no_6_oh_no

Do you have a 2 wire or 1 wire sensor?

If its a single wire you need to ground the fitting to a good chassis ground or it will not read correctly. The cooler line does not provide enough ground for the gauge to work most of the time.

If its 2 wire check your grounding point for the converter unit.

dslpwr81

It is a two wire and I have it grounded very well. Today, the outside temp was 68 degrees and my stop and go trans temp never got above 130 degrees.

AH64ID

Borrow a laser heat gun and see what the temp is of the line just before the sender....

Spooler

That actually sounds about right. Your ambient temps are low is why. My tranny won't heat up unless it is at least 88 deg. or above. Then it is 140 empty TC locked going down the road. In town is 160 deg. and in stop and go traffic the highest was 170 deg. Towing a heavy load temps run around 155 deg. with ambient temps of 90 deg or so with TC locked up at 70 MPH. I really don't see any issues with your temps.

no_6_oh_no

Temps still sound about 30 degrees low. Typical temps should run within 20 degrees of engine temp when not loaded. Pretty close to engine temp when loaded heavy. The fluid-to-fluid cooler on the block won't even route to the air cooler out front until the fluid temps exceed 140 degrees.

I just did 1300 miles over memorial day in about the same conditions and it was rock steady at 160 locked up. I will see 180-200 in stop-n-go driving depending on the time of year and load. Even with temps in the single digits it never gets much below 150. Pretty much the norm from most I have talked to.

What fitting are you using for the probe? I wonder if the probe is just not far enough into the fluid stream to read the full temp. I made sure I have a good 1/8 inch of the probe into fluid stream and no chance of a thermal block due to no circulation around the probe.

dslpwr81

Well how accurate are the Acu temp adapters from Geno's Garage? That is what I am using. Maybe there not that accurate. I don't know. Even towing, I can't get it hot. I have the Acu temp adapter right after the tranny.

AH64ID

I know you have checked it but it really sounds like its on the wrong line...

no_6_oh_no

In this case I would say not very accurate.

They generally lag 20-30 degrees behind a probe in the line, they don't rise as fast, and they won't see the peak temps becuase the fluid will move thru so fast it can't read it. Same as an IR gun, you are just reading the heat soak on the line and not the true fluid temp.

turfguy

I am having similar problems
I mounted mine where the idiot light sensor goes in the tranny line, & put a resistor on the plug that was there. I haven't seen temps above 100, & been driving a few days. I was using a 12 gauge wire & fig it was too thick for accurate readings. The directions call for a 18 gauge wire so thats what I put in. With my luck Ive had the p[an apart a few times for other problems & if I go cutting lines they'll never seal up properly unless I go pay someone $120 to do it. The threaded bung in the tranny line will have to do for now; what temps should I be seeing by having it in that location?
thanks!

ldzielak

I have my guage in the hot line, I see 130-150 in the highway depending on temps outside, when I'm in stop and go, I'm up 190-210. With stock trany I could hit 220-240 no problem in 2nd or 3rd on gravel roads, when she is not locked up. This is with Double Deep MagH pan.

When I had DTT build my trany I asked them about these temps. They used a laser temp gun at 140 and 200 and agreed my guages were off by over 20 on the top end. So I have a poor calibrated gauge, DTT said don't worry about it and I never have since.

Lee

davelinde

My DiPricol gauge read like that when I had it on the wrong line... (I know, mentioned by others and you checked).

Now, on the right line, mine agrees with an IR thermometer shot of the line and is usually over 140. To spike it up quick, pull a grade slowly with a big load behind you --I pull 13,500# or so and hit 210 in one 30 second pull... then again, it dropped back immediately too. If you don't have anything to pull, run any hill at moderate speed to get TC unlocked. Going up a hill in reverse will do it too. In about 5 minutes you should top 180 or the gauge is not reading correctly I'd say.