"Damaged Driveshaft?'

JARblue

Sounds fishy to me. Like others have pointed out, the driveshaft doesn't get that hot and is a very unlikely candidate to melt the dust boot for the shift assembly. Ask to look at it for yourself and take a photo.

Regardless of what happened, if you or another shop installed the short shifter and did not secure the dust boot properly, then it and whatever it damaged will not be covered by the Nissan warranty.

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SouthArk370Z

I'm not familiar with the dust boot on the Z but, if it's anything like others I've seen, I can imagine the boot coming loose and falling against the driveshaft. Friction would cause the boot to heat up and melt. I'm also imagining that when the vehicle was parked, the boot would glue itself to the driveshaft.
My guess is that a wire brush and some elbow grease will solve the problem.

+1. Even if the boot glued itself to the driveshaft and got ripped off, I doubt if it would do any damage to the driveshaft. Get a second opinion from another shop.

Yep.

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JARblue

The boot sits directly above the drive shaft with room on either side and nothing really to catch on. It seems to me that the most likely scenario if the boot were to fall onto the spinning drive shaft is that it would just slip off to one side and fall on the ground. Even if the boot fell after the car had stopped, I do not believe the drive shaft would be hot enough to melt the boot to it. But if it did, there's no doubt you would hear the boot smacking the aluminum shielding around the driveshaft until it was slung off by the centrifugal force.

Plus the fact that it was a dealer$hit diagnosis it leads me to believe they are blowing smoke. OP should look at it for themselves or get a second opinion from a reputable shop as already suggested.

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SouthArk370Z

Not trying to argue with you; just offering a different theory.

In any case, it doesn't sound like anyone thinks the boot would damage the driveshaft.

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Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

JARblue

Of course

I was just trying to give some perspective as someone that has removed the dust boot and the drive shaft multiple times

I guess technically, the boot sits above the transmission linkage. But the linkage extends back from the transmission and the drive shaft is immediately below it. There is room on either side of the driveshaft to reach up and access the linkage, which is where the boot would most likely fall it seems.

Looking at the pic below, the exhaust y-pipe is immediately under the driveshaft just back from the linkage, so I guess in theory the boot could have somehow found its way in between the exhaust pipe and the driveshaft, which ultimately could have both melted the boot and adhered it to the driveshaft. Of course, OP has Invidia CBE, so I'm not sure if that same scenario would be possible on his car.

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Heff

I'll be taking it to another dealership on Tuesday and see if they give me the same answer and if so ill definitely get some pictures and post back to you guys before making any final decisions. thank you