You will need the dealer to re flash your ECU to a big tow. My dealer gets about $100 to do it.

 

Here is my question about this though. Last time I was at the Nissan dealership asking about reflashing my truck to 4x4 in 08 (tech told me he had reflashed a 2wd to 4wd to get rid of the WOT restriction) he said he could but when he went into his database there was no update provision for the 06-08 titans at the time. So I am wondering if they have it now?

 

there are still no updates. If you can find the right ECU # & get uprev then you can reflash the ECU to that #.

 

How exactly am I supposed to find correct ecu#?

 

Well just got off the phone with the technician at nissan and he says he would like to know how to reflash the truck to big tow. The laptop he says only pulls up a reflash for years 04-05 not 06-up, so if it can be done can someone that has had it done please tell me so that I can do this. I also had him look me up a ecu for a 07 xe with big tow package and its gonna be 600 bucks but he will do it for 480. Damn that is still alot of money.

 

Find another truck identical to your but with big tow. get them to either give you the vin & you can call nissan parts to get the ECU# or if they can find out for you. At leaste that is what I did.

 

How much did it cost you? And did you have to send them you're ecu or what? I emailed uprev this morning but still have not heard back.

 

I had a friend with up rev flash it for me. I just paid for the lisence aggreement so he could do it. I dont remember how much it was now.

 

UPREV can do it but its gonna cost 300.00 to do it.:crying: Still nobody has come forward that has actually had the dealership do it to their truck and IF they have was it newer than 06. Starting to sound like the reflash at the dealership is a urban legend, everybody talks about it being done but has anyone actually done it themselves.

 

Drop Rb'sTitan a PM, he did it.

 

Anyhow going from 2.94 to 3.36 with 35's may workout just fine. If it does great if it does not then time to....

1. reflash ECU via UpRev
2. buy second ECU that matches the truck specs for 07 BT, then have Nissan map the NATS and test to see if that works.

"1" I know works. Save some cash send ECU ti UpRev or find a local UpRev tuner and have them reflash for perhaps a license fee and thier time.

 

Thanks for the response RB I think the biggest misconception is that everyone is just saying have the dealer reflash and unfortunately it is not that simple or cheap. Like I said the ecu is over 600 dollars and my guy will hook me up for 480 but that is still too much of a chunk of change to just see if it will work. I think this should be a sticky due to someone like me reading all the threads thinking I could just go to the dealership and have them reflash a big tow tune. Then getting ready to drop the hammer only to find out it's never just that simple and having to shell out another 300 bucks.:huh:

Guess I am gonna have to do it and cross my fingers and hope the larger diameter of the tires will compensate with the lower gear ratio and "even out" the two working together.