS

    Gold GS Well-Known Member

    Thank you rammer.
     
  9. gstewart

    gstewart Well-Known Member

    I can tell that it is an advantage if u have small hands & skinny arms. There is not much room. Now, if u remove the dash pad, then lots of room.
     
  10. Gold GS

    Gold GS Well-Known Member

    Thanks gstewart, I was going to ask a friend to help me. He is a very small person, maybe he could get his hands in there.
     
  11. rkammer

    rkammer '71 GS455 Arctic White

    The dash pad isn't as hard to remove as you might think. Remove the glove box insides, the dash pad, the filler panel below the steering column, and disconnect the gear indicator from the steering column. Then loosen the two 9/16 nuts that hold the steering column up and lower it as much as possible without removing nuts. Then, remove the Phillips screws (I think there 8) that hold the cluster in and pull it back as much as you can without having to remove the speedo cable. This should give you plenty of room to remove the clock or delete plate and install the tach. Takes 1 to 2 hours without any issues. These instructions are also in the chassis manual.
     
    Last edited: Oct 2, 2018
  12. Gold GS

    Gold GS Well-Known Member

    Thanks again. Hopefully we can get it without removing the dash but I'll keep your instructions just in case. I appreciate your help.
     
  13. Steve Craig

    Steve Craig Gold Level Contributor

    Remember........there's always another dash pad nut you might forget. I have experience in the "forget & break the dash pad dept. ".
    Another option is to simple remove the radio to provide access. You'll also have a couple spare light sockets in the area for use with the tach. or a clock. Chassis Manual can help with bulb sizes.
     
  14. Gold GS

    Gold GS Well-Known Member

    Thanks Steve, I have factory air in the car, will the duct work get in the way?
     

Share This Page