Nismo Differential upgrade

cv129 · 11-13-2020, 09:36 AM

Quote:

Originally Posted by Cyber370

Don't forget the OEM Nismo final drive ratio of 3.92. Don't know if the sport diff is the same. I was under the impression that it was exclusive to the Nismo 6MT model.

I believe it was exclusive to 2015+ Nismo, unless Nissan further apply to sports pkg car during later model years (can't keep track of the little changes anymore).

Even the 7at in 2015+ final drive ratio got a bump. First gear feels noticeably shorter, or quicker off the line, compared to other 7at's I've had.

Hotrodz · 11-13-2020, 11:46 AM

Quote:

Originally Posted by cv129

I believe it was exclusive to 2015+ Nismo, unless Nissan further apply to sports pkg car during later model years (can't keep track of the little changes anymore).

Even the 7at in 2015+ final drive ratio got a bump. First gear feels noticeably shorter, or quicker off the line, compared to other 7at's I've had.

The final drive on the 09-14 is 3.69. I believe the sport is the same.

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Spooler · 11-16-2020, 08:08 AM

I run the Z1 diff cover, OS Giken 1.5 way, Z1 poly diff mounts, and a modified Bellworks diff brace. My Subframe is solid mounted with Nismo/SPL subframe bushings. It's not bad or hard to deal with. No whining in the cabin. I hate that. That is why I have the poly mounts. I also run a diff cooler and that is a must have with a clutch diff. It is loud at a stop, driving you don't notice it so much. The Z1 cover you trim the bottom fins to clear.

NissanZ34 · 11-16-2020, 12:19 PM

Quote:

Originally Posted by Spooler

I run the Z1 diff cover, OS Giken 1.5 way, Z1 poly diff mounts, and a modified Bellworks diff brace. My Subframe is solid mounted with Nismo/SPL subframe bushings. It's not bad or hard to deal with. No whining in the cabin. I hate that. That is why I have the poly mounts. I also run a diff cooler and that is a must have with a clutch diff. It is loud at a stop, driving you don't notice it so much. The Z1 cover you trim the bottom fins to clear.

I have searched for the Nismo and the SPL subframe bushings. It appears that the Nismo kit includes shims for adjustment. The price is significantly higher than Z1 or SPL but since it can be ordered at the dealership I could then avoid paying for the shipping.

Do you have the solid or polyurethane transmission mounts and what are your motor mounts? What diff cooler would you recommend?

Spooler · 11-16-2020, 01:02 PM

Quote:

Originally Posted by NissanZ34

I have searched for the Nismo and the SPL subframe bushings. It appears that the Nismo kit includes shims for adjustment. The price is significantly higher than Z1 or SPL but since it can be ordered at the dealership I could then avoid paying for the shipping.

Do you have the solid or polyurethane transmission mounts and what are your motor mounts? What diff cooler would you recommend?

I run a stock transmission mount. Too damn noisy otherwise. I have CJ Motorsports motor mounts. They are noisy and have some vibrations. Once you are moving, you don't notice it. IF I had to do it again I might would go with the Z1 poly motor mounts.

-ZS-Carpenter · 11-16-2020, 03:41 PM

Quote:

Originally Posted by Spooler

I run a stock transmission mount. Too damn noisy otherwise. I have CJ Motorsports motor mounts. They are noisy and have some vibrations. Once you are moving, you don't notice it. IF I had to do it again I might would go with the Z1 poly motor mounts.

No extra noise with the Torque Solutions trans mount

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Spooler · 11-16-2020, 04:08 PM

Quote:

Originally Posted by -ZS-Carpenter

No extra noise with the Torque Solutions trans mount

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I will stay stock. I don't need to crack a block between the head studs and main studs.

Rusty · 11-16-2020, 05:49 PM

Quote:

Originally Posted by NissanZ34

I have searched for the Nismo and the SPL subframe bushings. It appears that the Nismo kit includes shims for adjustment. The price is significantly higher than Z1 or SPL but since it can be ordered at the dealership I could then avoid paying for the shipping.

Do you have the solid or polyurethane transmission mounts and what are your motor mounts? What diff cooler would you recommend?

The SPL and Nismo parts are one and the same. SPL makes the parts for Nismo. Then Nismo marks them up. The only difference between them is color and the Nismo items have Nismo on them.

NissanZ34 · 11-21-2020, 10:56 AM

Since one axle is to be changed in order to fit the Wavetrac diff I was wondering if upgrading the axles to the 1200hp Pro-Level axles worth the money? Do guys with 750hp turbo setups run the OEM axles?

Spooler · 11-21-2020, 12:35 PM

The stub axle is changed that goes into the diff. Not the axle. Yes, I do have upgraded axles. It depends on what you are going to do with the car if you need the DSS axles. At 800whp or higher is when they are needed or if it is going to be a 1/4 mile car.

NissanZ34 · 11-27-2020, 09:37 PM

Does the OEM timing belt fit the lightweight Stillen standard crank pulley or I should buy a gates aftermarket?

11-16-2020, 08:08 AM	#3 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,153 Drives: 2013 Nismo 370z Rep Power: 2684394	I run the Z1 diff cover, OS Giken 1.5 way, Z1 poly diff mounts, and a modified Bellworks diff brace. My Subframe is solid mounted with Nismo/SPL subframe bushings. It's not bad or hard to deal with. No whining in the cabin. I hate that. That is why I have the poly mounts. I also run a diff cooler and that is a must have with a clutch diff. It is loud at a stop, driving you don't notice it so much. The Z1 cover you trim the bottom fins to clear. Last edited by Spooler; 11-16-2020 at 08:10 AM.

11-21-2020, 10:56 AM	#9 (permalink)
NissanZ34 Base Member Join Date: Jun 2019 Location: Canada Posts: 92 Drives: 2010 370z 6MT Rep Power: 7	Wavetrac Diff Since one axle is to be changed in order to fit the Wavetrac diff I was wondering if upgrading the axles to the 1200hp Pro-Level axles worth the money? Do guys with 750hp turbo setups run the OEM axles?

11-21-2020, 12:35 PM	#10 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,153 Drives: 2013 Nismo 370z Rep Power: 2684394	The stub axle is changed that goes into the diff. Not the axle. Yes, I do have upgraded axles. It depends on what you are going to do with the car if you need the DSS axles. At 800whp or higher is when they are needed or if it is going to be a 1/4 mile car. JARblue and Hotrodz like this.

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11-27-2020, 09:37 PM	#11 (permalink)
NissanZ34 Base Member Join Date: Jun 2019 Location: Canada Posts: 92 Drives: 2010 370z 6MT Rep Power: 7	Does the OEM timing belt fit the lightweight Stillen standard crank pulley or I should buy a gates aftermarket?