High Transmission Temperature???
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 18
Likes: 0
High Transmission Temperature???
Hello everyone,
I've change my old automatic transmission for a new one. I've just brought it from the USA.
The transmission is working well but, unfortunately, the temperature of the transmission is not. Every time that I start to enjoy my Corvette, the temperature starts to rise. It's not necessary the constant acceleration, it happens if I just start to go a little bit faster and stronger than the usual.
It's horrible because I can't enjoy my V8 with 360 hp. Anywhere I go I need to go slowly or the transmission temperature is gonna go to 230 ºF rapidly.
Do you guys have any suggestions for me?
Thanks!
Best regards,
Alex
I've change my old automatic transmission for a new one. I've just brought it from the USA.
The transmission is working well but, unfortunately, the temperature of the transmission is not. Every time that I start to enjoy my Corvette, the temperature starts to rise. It's not necessary the constant acceleration, it happens if I just start to go a little bit faster and stronger than the usual.
It's horrible because I can't enjoy my V8 with 360 hp. Anywhere I go I need to go slowly or the transmission temperature is gonna go to 230 ºF rapidly.
Do you guys have any suggestions for me?
Thanks!
Best regards,
Alex
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
Did you have the problem with the old one and the new one or just the new one? If it is the new one, make sure there is enough fluid in it. There is a very specific procedure for filling these transmissions.
If it was both, you can try flushing as suggested above and also checking to see if there is anything blocking the radiator or clogging up the fins with debris.
If it was both, you can try flushing as suggested above and also checking to see if there is anything blocking the radiator or clogging up the fins with debris.
Pro
Joined: Oct 2001
Posts: 668
Likes: 26
From: Wadsworth Ohio
When I had my RPM transmission installed they said to install an extra transmission cooler and said one of the best was the B&M cooler with it's own fan on it. Now the transmission temp. is between 10 and 30 degrees cooler than the coolant temp. even on very hot summer days. That said it still seems you have other problems, but the B&M cooler works great for me.
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 18
Likes: 0
Thanks! All of you!
I'll talk with my mechanic and ask him to do what you guys suggested!
Just for you know, it was happening with the old transmission to! That was one of the reasons that I replaced it.
The strange think is that my corvette has only 20.000 miles... I don't think that's a lot!
Best regards,
Alex
I'll talk with my mechanic and ask him to do what you guys suggested!
Just for you know, it was happening with the old transmission to! That was one of the reasons that I replaced it.
The strange think is that my corvette has only 20.000 miles... I don't think that's a lot!
Best regards,
Alex
Safety Car
Joined: Aug 2011
Posts: 4,449
Likes: 409
From: Portland OR
When I had my RPM transmission installed they said to install an extra transmission cooler and said one of the best was the B&M cooler with it's own fan on it. Now the transmission temp. is between 10 and 30 degrees cooler than the coolant temp. even on very hot summer days. That said it still seems you have other problems, but the B&M cooler works great for me.
The C5 takes a bit of inginuity to mount an aux cooler I might add.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
REMEMBER the trans fluid is cooled by a bulit in cooler in your radiator---If your engine temp is HOT-- it will transfer that heat to your trans fluid !! You can't cool a tranny under 200* if the radiator is 210* !! Always helps to install a lower engine thermostat
( I prefer the 160*) and Absolutely get a tune to reset the fans to come on earlier --mail order will work ! Not a handheld tuner though---will drop the ttrans temp 20*'s ( assuming there are no trans mechanical issues----
( I prefer the 160*) and Absolutely get a tune to reset the fans to come on earlier --mail order will work ! Not a handheld tuner though---will drop the ttrans temp 20*'s ( assuming there are no trans mechanical issues----
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Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
Also, the outside air temperature will have an effect on the transmission temperature.
How hot is the ambient air temperature, when your transmission fluid temperature reaches 230 degrees?
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 18
Likes: 0
Like the others have already mentioned, engine coolant temperature will directly affect the transmission fluid temperature.
