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Does anyone use a trans temp guage ?



Fivefingerdeathpunch said:
Trans temp is really not needed on 97-03 cars, I've never seen mine reach past 190 even after hours on the freeway.
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why is not needed on 97-03 cars?? is there something im unaware of? ha i know the 05-08 gxps have the most issues with overheating the trans but I think its a nice feature to have and a good thing to keep tabs on in every car
 


Fivefingerdeathpunch said:
Trans temp is really not needed on 97-03 cars, I've never seen mine reach past 190 even after hours on the freeway.
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You also live in Minnesota. Highway driving isn't whats hard on trans temps. Its constant shifting on windy, hilly roads. I've seen my trans temp over 220* on a few occassions, and never on the highway.
 
From everything I've seen on thie website and others, the 97-03 cars never seem to have high trans temps compared to 04+ cars. For whatever reason 04+ cars can't cool aswell from either a lack of air flow over/under the trans, smaller cooler. GXP's transfer the engine heat into the trans aswell as having a huge oil pan, which stops alot of air flow to the trans case under the car.

Personally I would see where your trans temps are currenty at before you invested in a cooler. Also 220 is not really hot either, might be 10-15º over normal, but a trans running at 175-205ish should have a fluid life of atleast 50,000 miles.

Even after beating on my car during tuning session in the summer, the trans maybe got within 10-15º of coolant temp.
 
What temp is most transmission fluid rated for until it starts to break down. I was told before that 175* was a point were it starts to break down but i know thats crock
 
A chart taken from the internet, just about every chart you see is a little different, but most are close to this. I would never run the fluid past 50-60k anyway.

FluidChart.jpg
 
Here are two (coldest and hottest) readings for my transmission.....

January 18, 2013, 29*:
- Coolant @ 183*
- Trans @ 145*


August 29, 2012, 70*:
- Coolant @ 206*
- Trans @ 194*


The car drives so much nicer right now, with the cooler running tranny. My drive to and from work is 30-40 minutes and 90% highway (cruising at 50-60mph). If I head for the hills or a long trip, she's gonna get real hot and not be happy with a 4-6 hour windy/twisty/uppy/downy highway day. A trans cooler is a must in these scenarios.
 


My Comp G shows the trans temp in the DIC, before I got my tune it crept up around 200-210 during the summer.

After I put the tune in though, I dont know if it's because of the higher line pressures, or different shifting, or maybe just the fans automatically kick on around 194*, but I havnt seen it get above 180 since.
 
In my 04 GT, the highest i saw was 228. The coolant was around 210-215, outside temp was 97* and i had been in stop/go city traffic for about 90 minutes. I had been on the highway for about 6 hours before hitting the city traffic.

On the highway my winter/summer average trans temps are 145/180 city between 160 and 210 year round, again depending on how much i am demanding from the car.
 
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