The Definitive Differential Thread

370Z JT · 01-27-2015, 01:48 AM

Quote:

Originally Posted by Masterbeatty

Don't forget the bearing, differential side (diff bearings)
Nissan P# 38440 x 2
$45.70 each at courtesy nissan

And bolt, drive gear (Ring gear bolts)
P# 38102 x10
$2.79 each

These are both essential when changing the LSD and for a final gear swap just the bolts are essential.

So are the bolt,drive gear required?..I don't see it on post #1. I don't see it on Z1 site either.

chops · 02-11-2015, 04:53 PM

an FYI for people who are confused by axle stubs and what not.. if you are upgrading from a VLSD to an OSG/Wavetrac/Cusco etc you'll need an additional driver side stub (part #38220-JK01B or 38220-1NC1B) or you need to machine your passenger side stub to remove the tapered part

heres some pics that helped me figure things out pulled from nasaforums.com

a. driver/pass stub with a tapered end from an open diff or passenger stub on a VLSD (part #38220-JK01A)

b. driver side stub on a VLSD (you will need to buy one of these if you're going from an open diff to VLSD (part #38220-JK01B or 38220-1NC1B)

c. inside of the diff where the stub's lock into place

Megan370z · 02-11-2015, 05:43 PM

Quote:

Originally Posted by chops

an FYI for people who are confused by axle stubs and what not.. if you are upgrading from a VLSD to an OSG/Wavetrac/Cusco etc you'll need an additional driver side stub (part #38220-JK01B or 38220-1NC1B) or you need to machine your passenger side stub to remove the tapered part

I didn't had any issue when I installed the Cusco LSD into the VLSD diff.

chops · 02-11-2015, 11:33 PM

Quote:

Originally Posted by Megan370z

I didn't had any issue when I installed the Cusco LSD into the VLSD diff.

ok, not cusco then

, i was just naming off LSD's that supposedly drop into the base diff

Orestp · 04-09-2015, 07:25 PM

Quote:

Originally Posted by Megan370z

I didn't had any issue when I installed the Cusco LSD into the VLSD diff.

You have an automatic transmission - correct?

Driftomodachi · 04-10-2015, 07:51 PM

I have a base touring with an open diff. What stub axles do I need?

chops · 04-18-2015, 07:14 PM

Quote:

Originally Posted by Driftomodachi

I have a base touring with an open diff. What stub axles do I need?

depends on the diff you're going to upgrade to. my picture guide above literally tells you what you'd need!

read it carefully. its a bit confusing, but i explained it pretty well

Imperial · 05-02-2015, 01:14 AM

the Z1 differential bearing and seal kit includes a "Pinion Crush Sleeve." Is this part necessary?

BGTV8 · 05-02-2015, 04:56 PM

Quote:

Originally Posted by Imperial

the Z1 differential bearing and seal kit includes a "Pinion Crush Sleeve." Is this part necessary?

Yes

Imperial · 05-04-2015, 02:28 AM

What is its part number?

Sent from my iPhone using Tapatalk

SurfDog · 05-04-2015, 04:30 AM

The guys at Z1 sent all I needed EXCEPT Spacers. When you install you'll need a variety of spacers to try in order to get your lash just right. I used trial and error. your stock spacers MIGHT work if you are lucky, but you probably need to try in a few different sizes. This is the main reason this is not really a DIY mod. Have an experienced shop do it (like ship your pumpkin to Z1 perhaps)

Heres a link to my diff building page to better explain the install. (I used a Quaife)

Surfdog's 09 journal

good luck

hjo1078 · 11-15-2015, 04:05 PM

id like to recommend the wavetrac lsd for those looking for good performance with everyday driveability. I had a Kaaz lsd prior to the wavetrac. No more clunks at slow speeds! Difference is night and day, it operates so quietly and still will put that power down. The maintenance on them is basically install and forget. Fluid changes after 20k plus. For those with the vlsd, all you need to get is an extra axle flange. Makes my car so much more enjoyable. I think the kaaz lsd is just too agressive for street driving, the pops and clunks at slow speeds made my car sound like it was broken. And not to mention the constant fluid changes with every oil change. With that said though, the kaaz i think put that power down a little better than the wavetrac. But i'll sacrifice a little performance for driveability.
Wavetrac® Differential - A torque biasing differential with a difference for more info

And i got a great deal from vividracing on this.

Hotrodz · 11-15-2015, 09:08 PM

This will be my next performance upgrade...thanks for sharing!

hjo1078 · 11-15-2015, 10:35 PM

Hotrodz i have seriously been nothing but smiles since getting this wavetrac. My car drives like an oem car now. It is incredibly smooth. I would let u test drive my car if u werent in the west coast. Lol

Sent from my iPhone using Tapatalk

Hotrodz · 11-15-2015, 10:49 PM

Lol, I would take you up on that for sure!