Also, the outside air temperature will have an effect on the transmission temperature.
How hot is the ambient air temperature, when your transmission fluid temperature reaches 230 degrees?
Also, the outside air temperature will have an effect on the transmission temperature.
How hot is the ambient air temperature, when your transmission fluid temperature reaches 230 degrees?
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
I suspect that the fins in your A/C condenser and radiator are partially blocked with debris, which restricts the air flow for cooling.
Supporting Vendor
Joined: Jul 2010
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From: SacCityCorvette.com in Sacramento Ca Join us on Facebook!
St. Jude Donor '12,'13,'15,'16,'17
Make sure there are no kinks in the trans cooling lines that could restrict fluid flow. I do recommend a after market cooler, but the stock cooler should maintain a safe temp unless you tracking or drag racing your Vette. Make sure all the leaves and debris are thoroughly cleaned up under the front so there is no air restrictions through the condenser and radiator. One other thing is you can install a CoolIt that will allow you to turn your high speed fan on before the temps get to high. The cooler you keep the coolant, the cooler the trans fluid.
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Drifting
Joined: Sep 2009
Posts: 1,862
Likes: 594
From: Prescott, Arizona
At Buttonwillow Raceway Park, August 2011, outside air temperature 92 degrees. After a 20 minute track period, pulling into the paddock:
Transmission- 230 degrees
Engine Oil- 250 degrees
Engine coolant-220 degrees
I do have a B&M finned aluminum transmission pan on the A4. The pan has an extra two Qts capacity. I also run Redline D-4 ATF. No other dedicated transmission or engine oil cooler.
On a normal, no stop and go 20 mile drive to work, average speed ~ 45 mph, transmission temperature is 160 to 180 degrees on a cool 60 degree morning, pulling into my workplace parking spot.
Transmission- 230 degrees
Engine Oil- 250 degrees
Engine coolant-220 degrees
I do have a B&M finned aluminum transmission pan on the A4. The pan has an extra two Qts capacity. I also run Redline D-4 ATF. No other dedicated transmission or engine oil cooler.
On a normal, no stop and go 20 mile drive to work, average speed ~ 45 mph, transmission temperature is 160 to 180 degrees on a cool 60 degree morning, pulling into my workplace parking spot.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
ALEX
Where do you live?? Please check the AC Condenser (cooling coil in front of the radiator) and the actual RADIATOR for dirt SAND, grass, bugs, bags, etc etc......
Use an air hose to blow out any debris that is lodged in the cooling fins.
There is a 1" space between the AC cooling coil and the actual RADIATOR.. Remove the air bridge ducting between the MAF and throttle body and then remove the black plastic cover that covers the radiator and ac CONDENSOR. LOOK DOWN BETWEEN THE TWO AND SEE IF THERES ANY DIRT OR TRASH!!!
I bet you have a ton of accumulated stuff that needs to be blown out and flushed with a garden hose.
With a good clean radiator free to flow air, your cooling temps will stay a LOT lower and allow the trans to keep cool!!
Where do you live?? Please check the AC Condenser (cooling coil in front of the radiator) and the actual RADIATOR for dirt SAND, grass, bugs, bags, etc etc......
Use an air hose to blow out any debris that is lodged in the cooling fins.
There is a 1" space between the AC cooling coil and the actual RADIATOR.. Remove the air bridge ducting between the MAF and throttle body and then remove the black plastic cover that covers the radiator and ac CONDENSOR. LOOK DOWN BETWEEN THE TWO AND SEE IF THERES ANY DIRT OR TRASH!!!
I bet you have a ton of accumulated stuff that needs to be blown out and flushed with a garden hose.
With a good clean radiator free to flow air, your cooling temps will stay a LOT lower and allow the trans to keep cool!!
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 18
Likes: 0
ALEX
Where do you live?? Please check the AC Condenser (cooling coil in front of the radiator) and the actual RADIATOR for dirt SAND, grass, bugs, bags, etc etc......
