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gmc th400 trans temp gauge

Discussion in 'Chevy Trucks' started by wva, May 21, 2013.

  1. wva

    wva Member
    Messages: 78

    :salute:Hi all so I have '89 Gmc 2500 I want to put a trans temp gauge in. I would like to know the best place to put the sender it's 1/8" pipe thread. Elsewhere I have read to use the pressure test port on the left side, or should I put a inline manifold , or a bung in pan. I plow and tow with this so want to do what I cam to keep it going strong.

    thanks in advance Richard. salute:
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,739

    Here's an idea. How about after the cooler?
  3. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    I believe the test port provides the best all around number. Temperature of the fluid varies widely.

    Hottest going into the cooler, which is a good number to know for peak fluid temp.

    Coolest coming out of the cooler. That will tell you how well the cooler is working. Also a good number to know.

    But the test port will give an overall indicator of the temperature situation.
  4. wva

    wva Member
    Messages: 78

    Thank was for your reply. Test port it is. Would of been back sooner been camping.

    :salute: to all the Vets Thanks for your service