I took my C5 through the Arizona mountains and I was driving around normally. I was NOT driving the car hard. The DIC showed the transmission temperature to be 234 degrees.

Is this OK??

:confused:

 

I think the warning message will appear when your tranny temps hit 260. You were safely under that - but on the warm side. The hotter the air temps, the warmer the tranny will run. I'm guessing being in the mountains in Arizona heat will cause your 234 number. Just make sure your front radiator is free of any debris that might be blocking airflow.

Since you live in AZ, you might consider getting a tranny cooler. Just piece of mind for those 110 degree days!


[Modified by davette, 5:01 PM 3/22/2004]


[Modified by davette, 5:03 PM 3/22/2004]

 

I would install a tranny cooler, my temp usually run around 192 in 90 degree heat.

 

The vehicle already has a factory transmission cooler. Do you have an aftermarket cooler installed? What is a good one to get?

 

Yes, the factory tranny cooler does an OK job but may not be the best for warmer climates. Your best bet is to add a small second unit inline with the factory unit. You would have two units working to cool the fluid. With two units, you would probably never go above 200 degrees in the desert heat going up a hill.

Go to this webpage:
http://www.bmracing.com/products/acc...perCooler.html

I would say for AZ heat, the 24,000 BTU unit would be best for you!
Easy to install.

Good Luck!

 

I would install a tranny cooler, and a 160 thermostat that will keep your temps down thats what I did


QUIMBO :seeya :seeya :seeya SEEYAAAH

 

234 is definitely on the warm side. What gear differential and torque converter do you have? If you go to a lower gear and/or higher stall torque converter, it will run warmer.

With a stock 2.73 and tc, I was around 175 for casual highway driving.

Soon, I'll get my vette back from the shop with a 3.73 and a 3500 stall torque converter, but I also upgraded to a BeCool radiator, 160 degree thermostat, and a separate B&M tranny cooler. I'm not sure what that will do to the tranny fluid temperature, yet.

 

Sounds like it is time for some liquid tranny cooler...Amsoil ATF. 12 quarts of it, to your door.


Resists Oxidation and Thermal Degradation

AMSOIL ATF resists thermal and oxidative degradation up to three to five times longer than conventional transmission fluids do. It protects clutches, planetary gears, valves, pumps and seals from damaging sludge and varnish deposits. AMSOIL ATF helps prevent component overheating and ensures cooler, smoother transmission operation.

SERVICE LIFE

AMSOIL ATF has an expected fluid life of three times the automatic transmission manufacturer's recommendations. Drain intervals may be extended indefinitely when fluid analysis is used.

Recommended for applications requiring the following specifications:

GM; Dexron II, Dexron III (GM 6297M, 6417M)
Ford; Mercon, Mercon V
Chrysler; ATF+ through ATF+4
Allison; C-3 & C-4
Caterpillar; TO-2 & TO-3
Voith G1363
ZF; TW-ML-14C
Honda; Z-1
Mitsubishi Diamond SP II & III
GM Strasbourg (European Imports) and Opel
Toyota; Type T and T-IV
Vickers I 286S & M2950S


TYPICAL TECHNICAL PROPERTIES

AMSOIL 100% Synthetic Automatic Transmission Fluid (ATF)

Kinematic Viscosity @ 100°C, cSt (ASTM D-445)
7.5

Kinematic Viscosity @ 40°C, cSt (ASTM D-445)
36.0

Viscosity Index (ASTM D-2270)
182

Noack Volatility, % weight loss (DIN 51581) 10.8

Flash Point °C (°F) (ASTM D 92) 222 (432)

Pour Point °C (°F) (ASTM D 97)
-56 (-69)

Four Ball Wear Test (ASTM D 4172B: 40 kg, 75°C, 1200 rpm, 1 hour, Scar in mm) 0.40

Brookfield Viscosity (cP) -10°C = 465

Brookfield Viscosity (cP) -20°C = 1030

Brookfield Viscosity (cP) -30°C = 2505

Brookfield Viscosity (cP) -40°C = 7150




[Modified by IMQUIK, 11:18 AM 3/23/2004]

 

Tranny cooler is a big must for any spirited driving. I used to hit those higher numbers but now about 170 on the highway, and around 190 at autocross events. :thumbs:

 

:iagree:

 

:iagree: I'm no tranny expert, but FWIW, I talked to a transmission mechanic once, and he told me that anything over 190' will significantly shorten the life of your automatic transmission. :cheers:

 

One week ago I got transmission temp warning message on the DIC of my A4, 3.15
outside temp 70
Oiltemp 246
transm.-temp 237
driving in 3rd gear at 5.500 rpm for about 5 minutes on autobahn

just for your info
Frederik