transmission temps
Drifting
Joined: Apr 2007
Posts: 1,760
Likes: 4
From: Broward County Florida
I was going to say "someone needs an oil cooler!" 
Last edited by DevilMan02; Jun 10, 2009 at 04:06 PM.
Racer
Joined: Apr 1999
Posts: 370
Likes: 1
From: Taylors sc
RTI Fluid excanger!!!
Then hit the 4-8-12-16-20 quart button and it will pull the old coming out and replace to the pan with new...... Using the car running with the trans pump for the infusion...Totally safe and you can exchange until it is clear in the sight glasses... Very cool and we havent lost a tranny yet... If new flluid will hurt it then should we never change the fluid, that wouldnt make sense would it. I can agree with the varnish, but we scrutinize the condition of thwe trans and of course the mileage.....Just my .02 Plus im in on the tranny temps......
Pro
Joined: Feb 2006
Posts: 647
Likes: 2
From: Keystone, I.T.
Mine will run within a couple of degrees of the water temp. in the summertime. I went up to the bi-plane fly in at Bartlesville last Saturday and it was a warm 91 degrees and the trans. temp got up to between 196-201, same as water temp.. I am stock everything with an A4 transmission. I will tell you this if the transmission temperature ever gets to or exceeds 250 you will know it as bells go off and the DIC lites up. This happened to me a couple of years ago just before the transmission went out.
Burning Brakes
Joined: Feb 2009
Posts: 811
Likes: 0
From: greenville north carolina
Mine is the automatic. Where would you guys recommend i go to have the transmission fluid completely switched over to royal purple? So, 12 qts of Royal Purple I need to bring, and what else...(sorry, totally a newbie hear) which is why i have my vehicle's maintenance done somewhere else.
Advanced
Joined: Dec 2007
Posts: 87
Likes: 1
Ahhhh, high a4 tranny temps, the bane of my life! Many mods done to car and eng. so, more heat. Have a B&M maxicool with fan installed and it's working fine untill outside air temps go beyond 80s and if I'm running around town with lots of stop and go or stuck in traffic...then the temps will start rising and go beyond 200..but nowhere near as bad as before installing cooler. Anyway, I've elected to install another B&M maxi cooler w/o fan(maybe a mistake) at the rear of the car and hopefully this will do the trick. I will post once it's been installed and I can see how it's working out.
Le Mans Master
Joined: May 2006
Posts: 7,835
Likes: 224
From: Hillsboro OR
The Machine we use is a FLUID EXCHANGER!!!!! I havent seen or ever used a POWER FLUSH TYPE!!! I believe in this type machine as it removes old fluid and adds new fluid back to the pan thru the cooler line to the front... Hook into line, crank car and check for line pressure, It wont work if hooked up backwards.... Hit drain pan, then it beeps very loud as pressure starts to fall just a # or 2!!! Remove pan, change filter.. install pan.. Then hit refill and it automatically adds the same amount of fluid removed (via load cells in the tanks)....
Then hit the 4-8-12-16-20 quart button and it will pull the old coming out and replace to the pan with new...... Using the car running with the trans pump for the infusion...Totally safe and you can exchange until it is clear in the sight glasses... Very cool and we havent lost a tranny yet... If new flluid will hurt it then should we never change the fluid, that wouldnt make sense would it. I can agree with the varnish, but we scrutinize the condition of thwe trans and of course the mileage.....Just my .02 Plus im in on the tranny temps......
Then hit the 4-8-12-16-20 quart button and it will pull the old coming out and replace to the pan with new...... Using the car running with the trans pump for the infusion...Totally safe and you can exchange until it is clear in the sight glasses... Very cool and we havent lost a tranny yet... If new flluid will hurt it then should we never change the fluid, that wouldnt make sense would it. I can agree with the varnish, but we scrutinize the condition of thwe trans and of course the mileage.....Just my .02 Plus im in on the tranny temps......
As an engineer I am compelled to ask how you scrutinize the transmission condition and its mileage. What is the criteria that determines when the varnish is so bad that you won't flush one?
Race Director
Joined: Jul 2007
Posts: 11,467
Likes: 8
From: 972 and 405
Mine is the automatic. Where would you guys recommend i go to have the transmission fluid completely switched over to royal purple? So, 12 qts of Royal Purple I need to bring, and what else...(sorry, totally a newbie hear) which is why i have my vehicle's maintenance done somewhere else.
