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2017 Titan Transmission TSB Info

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#462 ·
It has been a week ago since I had the latest reflash of the transmission of my 2017 Titan.....What a world of difference.....As others have reported this seems to have resolved all of the shifting issues....Also as others have reported I have seen an increase in fuel mileage....This update has made a HUGH difference in how well this transmission shifts and the overall operation of this truck
 
#463 ·
I go to have mine flashed on Jan 2nd along with the seat belt recall, the passenger side rear defroster quit and the roof needing to be repainted because the paint is flaking off. I sure hope that this fixes the issue, but after talking with a service adviser I have my doubts because he said he had his flashed and the issues returned. When I had mine flashed the last time the truck drove like a whole different truck, but the issues returned after a few thousand miles and I'm expecting the same thing with this new flash.
 
#464 ·
Ripler said:
I go to have mine flashed on Jan 2nd along with the seat belt recall, the passenger side rear defroster quit and the roof needing to be repainted because the paint is flaking off. I sure hope that this fixes the issue, but after talking with a service adviser I have my doubts because he said he had his flashed and the issues returned. When I had mine flashed the last time the truck drove like a whole different truck, but the issues returned after a few thousand miles and I'm expecting the same thing with this new flash.
Click to expand...

I talked to a guy who had the update and 5000 miles later its still doing good he said so hang in there if they install it right the results should be a winner!
 
#467 ·
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robbace said:
Had mine flashed first part of Dec. Put 2000+ miles on it since. Runs great.

Also just got word a recall (kinda) is in the works...

See screen shot.
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Just had a look at your work order for that update. Must be different in the USA then Canada unless you have this update in already? NTB17-016e

The NTB17-016e is the latest tcm ecm update, I would get your dealer to confirm if your truck has it. If not push them to get it, its suppose to be a big improvement. I am getting that done tomorrow.
 
#468 ·
I had my truck back in the shop today for the RPM fludder. I supposedly had the "E" update done about a week ago or so. They hooked it up to two different computers today. Both said it needed an update but neither would allow the tech to continue with the update. They have started a case with Nissan. My wife's 2017 Armada had an update at 5000 miles during the first oil change. I think probably the "C" update. It was fine for almost 3000 miles and now the shifting issues and RPM fludder are back on it. So I have two POS Nissan transmissions to deal with. I am very frustrated right now to say the least.
 
#469 ·
Re: UPDATE!! 2017 Titan Transmission TSB Info

I’m planning on getting my ‘17 P4X flashed in the next couple of weeks and wanted to confirm the “learning” aspects...do I need to drive the truck hard for a period of time after the flash to prevent the transmission from having problems again or just drive normal? I think I have read that lots of highway driving soon after the flash may not be a good idea (?). I assume I will get the “E” flash (I have only had the “A” flash done previously and it lasted 500-1000 miles. Thanks in advance!


Sent from my iPad using Tapatalk
 
#470 · (Edited)
jmarwill said:
I’m planning on getting my ‘17 P4X flashed in the next couple of weeks and wanted to confirm the “learning” aspects...do I need to drive the truck hard for a period of time after the flash to prevent the transmission from having problems again or just drive normal? I think I have read that lots of highway driving soon after the flash may not be a good idea (?). I assume I will get the “E” flash (I have only had the “A” flash done previously and it lasted 500-1000 miles. Thanks in advance!


Sent from my iPad using Tapatalk
Click to expand...
So, I'm not sure where information about the transmission learning originally came from. But, I've been told by Nissan that there is no learning on our transmission. So, I looked in the transmission section of the tech manual. If you search learn, the only thing you will find is an error code about incomplete learning on the Titan XD diesel transmission.
 
#471 ·
adamjt said:
So, I'm not sure where information about the transmission learning originally came from. But, I've been told by Nissan that there is no learning on our transmission. So, I looked in the transmission section of the tech manual. If you search learn, the only thing you will find is an error code about incomplete learning on the Titan XD diesel transmission.[/QUOT

I've been told by Nissan that there is no learning on our transmission :eek_surprise:not sure of that..all automatic transmission come from the factory whit 3 mapping and it decide by driver habit what one to use to do it best shift point..wen i use my BMW whit my key the car shift in 1 gear at the stop
.went i use my wife key it will stay in 2 gear..so the car now ho driving..
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#472 ·
The 7 speed auto transmission in the CTS utilizes a line pressure control system during upshifts to compensate for the normal wear of transmission components and to maintain shift quality. (Without this control system shifts would be more abrupt and harsh). By adjusting the line pressure, the TCM (transmission control module) can maintain acceptable transmission shift times. This process is known as "adaptive learning" or "shift adapts".
In order for the TCM to perform a "shift adapt", it must first identify if an upshift is acceptable to analyze. For example, upshifts that occur during cycling of the A/C compressor or under extreme throttle changes could cause the TCM to incorrectly adjust line pressure. When an upshift is initiated, a number of contingencies, such as throttle position, transmission temperature, and vehicle speed, are checked in order to determine if the actual shift time is valid to compare to a calibrated desired shift time. If all the contingencies are met during the entire shift, then the shift is considered valid and the adapt function may be utilized if necessary.
Once an adaptable shift is identified, the TCM compares the actual shift time to the desired shift time and calculates the difference between them. This difference is known as the shift error. The actual shift time is determined from the time that the TCM commands the shift to the start of the engine RPM drop initiated by the shift. If the actual shift time is longer than the calibrated desired shift time, a soft feel or slow engagement, then the TCM decreases current to the pressure control (PC) solenoid in order to increase line pressure for the next, same, upshift under identical conditions. If the actual shift time is shorter than the calibrated desired shift time, a firm engagement, then the TCM increases current to the PC solenoid in order to decrease line pressure for the next, same, upshift under identical conditions.
The purpose of the adapt function is to automatically compensate the shift quality for the various vehicle shift control systems. It is a continuous process that will help to maintain optimal shift quality throughout the life of the vehic
 
