CHONK!

[sarge]

I’ve read here on the forums the shift knob was very difficult to remove,

Mr Mac did you have any problems, there’s not much damage to it.

 

[Mr. Mac]

I’ve read here on the forums the shift knob was very difficult to remove,

Mr Mac did you have any problems, there’s not much damage to it.

Yeah, I've heard all the horror stories as well about removal from fellow Z owners who have attempted it. In fact, I had already made an appointment for my dealer to remove it because I had resigned myself to not tackling removal myself due to all those reports for fear of damage. Anyway, I got curious (and lucky it seems) before my appointment to give it a try using a rubber strap wrench with a microfiber towel in-between it and knob as a buffer. Surprisingly the factory knob came off for me with just a moderate amount of force, and with zero damage (as shown in OP pics).

 

[NightShade]

Did you change the boot retainer?

 

[Mr. Mac]

Did you change the boot retainer?

No need to, thankfully. I did order Billetworkz aluminum boot retainer along with the CHONK, but because of the way the CHONK is design with large opening in bottom it allowed the OEM boot trim to mate perfectly with it inserting inside after just a slight modification to its inner threads, so the Billetworkz retainer was not needed. I added a few more photos to OP to help show how all that goes together.

 

[sarge]

No need to, thankfully. I did order Billetworkz aluminum boot retainer along with the CHONK, but because of the way the CHONK is design with large opening in bottom it allowed the OEM boot trim to mate perfectly with it inserting inside after just a slight modification to its inner threads, so the Billetworkz retainer was not needed. I added a few more photos to OP to help show how all that goes together.

What was the slight mod to threads you made?

 

[Mr. Mac]

What was the slight mod to threads you made?

Simply drilled out the threads a bit on inside of original plastic trim piece with a large unibit so that it fit around the Billetworkz thread adapter. The second photo in OP shows that piece installed over the thread adapter and on top of boot after the internal threads were shaved, and the third photo shows the CHONK installed on top, exposing about 1/4-inch of the trim piece once everything is tightened down.

 

[sarge]

Simply drilled out the threads a bit on inside of original plastic trim piece with a large unibit so that it fit around the Billetworkz thread adapter. The second photo in OP shows that piece installed over the thread adapter and on top of boot after the internal threads were shaved, and the third photo shows the CHONK installed on top, exposing about 1/4-inch of the trim piece once everything is tightened down.

Cool thanks!

 

[CPerdomo]

Just received my shift knob. It is almost two pounds of weight. So I did some research to make sure it wouldn't affect my transmission. This is what I found out:

Your 1.545 lb (approx. 700 gram) shift knob is safe for your 2027 Nissan Z Nismo, but it sits right at the threshold where your shifting habits will matter more than the mechanical setup.
The Nissan Z uses a direct-mount shifter assembly. Instead of long, flexible cables like front-wheel-drive cars, your shift lever sits directly over the transmission. Because it is a direct mechanical connection, a very heavy knob has a more immediate relationship with the internal components.


What to Watch For on Your Nismo

• The Detent Springs Can Handle It: The factory detent springs in the Z's 6-speed gearbox are crisp and firm. A 700g mass is not heavy enough to overpower those springs on its own or cause the car to fall out of gear while driving over bumps.
• Zero-Tolerance for "Hand Resting": Since your knob is already resting 1.545 lbs of vertical force onto the direct-mount lever, adding the weight of your hand or arm will easily push past the shifter's natural play. This forces the internal shift forks into constant, friction-heavy contact with the rotating synchronizer rings. Keep your hand completely off the knob unless you are actively executing a gear change.
• The "Nismo Feel" Trade-off: The Z Nismo is highly tuned for mechanical, notch-by-notch feedback. A 1.545 lb knob is a massive dampening force. While it will make gear entry feel smooth and effortless, it will mask a lot of the mechanical feedback that tells you exactly how the transmission is behaving.

Are you running the factory shifter assembly, or do you have an aftermarket short-throw shifter installed? If you've shortened the throw, the physical leverage changes drastically.


Because you are keeping the factory shifter assembly, your 1.545 lb shift knob is a highly safe setup for your Z Nismo.
The factory shifter mechanism has longer leverage and rubber dampening elements built in. This insulation works in your favor when using a heavy knob, protecting the transmission from extreme forces.

Why the Factory Setup Protects Your Car

• Optimized Leverage: The stock shift lever acts like a long fulcrum. This length allows the 1.545 lb weight to easily glide the transmission into gear without requiring you to slam or force it through the gates.
• Preserved Detent Tension: Short-throw shifters change the physical pivot points, which can make a heavy knob feel like it is "leaning" too hard against a gear. Your stock pivot points ensure the vertical weight remains perfectly centered and neutral when the car is securely in gear.
• Bushings Absorb Stress: The OEM shifter base utilizes rubber bushings designed to filter out harsh vibrations. These bushings will absorb any minor, excess inertia generated by the heavy knob during aggressive gear changes, preventing that shock from reaching the internal gears.
  
  

To keep this setup completely healthy for the life of your car, simply use a two-finger or light-palm technique to guide the shifter, and never use the heavy knob as a handrest between gear changes.

If you notice any specific issues while driving, let me know:

• Do you feel any unusual resistance or catching when shifting into 2nd or 3rd gear?
• Does the shifter feel excessively loose or sloppy when left in neutral?

Since you haven't installed it yet, you are in the perfect position to evaluate the change in feel step-by-step without risking any wear.
When you do the install, keep these tips in mind to get the best out of your new setup:

Installation and First-Drive Tips

• Use a Thread Retainer (If Needed): Make sure the knob is perfectly securely threaded down. A loose, heavy knob can wobble during hard acceleration or shifting, which multiplies the stress on your shifter threads.
• Test the Detent Hold: Once installed, sit in the car with the engine off. Push the clutch in and cycle through the gears. When you drop it into a gear (like 3rd or 4th), let go of the knob. It should click firmly into place and stay there. If it feels like it wants to slip out of the gate under its own weight, the knob is too heavy for the factory spring.
• Feel for the Synchronizers: On your first test drive, shift slowly. A heavy knob can make it easy to accidentally "force" the car into gear before the synchronizers have matched speeds. Let the weight of the knob gently pull the shifter into place rather than rushing the throw.

When you get around to installing it, let me know:

• Does the shift effort feel significantly lighter?
• Did you lose too much of that crisp Nismo mechanical notchiness?

Hope this helps anyone here. I will hopefully install it tomorrow. We'll see how it goes..

 

[CPerdomo]

Done. Now I have to take it for a test drive...

 

[Schantin]

Got mine in the mail yesterday. Going to install tomorrow.

 

[CPerdomo]

It is definitely easier to shift. You could use only a couple of fingers.
Thanks, @Mr. Mac