Engine, Drivetrain & Forced-Induction
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Help 7A/T Forced Induction Issues/Problems

Old Jun 20, 2015 | 07:54 PM
  #61  
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So, I've been away for work and I came home Thursday night. My car has been sitting in my garage this whole time. The reason I hadn't sent my car to the Infiniti dealership yet is because I had wanted to put the stock drive shaft back on and remove the Uprev tune. As expensive as the transmission is, I wanted to do everything possible so that the warranty would be honored.

Anyway, I tow my car to JMS racing, bring the old drive shaft, and take a long moment to look at my car. I pretty much was preparing myself to be without the G for a few months (this was a horrible feeling). But hey, it's only a material object, in the grand scheme of life a car truly isn't important. We can't take it with us when we die...unfortunately.

So I leave JMS and a few hours later I get a call from Joaquin. First thing he tells me is to come pick up the vehicle. I asked him if I could wait until Sat because I would never be able to make it to the dealership before they closed. My impression was that they had installed the stock drive shaft and removed the tune. He then tells me "You're not going to be happy", my first thoughts are "what now, can this really be worse than I had thought?". He then says it again with more information added "You're not gonna be happy, but you will be happy". So I ask what's going on and the most awesome words came from his mouth, "There's nothing wrong with your transmission, you broke your CF drive shaft".

I can't believe how happy I was to hear that my drive shaft, which cost a pretty penny, had failed. Though, the alternative to this situation is why I was happy. My girlfriend dropped me off at JMS and I proceeded to drive home (of course I took the long way). Turns out that where the carbon fiber meets the aluminum, the "glue" had failed. So basically the aluminum was spinning inside the CF portion of the drive shaft at the forward part of the fitting, which would explain the high pitched squeal. I am so freaking happy, however I am hoping that PST will do the right thing and repair/replace the drive shaft. I am actually considering getting my money back if possible and getting an aluminum drive shaft instead (I would imagine there would be much less of a chance of failure. I really didn't think about how the CF mounts to the aluminum section of the drive shaft. How can glue be expected to keep it's bond for very long? I think there is only a couple of lbs. difference between CF and aluminum. Who knows, maybe I'll just keep the stock one. However, I do notice that the vehicle has a little less "pep" to it now .
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Old Jun 20, 2015 | 11:58 PM
  #62  
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Originally Posted by MidlifeCrisis
So, I've been away for work and I came home Thursday night. My car has been sitting in my garage this whole time. The reason I hadn't sent my car to the Infiniti dealership yet is because I had wanted to put the stock drive shaft back on and remove the Uprev tune. As expensive as the transmission is, I wanted to do everything possible so that the warranty would be honored.

Anyway, I tow my car to JMS racing, bring the old drive shaft, and take a long moment to look at my car. I pretty much was preparing myself to be without the G for a few months (this was a horrible feeling). But hey, it's only a material object, in the grand scheme of life a car truly isn't important. We can't take it with us when we die...unfortunately.

So I leave JMS and a few hours later I get a call from Joaquin. First thing he tells me is to come pick up the vehicle. I asked him if I could wait until Sat because I would never be able to make it to the dealership before they closed. My impression was that they had installed the stock drive shaft and removed the tune. He then tells me "You're not going to be happy", my first thoughts are "what now, can this really be worse than I had thought?". He then says it again with more information added "You're not gonna be happy, but you will be happy". So I ask what's going on and the most awesome words came from his mouth, "There's nothing wrong with your transmission, you broke your CF drive shaft".

I can't believe how happy I was to hear that my drive shaft, which cost a pretty penny, had failed. Though, the alternative to this situation is why I was happy. My girlfriend dropped me off at JMS and I proceeded to drive home (of course I took the long way). Turns out that where the carbon fiber meets the aluminum, the "glue" had failed. So basically the aluminum was spinning inside the CF portion of the drive shaft at the forward part of the fitting, which would explain the high pitched squeal. I am so freaking happy, however I am hoping that PST will do the right thing and repair/replace the drive shaft. I am actually considering getting my money back if possible and getting an aluminum drive shaft instead (I would imagine there would be much less of a chance of failure. I really didn't think about how the CF mounts to the aluminum section of the drive shaft. How can glue be expected to keep it's bond for very long? I think there is only a couple of lbs. difference between CF and aluminum. Who knows, maybe I'll just keep the stock one. However, I do notice that the vehicle has a little less "pep" to it now .