Use an air hose to blow out any debris that is lodged in the cooling fins.
There is a 1" space between the AC cooling coil and the actual RADIATOR.. Remove the air bridge ducting between the MAF and throttle body and then remove the black plastic cover that covers the radiator and ac CONDENSOR. LOOK DOWN BETWEEN THE TWO AND SEE IF THERES ANY DIRT OR TRASH!!!
I bet you have a ton of accumulated stuff that needs to be blown out and flushed with a garden hose.
With a good clean radiator free to flow air, your cooling temps will stay a LOT lower and allow the trans to keep cool!!
Where do you live?? Please check the AC Condenser (cooling coil in front of the radiator) and the actual RADIATOR for dirt SAND, grass, bugs, bags, etc etc......
Use an air hose to blow out any debris that is lodged in the cooling fins.
There is a 1" space between the AC cooling coil and the actual RADIATOR.. Remove the air bridge ducting between the MAF and throttle body and then remove the black plastic cover that covers the radiator and ac CONDENSOR. LOOK DOWN BETWEEN THE TWO AND SEE IF THERES ANY DIRT OR TRASH!!!
I bet you have a ton of accumulated stuff that needs to be blown out and flushed with a garden hose.
With a good clean radiator free to flow air, your cooling temps will stay a LOT lower and allow the trans to keep cool!!
I live in São Paulo, Brazil. I've done what you said but everything was OK. Nothing is blocking the air flow... I've talked with my mechanic and he is suggesting that we by another radiator just for the transmission... What do you think? It seems to work on his Camaro!
Thanks for your help!
Best regards,
Alex
Thread Starter
Heel & Toe
Joined: Jul 2011
Posts: 18
Likes: 0
At Buttonwillow Raceway Park, August 2011, outside air temperature 92 degrees. After a 20 minute track period, pulling into the paddock:
Transmission- 230 degrees
Engine Oil- 250 degrees
Engine coolant-220 degrees
I do have a B&M finned aluminum transmission pan on the A4. The pan has an extra two Qts capacity. I also run Redline D-4 ATF. No other dedicated transmission or engine oil cooler.
On a normal, no stop and go 20 mile drive to work, average speed ~ 45 mph, transmission temperature is 160 to 180 degrees on a cool 60 degree morning, pulling into my workplace parking spot.
Transmission- 230 degrees
Engine Oil- 250 degrees
Engine coolant-220 degrees
I do have a B&M finned aluminum transmission pan on the A4. The pan has an extra two Qts capacity. I also run Redline D-4 ATF. No other dedicated transmission or engine oil cooler.
On a normal, no stop and go 20 mile drive to work, average speed ~ 45 mph, transmission temperature is 160 to 180 degrees on a cool 60 degree morning, pulling into my workplace parking spot.
My Corvette is doing, at the same day temperature, more like 190 to 210 degrees (without "hitting the gas"). I'm trying to discover what is wrong but, unfortunately, we don't have someone directly from GM (USA) to take a look.
It's hard work to own a Corvette in Brazil! hahaha... Only a few people know how to work on the car...
Thanks!
Best regards,
Alex
1st Gear
Joined: Oct 2016
Posts: 1
Likes: 0
solving the high temperature transmission oil problem
I had the same problem the causewas is that the transmission oil pipesvery close to the exhaust , just change the place where the oil pipe goes tothe other side and the problem is solved
anwar
anwar
Pro
Joined: Aug 2014
Posts: 508
Likes: 59
From: Oscoda Michigan
Drove the Vette 160 miles today. Outside air temp ranged from 56F to 70F. No freeway driving all two lane in and out of towns. Dic recorded my average speed as 48.6 mph, highest speed was 70mph average mileage 26.7 mpg. Oil pressure ran around 40 psi, oil temp 200F +/- 5F, coolant temp was a constant 192F, transmission temp 179F +/- 5F. Saw 2 other Corvettes, both waved back. Another great day in Michigan! Mike