Sent from my SM-N910P using Tapatalk

02-11-2015, 04:53 PM	#32 (permalink)
chops A True Z Fanatic Join Date: Oct 2010 Location: NA Posts: 1,732 Drives: NA Rep Power: 21	an FYI for people who are confused by axle stubs and what not.. if you are upgrading from a VLSD to an OSG/Wavetrac/Cusco etc you'll need an additional driver side stub (part #38220-JK01B or 38220-1NC1B) or you need to machine your passenger side stub to remove the tapered part heres some pics that helped me figure things out pulled from nasaforums.com a. driver/pass stub with a tapered end from an open diff or passenger stub on a VLSD (part #38220-JK01A) b. driver side stub on a VLSD (you will need to buy one of these if you're going from an open diff to VLSD (part #38220-JK01B or 38220-1NC1B) c. inside of the diff where the stub's lock into place 2011 Nismo#91, JARblue and Rusty like this. Last edited by chops; 02-17-2015 at 10:52 PM.

04-10-2015, 07:51 PM	#36 (permalink)
Driftomodachi Enthusiast Member Join Date: Mar 2013 Location: Cerritos, CA Posts: 482 Drives: 2010 40th Rep Power: 13	I have a base touring with an open diff. What stub axles do I need? Dentt42 likes this. __________________ 2010 40th Anniversary ll GT-R start button ll GT-R map lenses ll Plastidipped fangs and rear valence ll OEM foglight & switch ll Motordyne E370 Cat back ll Motordyne ART Pipes ll Takeda aFe Attack CAI ll Sprint Booster ll Z1 34 row Setrab oil cooler ll Z1 Motorsports M-Spec Shift Knob

05-04-2015, 04:30 AM	#41 (permalink)
SurfDog A True Z Fanatic Join Date: May 2012 Location: Colorado (9000 feet) Age: 56 Posts: 1,793 Drives: 09 6mt, 13 Sequoia, Rep Power: 15748	The guys at Z1 sent all I needed EXCEPT Spacers. When you install you'll need a variety of spacers to try in order to get your lash just right. I used trial and error. your stock spacers MIGHT work if you are lucky, but you probably need to try in a few different sizes. This is the main reason this is not really a DIY mod. Have an experienced shop do it (like ship your pumpkin to Z1 perhaps) Heres a link to my diff building page to better explain the install. (I used a Quaife) Surfdog's 09 journal good luck GaleForce likes this. __________________ 09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix

11-15-2015, 04:05 PM	#42 (permalink)
hjo1078 Track Member Join Date: May 2011 Location: virginia Age: 45 Posts: 572 Drives: twin turbo 370z Rep Power: 5394	id like to recommend the wavetrac lsd for those looking for good performance with everyday driveability. I had a Kaaz lsd prior to the wavetrac. No more clunks at slow speeds! Difference is night and day, it operates so quietly and still will put that power down. The maintenance on them is basically install and forget. Fluid changes after 20k plus. For those with the vlsd, all you need to get is an extra axle flange. Makes my car so much more enjoyable. I think the kaaz lsd is just too agressive for street driving, the pops and clunks at slow speeds made my car sound like it was broken. And not to mention the constant fluid changes with every oil change. With that said though, the kaaz i think put that power down a little better than the wavetrac. But i'll sacrifice a little performance for driveability. Wavetrac® Differential - A torque biasing differential with a difference for more info And i got a great deal from vividracing on this. Hotrodz and jchammond like this.

11-15-2015, 09:08 PM	#43 (permalink)
Hotrodz Premium Member Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684384	This will be my next performance upgrade...thanks for sharing! hjo1078 and jchammond like this. __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

05-02-2015, 01:14 AM	#38 (permalink)
Imperial Enthusiast Member Join Date: Aug 2010 Location: Long Beach, CA Posts: 486 Drives: 10 Nismo 370Z PW M6 Rep Power: 14	the Z1 differential bearing and seal kit includes a "Pinion Crush Sleeve." Is this part necessary?

05-04-2015, 02:28 AM	#40 (permalink)
Imperial Enthusiast Member Join Date: Aug 2010 Location: Long Beach, CA Posts: 486 Drives: 10 Nismo 370Z PW M6 Rep Power: 14	What is its part number? Sent from my iPhone using Tapatalk

11-15-2015, 10:35 PM	#44 (permalink)
hjo1078 Track Member Join Date: May 2011 Location: virginia Age: 45 Posts: 572 Drives: twin turbo 370z Rep Power: 5394	Hotrodz i have seriously been nothing but smiles since getting this wavetrac. My car drives like an oem car now. It is incredibly smooth. I would let u test drive my car if u werent in the west coast. Lol Sent from my iPhone using Tapatalk Hotrodz likes this.

11-15-2015, 10:49 PM	#45 (permalink)
Hotrodz Premium Member Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684384	Lol, I would take you up on that for sure! Sent from my SM-N910P using Tapatalk hjo1078 likes this. __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

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