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Transmission temp guage

Discussion in 'Chevy Trucks' started by redplow, Nov 18, 2009.

  1. redplow

    redplow Member
    Messages: 32

    I was wondering if anyone is running a transmission temp gauge for plowing. If so is it easy to install and do you have any pics of your install.
  2. erkoehler

    erkoehler PlowSite Veteran
    Messages: 3,279

    My 2500hd has one that was factory installed. Wouldn't plow without one.
  3. Rubicon 327

    Rubicon 327 Senior Member
    Messages: 108

  4. sno commander

    sno commander PlowSite.com Addict
    from ct
    Messages: 1,063

    the best spot for a temp gauge is in the transmision line where it comes out of the t c and before it gets to the cooler, that way you know the exact temps are coming out of your trans, a probe in the pan is ok but you get an overall temp of the fluid after it has been to the cooler. all you need is a double flare set or a couple compression fittngs and a block with a probe.
  5. jb1390

    jb1390 Senior Member
    Messages: 710

    Mine is in the pan, an aftermarket unit from autozone. It works decent, and I think it is one of the better "upgrades" I have made to my truck for plowing. The temps really start to climb when pushing uphill. I drilled a hole in the pan, and welded in a plate that I tapped a hole in.
  6. bocefus78

    bocefus78 Junior Member
    from Indiana
    Messages: 11

    replace the cluster with a 3/4 ton model and you will have a temp guage. Newer models only I believe.
  7. overtime

    overtime Senior Member
    Messages: 153

    Will that work? Would you have to reprogram the cluster?
  8. mkwl

    mkwl 2000 Club Member
    Messages: 2,362

    Same here- helps me keep an "eye" on how hard the truck is working- the more gages the better IMO- my truck has more than just about anyone else in my family's vehicles lol
  9. JDiepstra

    JDiepstra PlowSite.com Addict
    Messages: 1,780

    Factory gauge is nothing but a glorified idiot light. Do you guys know where that sensor is located?
  10. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Sure do....
  11. JDiepstra

    JDiepstra PlowSite.com Addict
    Messages: 1,780

  12. BigLou80

    BigLou80 Senior Member
    Messages: 558

    where is it located ?
  13. Sydenstricker Landscaping

    Sydenstricker Landscaping PlowSite Veteran
    Messages: 3,882

    In the transmission:laughing:
  14. sidthss

    sidthss Senior Member
    from GR MI
    Messages: 182

    couldnt resist!xysport
  15. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    They're integrated into the pressure switch manifold that's attached to the bottom of the valvebody.

    You guys are too much sometimes. :D
  16. mkwl

    mkwl 2000 Club Member
    Messages: 2,362

    What do you think of the factory trans temp gages on these trucks? Are they accurate?
  17. IHI

    IHI Senior Member
    from Iowa
    Messages: 245

    Everybody that i bracket race with runs them since fluid temp plays heavily into how consistant the car is since fluid viscosity affects line pressure and how quickly the valve body reacts to the gear change, etc...plus it's a great tool to monitor tranny issues.

    The super anal guys run 2 trans temp guages to get the full story on what's going on. The best way to do this is with an electric guage and then using 2 sensors and a 3 way toggle...your able to get a 2 for 1 deal. Have one sensor mounted on the output line of the tranny to monitor how hot the tranny is working and how much slippage may be occuring since slippage creates heat and break down the cluthes/tarnished the steels, etc... Then install another sensor in the pan itself, this way you can see exactly what the transmission is getting ready to ingest fluid temp wise.

    Personally, i only run the one in the pan. I could give two chits less what the fluid temp is coming out of the tranny, it will be very hot...that is why it's on it's way to the cooler, it got hot for a reason...it's working, and when auto tranny's work, they create heat through slippage since that's the convertors job. So i want to monitor what is coming back AFTER it's been cooled, i want to see exactly what the stew of fluid being pooled in the pan and going to be sucked back into the tranny is doing. As for installing, VERY fast, very simple install.

    In my car i run a cast aluminum pan, so i just had a bung TIG'd onto it after i drilled the hole. For stamped steel pans they have gaskets that go on the inside of the pan to create a "bulk head" type fitting that you will then thread your temp sensor into.

    Piece of cake, just getting the gumption to get it done is all:) Nother thing, if anybody is having problems with temps going over 180*F it's worth the money to swap over to a full synthetic. I used to run typical Dextron Mercon and once i upped the power and changed convertors it built up heat quicker so i swapped over to full synthetic and dropped an immediate and consistant 15*F on the guage. The typical temp drop when switchign to full sythetic fluid is 15-20*F.
  18. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    On a GM the senders themselves are very accurate, but some gauges themselves not so much, and it's hit or miss on having an accurate one or not. But the good part is when they're off a little it's seldom more than 10 deg or so and it's always higher than the actual running temp. 10 deg is nothing and at least it's showing a warmer temp than it's actually running so there's little fear of cooking the trans from monitoring the gauge reading.

    A minor inaccuracy is far better than having nothing at all. Or only a simple warning light. :nod:
  19. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Agreed and especially so in a bracket car. Running twin (and even triple) senders gives you good incite into the full temp parameters and will tell you how efficient the converter is or isn't since the cooler outlet line is reading fluid temps coming directly from the converter. A little unnecessary on a plow truck :D but very helpful for efficiency and diagnostic purposes. A single sender in the pan is more than enough otherwise.
  20. JDiepstra

    JDiepstra PlowSite.com Addict
    Messages: 1,780

    I'm just asking because I don't know the answer........... does the fluid stay in the trans long enough to reach maximum temperature or is it in and out of there so fast that it has not been able to soak up as much heat as is possible?