Posted on a couple of different boards and still no answer.

I googled my problem and saw ARMY350 on this board had this issue in the past. I have messaged him. If anyone else knows how to get in touch with him please let me know or send him this link.

My problem is that on my 2011 F250, with MiniMax, Full Delete, intake and exhaust, the trans temp gets as high as 230 degrees. I have 85K miles on it and have had the tuner for about 50K. While driving down the freeway with no load my tuner defuels due to 220 degree trans temp. I took it into the dealership and they replace the TFT(transmission fluid temp sensor) and then 3 days later it is 230 degrees. One was sitting in bumper to bumper traffic and the other just driving. I don't race, I just like the tuner to enhance mpg. So I take back to dealership and they have it for over a week, and they cant find any problems with it. They tell me they have checked everything and have been trouble shooting through the engineers at ford. Engineers say nothing is wrong and to release the truck to the owner, me.

I then have transmission flushed and am still having the issue. I have talked to the company that installed the tuner and they have not seen this and I have also talked to other performance shops that I have used in the past. I feel that something is wrong, but don't know where to even start.

Any recommendations, advice or suggestions would be appreciated. Thanks in advance.

 

I'm sure you already looked into this but the only thing that comes to mind is your trans cooler is no good. is anything else running hot?

 

Dealer said they checked this, but am thinking I am going to put a new aftermarket cooler on there and see what Maybe even a larger pan. What are your thoughts?

 

i would say a trans pan might help i have a maghytec trans pan myself 5.5 quarts more than stock however i do not see a big change in temp it just takes a little longer to get hot. i have considered getting a BD diesel aux trans cooler since it has a fan and 180 degree thermostat but I'm not sure where to mount it

just a thought but do you have access to a temp gun you could check the before and after lines on the trans cooler i could compare it to mine and see where that leads

 

not right now, but was thinking of picking one up. Was going to price them but haven't gotten that far due to work

 

Interesting? The transmission fluid is cooled by the secondary cooling system along with the CAC, Fuel cooler and EGR Cooler. I don’t have the information with me right now but usually the dealer won’t even look at it if they didn’t get a code. By memory the TFT (sensor) will set one or all of three codes.

I believe that the PCM will throw a code if the TFT is out of range (70F-225F) for 2.5 minutes.

Like the other poster mention, I’d try a temp gun. I’m not a bigf an of changing parts till I know it is the cause. I’ll try and post the Ford documentation tomorrow.

 

I have a brother in law that tried everything to get his temps down. Not the same tranny as you though.

He lives in Arizona.

bigger cooler and nothing worked.

He finally put another aux cooler and a fan on it near the tranny to get his temps down.

 

Thanks, I really appreciate your input.

 

C&R Racing makes an auxiliary transmission oil cooler for the 6.7L diesels. It's all aluminum, good quality construction, and is powerful enough to take over the OEM one completely if necessary. It'll help keep your temps down for sure.

Call 704 799 0955 and ask for Jeff. He can help you out.

 

Cool looking truck you got there!Can you post some pictures of it in a new thread?

 

Thanks! We've got some pictures/videos of it on our company website if you want to take a look: interarmored.com

Also check out our FB page!

 

I saw something very similar to this recently on "Shipping Wars". Was it by any chance the same company?

My apologies to the OP for the hijack.