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Ron, ASE Certified Technician
Category: Dodge
Satisfied Customers: 35599
Experience:  ASE Certs
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While driving to Atlanta from Houston, pulling an empty car

Customer Question

while driving to Atlanta from Houston, pulling an empty car trailer, My 2009 1500 4x2 truck popped a code P0740. after driving approx. 200 miles. Checked fluid a little low, added atf and cleared the code. went aproxemantly an other 200 miles and the trucked popped the same code. this happen all the way to Atlanta Ga. every 200 miles. But only when I was pulling the trailer. Never had the problem once the trailer was disconnected.
JA: Where exactly do you think the noise is coming from? And how long has this been going on?
Customer: no noise, just keeps popping the code P0740 every 200 miles when pulling a trailer
JA: What is the model of your '09 Dodge?
Customer: lone star 1500 (slt) 5.7 eng. transmission is a 545 RFE
JA: Are you fixing your 545 yourself? What have you tried so far?
Customer: i believe it's the torque converter clutch solenoid and possibly the torque converter it's self.
JA: Anything else you want the mechanic to know before I connect you?
Customer: truck has 96,510 mile on it.
Submitted: 8 months ago.
Category: Dodge
Expert:  Ron replied 8 months ago.

Hello. My name is ***** ***** I am happy to assist you today. Give me just a moment to review your post, and I'll be right back with the help you need.

Expert:  Ron replied 8 months ago.

Your correct in your assumption, this is usually caused bay either a failing converter clutch solenoid or in some cases the converter. Are you able to do some testing to determine the cause?

Customer: replied 8 months ago.
I can. what do you advise?
Customer: replied 8 months ago.
prefer written response
Expert:  Ron replied 8 months ago.

I have enclosed the factory pinpoint test steps as well as removal step and the wiring diagram for the transmission circuit in the links below. Run through the step and let me know if you have more questions and or need more help and we can work from there.