Man I'm glad to hear it wasn't the tranny on yours man......I definitely would have taken the driveshaft...glad you got yours sorted....I unfortunately didn't get the same news from my tune shop WORKS Motorsport. ...apparently I have some severe bindage going on...flashed my tune back to stock and took it in to the dealership...

They gave me a damn Ford Escape for a loaner 0_o....worst car...ever made. Lmao


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Old Jun 21, 2015 | 01:05 AM
  #63  
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They gave me a damn Ford Escape for a loaner 0_o....worst car...ever made. Lmao


Ouch, you should have demanded a Q50!
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Old Jun 22, 2015 | 09:46 AM
  #64  
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Originally Posted by MidlifeCrisis
So, I've been away for work and I came home Thursday night. My car has been sitting in my garage this whole time. The reason I hadn't sent my car to the Infiniti dealership yet is because I had wanted to put the stock drive shaft back on and remove the Uprev tune. As expensive as the transmission is, I wanted to do everything possible so that the warranty would be honored.

Anyway, I tow my car to JMS racing, bring the old drive shaft, and take a long moment to look at my car. I pretty much was preparing myself to be without the G for a few months (this was a horrible feeling). But hey, it's only a material object, in the grand scheme of life a car truly isn't important. We can't take it with us when we die...unfortunately.

So I leave JMS and a few hours later I get a call from Joaquin. First thing he tells me is to come pick up the vehicle. I asked him if I could wait until Sat because I would never be able to make it to the dealership before they closed. My impression was that they had installed the stock drive shaft and removed the tune. He then tells me "You're not going to be happy", my first thoughts are "what now, can this really be worse than I had thought?". He then says it again with more information added "You're not gonna be happy, but you will be happy". So I ask what's going on and the most awesome words came from his mouth, "There's nothing wrong with your transmission, you broke your CF drive shaft".

I can't believe how happy I was to hear that my drive shaft, which cost a pretty penny, had failed. Though, the alternative to this situation is why I was happy. My girlfriend dropped me off at JMS and I proceeded to drive home (of course I took the long way). Turns out that where the carbon fiber meets the aluminum, the "glue" had failed. So basically the aluminum was spinning inside the CF portion of the drive shaft at the forward part of the fitting, which would explain the high pitched squeal. I am so freaking happy, however I am hoping that PST will do the right thing and repair/replace the drive shaft. I am actually considering getting my money back if possible and getting an aluminum drive shaft instead (I would imagine there would be much less of a chance of failure. I really didn't think about how the CF mounts to the aluminum section of the drive shaft. How can glue be expected to keep it's bond for very long? I think there is only a couple of lbs. difference between CF and aluminum. Who knows, maybe I'll just keep the stock one. However, I do notice that the vehicle has a little less "pep" to it now .
I've heard a few stories of CF driveshaft failing at the joint like in your case, never heard of aluminum driveshaft failing though. I am curious what it sounds like though as I've had aluminum one on my privious ride g35 and it was humming at certain highway speeds. That's the only thing that's preventing me from getting one, car already sounds like a dump truck with an aftermarket clutch.

Last edited by serega13; Jun 22, 2015 at 01:05 PM.
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Old Jun 22, 2015 | 12:28 PM
  #65  
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Midlife - glad Joaquin and JMS got to the bottom of it and it is a lot of an easier fix than expected (also, glad you know the CF driveshaft doesn't last so I won't get one haha)

Ali6767 - sorry to hear that it's looking like the transmission is toast, if you have time reach out to level 10 and see what options they can help you with
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Old Jun 22, 2015 | 02:58 PM
  #66  
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[QUOTE=Lt8Che;3921353]Midlife - glad Joaquin and JMS got to the bottom of it and it is a lot of an easier fix than expected (also, glad you know the CF driveshaft doesn't last so I won't get one haha)

Yeah, with your boosted engine, I would imagine that the glue would break it's seal the first time you got into it .

