Lee21490 Posted January 25, 2016 Share Posted January 25, 2016 So I've been running this Trans temp gauge for the last 1.5+ Years ish. http://www.amazon.com/Auto-Meter-5757-Transmission-Temperature/dp/B0002M722A In the last month, it would randomly read 250+ & then after awhile pop back down to the normal temp range. Last couple days its been stuck 250+ It seems like when i turn on the key, It STARTS at 250F Like it was 100f(Start of the gauge) & Then as the temps go up, it moves BEYOND 250. I've triple checked all the wires running to the sender & Gauge now, Re-did the ground on the sender & the gauge. Still not working properly. Gauges aren't really my forte, So if someone could point me in the right direction I'd really appreciate it. Possible bad sender? Hope its not a bad gauge :/ Link to comment Share on other sites More sharing options...
ParadiseMJ Posted January 25, 2016 Share Posted January 25, 2016 How is it grounded? Where did you plumb it! These are symptoms of a sender that hasn't been installed properly. Mine usually runs 150 on the road, only rises in temp when I'm low & slow or when I'm carrying or towing a load up a hill. Link to comment Share on other sites More sharing options...
Lee21490 Posted January 25, 2016 Author Share Posted January 25, 2016 How is it grounded? Where did you plumb it! These are symptoms of a sender that hasn't been installed properly. Mine usually runs 150 on the road, only rises in temp when I'm low & slow or when I'm carrying or towing a load up a hill. It's been working for over a year fine. The Sender is hooked into the return line from the trans cooler (Aftermarket) & is grounded to a bolt near the sender. Same with the Gauge. I've re-wired the ground already thinking that was the issue, DIdnt help. Link to comment Share on other sites More sharing options...
HOrnbrod Posted January 25, 2016 Share Posted January 25, 2016 Is this the sensor you are using? Autometer #2259? How is it plumbed to the return line from the trans cooler? Saddle clamp? On a "T" fitting? Link to comment Share on other sites More sharing options...
Lee21490 Posted January 25, 2016 Author Share Posted January 25, 2016 Is this the sensor you are using? Autometer #2259? How is it plumbed to the return line from the trans cooler? Saddle clamp? On a "T" fitting? T'd into the rubber line. Link to comment Share on other sites More sharing options...
HOrnbrod Posted January 25, 2016 Share Posted January 25, 2016 So how did you ground the body of the sensor on a rubber line? http://comancheclub.com/topic/39788-help-with-trans-temp-sensor/?hl=rubber&do=findComment&comment=400451 Link to comment Share on other sites More sharing options...
Lee21490 Posted January 25, 2016 Author Share Posted January 25, 2016 So how did you ground the body of the sensor on a rubber line? http://comancheclub.com/topic/39788-help-with-trans-temp-sensor/?hl=rubber&do=findComment&comment=400451 Hose clamp & a wire. Ghetto as $#!&, But it works lol Link to comment Share on other sites More sharing options...
HOrnbrod Posted January 25, 2016 Share Posted January 25, 2016 Sounds like you are grounded okay. I'd do a quick test of the thermister (sensor) to see if the resistance changes. Hopefully it's that and not the gauge itself. http://www.ehow.com/how_5398454_test-thermistor.html Link to comment Share on other sites More sharing options...
Lee21490 Posted January 25, 2016 Author Share Posted January 25, 2016 Sounds like you are grounded okay. I'd do a quick test of the thermister (sensor) to see if the resistance changes. Hopefully it's that and not the gauge itself. http://www.ehow.com/how_5398454_test-thermistor.html Will do! Thanks for the linked guide. Link to comment Share on other sites More sharing options...
Lee21490 Posted February 10, 2016 Author Share Posted February 10, 2016 Well i finally got around to pulling the sensor & Testing it. I get 1.5ohms at room temp, And it was steadily going down to 1.2 ohms with i touched it to the electric stove on low. I'm not sure what Ohms its supposed to start at, But seems to be working properly?Maybe its the gauge? It seems to work properly just starts at 250f :/ Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 11, 2016 Share Posted February 11, 2016 1.5 to 1.2 ohms? .3 ohms? You can get a change in resistance like from a speck of dust on the probe. No way that's correct. A normal temp gauge sensor varies about 100 ohms or more over the temp range. Link to comment Share on other sites More sharing options...
Lee21490 Posted February 11, 2016 Author Share Posted February 11, 2016 1.5 to 1.2 ohms? .3 ohms? You can get a change in resistance like from a speck of dust on the probe. No way that's correct. A normal temp gauge sensor varies about 100 ohms or more over the temp range. The Gauge also reads right around 210~ If i unplug the sensor wire. Not sure if thats correct either. Maybe I'm reading this meter wrong. Its set to 20k ohm, as the rest just say 1. So is that 1.5k or just 1.5 Link to comment Share on other sites More sharing options...
Eagle Posted February 11, 2016 Share Posted February 11, 2016 If the expected resistance is around 100 ohms, why are you using the 20,000 ohms range? Don't you have a 0-2,000 or 0-200 ohms range? Link to comment Share on other sites More sharing options...
Lee21490 Posted February 11, 2016 Author Share Posted February 11, 2016 If the expected resistance is around 100 ohms, why are you using the 20,000 ohms range? Don't you have a 0-2,000 or 0-200 ohms range? Because it was reading 1 on the other settings. Link to comment Share on other sites More sharing options...
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