Gotta get these trans temps down

[JCockerill]

I have a 06 with the 48re auto, driving empty today in 85 deg weather, my trans temp hit 205 deg today, this is not normal for an unloaded "heavy duty" truck. I have a banks six gun on it. and am getting these temps from the pda. I allready installed the mag-hytec double deep pan & amsoil atf. what is my next step to cool this puppy down? a cooler, if so which one? thanks

 

[1965LONEWOLF]

Doesn't Sound Normal , With Everything I Have Done To The Truck , It Never Runs Over 180 With A Load In Bumper To Bumper Traffic, One I Get Rolling Its Between 140 - 160 With A Load On

 

[BZieg]

Pm HULLD he seems very knowledgeable. As well as everyone on here, really. I am sure more people will chime in.

 

[cerberusiam]

I have a 06 with the 48re auto, driving empty today in 85 deg weather, my trans temp hit 205 deg today, this is not normal for an unloaded "heavy duty" truck. I have a banks six gun on it. and am getting these temps from the pda. I allready installed the mag-hytec double deep pan & amsoil atf. what is my next step to cool this puppy down? a cooler, if so which one? thanks

Assuming the PDA is reading temp from the pan sensor, correct?



What type of driving were you doing? Was the TC ever locking up? 205 is not high or even unusual in heavy stop and go traffic.



I would be hesitant to trust the readings coming from any of the digital monitors. It seems they always run 20 degrees higher than a mechanical gauge. Before I would spend money chasing a non-existent problem I would verify the temp ranges with a mechanical gauage.

 

[JCockerill]

Assuming the PDA is reading temp from the pan sensor, correct?



What type of driving were you doing? Was the TC ever locking up? 205 is not high or even unusual in heavy stop and go traffic.



I would be hesitant to trust the readings coming from any of the digital monitors. It seems they always run 20 degrees higher than a mechanical gauge. Before I would spend money chasing a non-existent problem I would verify the temp ranges with a mechanical gauage.

the pda is reading whatever the stock factory sensor is telling it, where ever that is. . i don't know. i have to check the lock up. why would the digtal monitor be wrong if it's reading the stock sensor? thanks.

 

[raychem]

Put a temp probe on the Hot line. Do a serch you will find pictures of the install. Mass Diesel and Desiel manor sell the replacement line. There are other methods but this is the one I prefer. This will give you fluid temp as it is discharged fron the converter and is the hottest reading.





Richard

 

[cerberusiam]

the pda is reading whatever the stock factory sensor is telling it, where ever that is. . i don't know. i have to check the lock up. why would the digtal monitor be wrong if it's reading the stock sensor? thanks.

The stock sensor is in the pan on the VB. Its electronic and the signal is interpreted by the ECU and if deemed to be out of spec the dash lights come on.



I think the factory trip point is 260 degrees but have had people say they have seen 260-280 on an analog gauge in the pan with do MIL's.



The temp sensor is the same quality as the gov solenoid and transducer and they are problematic. I just don't trust what the sensor is saying, nor, what the electronic boxes are interpreting. Too many reported variations.



What type of driving were you doing when it read that temp? Crusing steady or stop and go?

 

[JCockerill]

The stock sensor is in the pan on the VB. Its electronic and the signal is interpreted by the ECU and if deemed to be out of spec the dash lights come on.



I think the factory trip point is 260 degrees but have had people say they have seen 260-280 on an analog gauge in the pan with do MIL's.



The temp sensor is the same quality as the gov solenoid and transducer and they are problematic. I just don't trust what the sensor is saying, nor, what the electronic boxes are interpreting. Too many reported variations.



What type of driving were you doing when it read that temp? Crusing steady or stop and go?

stop and go, thanks for the help.

 

[ScottLewis]

Just my 2 cents. Stop and go traffic causes a lot of heat build up because the TC doesn't lock up. 205* under those conditions probably isn't excessive. My temps stay under about 165 towing most of the time but high ambiant temps and pulling hills will bring it up. My target is 195 or so and when it gets there I start shifting down or backing off to get the TC locked up again.

Backing up, especially uphill, heats it up fast.



Dan

 

[cerberusiam]

stop and go, thanks for the help.

The temps are not that unusual then. Stop and go under 35-40 mph the TC never locks and you ar ein fluid coupling all the time. Was the 85 degree temp on the overhead or from another source? An 85 degree ambient air temp as reported by the Weather service can easily translate into 90-100 degrees on a city street. That will warm things up quite fast is traffic.



Your truck, your choice, but, I would not worry about those temps. My . 02

 

[TFucili]

The Allison in my '04 Chevy would get hotter than that idling at a traffic light.

 

[Diesel Manor]

A Mag-Hytec pan is usually good for a drop in temps. I think that you should first make sure you have a good idea of what the true temps are. We have a number of solutions for picking up the trans temp on your truck,as well as accurate gauges if you don't already have a set. Give us a call if you have any questions.

 

[JCockerill]

thanks for the help guys!