Now that I've had a few days of being happy that the transmission wasn't the problem, I'm a little disappointed about the drive shaft issue . I really enjoyed the "pep" the car had with it on and the weight reduction. I can't see myself re-installing this part unless PST pays for the towing, drive shaft repair, shipping back and forth, and labor for the installation every time this happens. Even then, I don't want to deal with the hassle. I would imagine this problem happens quite a bit, I wonder if there are any design changes that could be done to prevent this problem. I'm gonna email them tonight and send a vid clip of the drive shaft failure...fingers crossed for a solution. At least the boost option is back on the table .
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Old Jun 22, 2015 | 03:18 PM
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[QUOTE=MidlifeCrisis;3921466]
Originally Posted by Lt8Che
Midlife - glad Joaquin and JMS got to the bottom of it and it is a lot of an easier fix than expected (also, glad you know the CF driveshaft doesn't last so I won't get one haha)

Yeah, with your boosted engine, I would imagine that the glue would break it's seal the first time you got into it .

Now that I've had a few days of being happy that the transmission wasn't the problem, I'm a little disappointed about the drive shaft issue . I really enjoyed the "pep" the car had with it on and the weight reduction. I can't see myself re-installing this part unless PST pays for the towing, drive shaft repair, shipping back and forth, and labor for the installation every time this happens. Even then, I don't want to deal with the hassle. I would imagine this problem happens quite a bit, I wonder if there are any design changes that could be done to prevent this problem. I'm gonna email them tonight and send a vid clip of the drive shaft failure...fingers crossed for a solution. At least the boost option is back on the table .

I know they have their aluminum one piece and Driveshaft shop makes both as well.
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Old Jul 6, 2015 | 03:04 PM
  #68  
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Back on the 7A/T issues!

After tackling the road course, it felt great... Went to the 1/4 strip the other day and started getting a power cut. Been talking with Pat from Level 10 and he said that the power is being cut with the traction control. I have been scrubbing multiple forums and it looks like I'll need to unplug or wire in a switch to the traction control unit. We shall see, getting confirmation with Pat then going to do the mod. Fingers crossed!
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Old Jul 6, 2015 | 08:15 PM
  #69  
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Originally Posted by Lt8Che
Back on the 7A/T issues!

After tackling the road course, it felt great... Went to the 1/4 strip the other day and started getting a power cut. Been talking with Pat from Level 10 and he said that the power is being cut with the traction control. I have been scrubbing multiple forums and it looks like I'll need to unplug or wire in a switch to the traction control unit. We shall see, getting confirmation with Pat then going to do the mod. Fingers crossed!
I believe my tuner disable the traction control so it's in tuning.
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Old Jul 7, 2015 | 10:11 AM
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Originally Posted by Kojack
I believe my tuner disable the traction control so it's in tuning.

I know the tuners can disable the brake/throttle issue, but I think that the traction control is too stubborn to put off, the VDC can be turned off, but the TC seems to be the biggest hold up in our Gs and Zs, especially FI.
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Old Jul 7, 2015 | 02:15 PM
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Originally Posted by Lt8Che
I know the tuners can disable the brake/throttle issue, but I think that the traction control is too stubborn to put off, the VDC can be turned off, but the TC seems to be the biggest hold up in our Gs and Zs, especially FI.
How to completely disable the VDC - Nissan 370Z Forum
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Old Jul 7, 2015 | 04:05 PM
  #72  
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Originally Posted by warpeacelove

Thanks! I've been browsing the 370 forum as they have more experience with tracking the car. I may end up removing all of the driver assists to ensure nothing is interfering. Right now I'm looking at putting an in-line switch for the yaw-sensor / traction control and the brake light fuse. We'll see if this helps.
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Old Jul 7, 2015 | 04:47 PM
  #73  
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350Z VS 370Z - Import Tuner Magazine

This article gives a good explanation of the traction control issue, it covers the brake issues as well.
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Old Jul 8, 2015 | 04:57 PM
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You can always unplug the YAW control, Its under the center console. Saw it when I was doing my shift ****.
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Old Jul 8, 2015 | 05:34 PM
  #75  
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Originally Posted by ANMVQ
You can always unplug the YAW control, Its under the center console. Saw it when I was doing my shift ****.

That's the plan. The yaw is what operates the traction control as I have read. Should be a Bosch unit. I'll be trying to get that done this week, if I have any time.
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