-Alex
Burning Brakes
Joined: Jul 2006
Posts: 764
Likes: 0
From: felton de
Trans Temps
I have 3.73 and a 3600 stall. Trans temp were a problem even with large capacity tranny pan and large external cooler. I stopped running the cooling lines thru the radiator and they go only to the trans cooler. My trans temps are never over 185 degrees even with the supercharger and driving it hard. They say that is bad to do this for winter driving but I think that is BS. Even in the winter my trans temps go right up with the start of the car to around 120 degrees. Heat kills these transmission and I think that bypassing the radiator is the way to go IMHO
Brian
Brian
Last edited by brian vette; Jun 11, 2009 at 03:05 PM.
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Racer
Joined: Dec 2004
Posts: 262
Likes: 0
From: Clearwater FL
I have 3.73 and a 3600 stall. Trans temp were a problem even with large capacity tranny pan and large external cooler. I stopped running the cooling lines thru the radiator and they go only to the trans cooler. My trans temps are never over 185 degrees even with the supercharger and driving it hard. They say that is bad to do this for winter driving but I think that is BS. Even in the winter my trans temps go right up with the start of the car to around 120 degrees. Heat kills these transmission and I think that bypassing the radiator is the way to go IMHO
Brian
Brian
If you drive in nice weather only (no freezing, etc.) then feel free to run it through only an external cooler. This is how I have it set up on the fiance's LS1 T/A with a 3500 converter. She doesn't drive unless there's not a cloud in the sky though.. so its always nice when that car is out
Ideal trans temp = 160-185ish
Pro
Joined: Jun 2008
Posts: 575
Likes: 10
From: Oskaloosa Iowa
Here is possibly a dumb question how are you guys knowing what your trans temps are? I have a 02 non-Z06 6 speed and i'm currently converting it over to an automatic do i have to get an aftermarket trans temp gauge? I don't believe my DIC displays trans temps, just oil temp etc.
Race Director
Joined: Jul 2007
Posts: 11,467
Likes: 8
From: 972 and 405
Here is possibly a dumb question how are you guys knowing what your trans temps are? I have a 02 non-Z06 6 speed and i'm currently converting it over to an automatic do i have to get an aftermarket trans temp gauge? I don't believe my DIC displays trans temps, just oil temp etc.
-Alex
Pro
Joined: Jun 2008
Posts: 575
Likes: 10
From: Oskaloosa Iowa
since the same computer is used for the auto and manual, and currently i'm having my computer reflashed so all the auto stuff inside will be turned on is the temp gauge an option that gets turned on as well?
If so, where is the temp sensor in an A4 or is it located somewhere else?
Thanks!
If so, where is the temp sensor in an A4 or is it located somewhere else?
Thanks!
Melting Slicks
Joined: Jun 2009
Posts: 2,906
Likes: 10
From: Jesuit Bend Louisiana
You are really at the mercy of the water temp in your radiator. The other morning I ran the car 75-80 MPH for about 10 miles and then hit dead stand still traffic for about 15 min. I didn't have the AC on and noticed my cooling temperature had shot up to 225. I immediatelly turned the heat up all the way and fan on high. Yes, it got HOT in the car but I was worried about the engine. I ran through my ohter temps, i.e. oil, and tranny and they were up over 200 as well.
When traffic let up, I drove and the temps came down to 195 and the oil and transmission came down as well.
When I got back to the office I got on the forum and found out this is completely NORMAL!
Heck, the electric fans don't kick on till you hit 225 degrees and the 2nd fan kicks on at 235 degrees! This is by design.
I did find out if I would have turned on the AC, both fans would have kicked on regardless of the engine temperature.
So, bottom line is that if you are not going over say 250 degrees don't sweat it!
When traffic let up, I drove and the temps came down to 195 and the oil and transmission came down as well.
When I got back to the office I got on the forum and found out this is completely NORMAL!
Heck, the electric fans don't kick on till you hit 225 degrees and the 2nd fan kicks on at 235 degrees! This is by design.
I did find out if I would have turned on the AC, both fans would have kicked on regardless of the engine temperature.
So, bottom line is that if you are not going over say 250 degrees don't sweat it!
Race Director
Joined: Jul 2007
Posts: 11,467
Likes: 8
From: 972 and 405
You are really at the mercy of the water temp in your radiator. The other morning I ran the car 75-80 MPH for about 10 miles and then hit dead stand still traffic for about 15 min. I didn't have the AC on and noticed my cooling temperature had shot up to 225. I immediatelly turned the heat up all the way and fan on high. Yes, it got HOT in the car but I was worried about the engine. I ran through my ohter temps, i.e. oil, and tranny and they were up over 200 as well.
For example, if your car is baking at 220F and you turn on your AC to 60F on the lowest speed, both fans being on isn't going to bring down your motor temps. But if you turn your AC on to full blast at 90F, then you will see the water temp fall very quickly.
-Alex