#473 · (Edited)
my white titan said:
The 7 speed auto transmission in the CTS utilizes a line pressure control system during upshifts to compensate for the normal wear of transmission components and to maintain shift quality. (Without this control system shifts would be more abrupt and harsh). By adjusting the line pressure, the TCM (transmission control module) can maintain acceptable transmission shift times. This process is known as "adaptive learning" or "shift adapts".
In order for the TCM to perform a "shift adapt", it must first identify if an upshift is acceptable to analyze. For example, upshifts that occur during cycling of the A/C compressor or under extreme throttle changes could cause the TCM to incorrectly adjust line pressure. When an upshift is initiated, a number of contingencies, such as throttle position, transmission temperature, and vehicle speed, are checked in order to determine if the actual shift time is valid to compare to a calibrated desired shift time. If all the contingencies are met during the entire shift, then the shift is considered valid and the adapt function may be utilized if necessary.
Once an adaptable shift is identified, the TCM compares the actual shift time to the desired shift time and calculates the difference between them. This difference is known as the shift error. The actual shift time is determined from the time that the TCM commands the shift to the start of the engine RPM drop initiated by the shift. If the actual shift time is longer than the calibrated desired shift time, a soft feel or slow engagement, then the TCM decreases current to the pressure control (PC) solenoid in order to increase line pressure for the next, same, upshift under identical conditions. If the actual shift time is shorter than the calibrated desired shift time, a firm engagement, then the TCM increases current to the PC solenoid in order to decrease line pressure for the next, same, upshift under identical conditions.
The purpose of the adapt function is to automatically compensate the shift quality for the various vehicle shift control systems. It is a continuous process that will help to maintain optimal shift quality throughout the life of the vehic
Click to expand...
That is a constant adapt though. Not a learn mode after a transmission flash. Big difference.

EDIT:
I swear that adapt process is hosed up up on my truck. After driving a while, most all shifts have a bit of shock and the tach bounces up and down after the shift. I can hear it in the exhaust note with the radio off too. Stinks. Curious if others are the same way.
 
#474 ·
adamjt said:
That is a constant adapt though. Not a learn mode after a transmission flash. Big difference.

EDIT:
I swear that adapt process is hosed up up on my truck. After driving a while, most all shifts have a bit of shock and the tach bounces up and down after the shift. I can hear it in the exhaust note with the radio off too. Stinks. Curious if others are the same way.
Click to expand...
Mine use to be that way but since the proper updates on both the ecm and tcm all so far is spot on! No shifting issues nor rpm fluctuation. Are you dealing with your service manager? If not I would go that route and express the issues your having. They are not "normal".
 
#475 ·
terry32506 said:
adamjt said:
That is a constant adapt though. Not a learn mode after a transmission flash. Big difference.

EDIT:
I swear that adapt process is hosed up up on my truck. After driving a while, most all shifts have a bit of shock and the tach bounces up and down after the shift. I can hear it in the exhaust note with the radio off too. Stinks. Curious if others are the same way.
Click to expand...
Mine use to be that way but since the proper updates on both the ecm and tcm all so far is spot on! No shifting issues nor rpm fluctuation. Are you dealing with your service manager? If not I would go that route and express the issues your having. They are not "normal".
Click to expand...
Interesting. Glad to know that should go away. I do have the latest updates for my truck. But, I also have a case open with Nissan working on it. Since the updates don't seem to have worked on my truck.
 
#476 ·
adamjt said:
Interesting. Glad to know that should go away. I do have the latest updates for my truck. But, I also have a case open with Nissan working on it. Since the updates don't seem to have worked on my truck.[/QUOTE

Great that you have opened up a case. Apparently about 20% of the updates have failed. One particular reason my dealer told me was because of software download failure. I can see that happening. The other issue that causes the updates to fail is if the engine and tranny are not at the proper temperature prior to doing the update then the update will fail. It is possible this is what has happened with your truck. If I was you see if you can have them verify if in fact the updates were done on your truck at the proper temps or not. I have seen some strings in here with others saying they didnt warm their trucks up prior to the updates. Worth a try to look into to be sure.
Click to expand...
 
#478 ·
adamjt said:
What is the best way of posting a video on here? I feel like I should post a video of the flutter on my truck at steady speed on the highway and accelerating. To see how many people still have that
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I dont think you can post a video on here because they cap your data as it is for photo uploads. I would upload it to YouTube. You will probably get more responses , worth a try at least.
 
#479 ·
Post the video to YouTube. Then paste the address here. To embed the video here remove the "s" from HTTPS.
 
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#480 ·
Back in the old days, the two degree timing advance wouldn't stick if the truck had not been warmed up correctly.
 
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