The Definitive Differential Thread

osbornsm · 04-24-2014, 10:48 AM

Parts Required for a Diff Upgrade

1x - Limited-Slip Differential (choose type from details below)
2x - 1L Diff Oil - (Motul 75/90)
2x - 38440-0C000 - Differential Side Bearing
2x - 38342-P9010 - Differential Side Oil Seal
2x - 11026-4N200 - Differential Drain Plug Crush Washer
1x - 38120-0C000 - Carrier Bearing Assembly
1x - 38140-0C00A - Pinion Bearing
1x - 38189-P0117 - Drive Oil Seal

Differential Types

Viscous Type
- OEM
Torsen Type (Gear Driven)
- Quaife $1,100
  - Different part # necessary if Factory VLSD is installed
  - Lifetime Warranty?
  - no harsh engagement
  - no special oil
  - no break in period
Clutch Type
- Cusco Type RS - $1,440
- Kaaz Super Q - $1,250 <-- 1.5 or 2 way
- OS Giken - $1,600 <-- Low maint / Smooth, Customizable by Manufacturer
- Nismo GT Pro - $2,800 *cough

Differential Adjustability (Clutch-Type LSD are adjustable)

60% lock: DD and track fun on street tires.
80% lock: Street and track on wide high grip street tires or R comps.
100% lock: Drifting or a track only car on slicks.

Related Parts (to change while the diff is open)

Whiteline Diff Bushings - $110 <-- Better / quieter for DD
SPL Solid Bushings $160
Finned Diff Cover $140
Upgraded Diff fluid
4.08 Gears - $550
Z1 Motorsports Differential Upgrade Kit $275
- Whiteline Front/Rear Diff Bushings - $100
- Finned Diff Cover - $140
- 2 Liters Diff Fluid
- 1 Tube Silicone

Related Info

Megan370z · 04-24-2014, 11:56 AM

just a headup, the Cusco LSD can be found way cheaper than this somewhere else. (other forum)
I got 1300$ shipped to Canada..

and you mentioned some adjustability beside the other but not the Cusco...
It can be set 1.5 to 2.0 by the user & manufacturer (different part # ) and also has similar adjustability of the Os siken with the same low maintenance. and the factory is friendly enough to help with other parts to fine tune the LSD .. not like the other higher priced one.

Masterbeatty · 04-24-2014, 01:16 PM

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.

dP3NGU1N · 04-24-2014, 01:30 PM

Also want to include changing the shaft assembly if you are swapping from a vlsd. Some diff kits include it. Some don't. Os giken does not include one.

black_sedan · 04-25-2014, 05:38 AM

Can we get a part list of what is needed to swap a base diff for the VLSD? I am getting ready to swap just the diff and know I need the axle stub from the Sport Package, but do the bearings need to be replaced? shims?

Wonka2581 · 04-25-2014, 06:30 AM

Sub'd...

osbornsm · 04-25-2014, 08:28 AM

Quote:

Originally Posted by black_sedan

Can we get a part list of what is needed to swap a base diff for the VLSD? I am getting ready to swap just the diff and know I need the axle stub from the Sport Package, but do the bearings need to be replaced? shims?

Z1 Motorsports can tell you what you need when you BUY one from them, or you can e-mail?

Driftomodachi · 04-25-2014, 10:16 AM

Subbed. OS Giken has the most clutch plates too

osbornsm · 05-02-2014, 01:29 PM

Updated with parts required for installation.

Masterbeatty · 05-13-2014, 11:26 PM

I highly Recommend getting upgraded diff bushings as I blew my stock one after 3 autox days and only a month after I installed my quaife LSD.

Plasmite · 05-14-2014, 10:18 AM

Subbed and repped. Nice thread

osbornsm · 05-23-2014, 12:42 PM

Quote:

Originally Posted by Plasmite

Subbed and repped. Nice thread

AlexRaymond19 · 06-30-2014, 12:09 PM

Never mind, I am blind today. Nice thread!

octet · 11-01-2014, 05:47 AM

Hi guys, nice informative thread!

I recently built my 7AT gearbox at Level 10 rated up to 1000bhp and the engine is on the way to Kyle @ IPP for a stage 2 build rated up to 850rwhp. I will also transplant the GReddy TT kit and supporting mods (injectors, fuel rails, fuel pump, oil coolers, oil pan etc) form current engine to the built one.

Now to be able to put all that power done nicely, perhaps I should do something about the diff, shouldn't I?

What do you guys recommend changing?

Thanks a lot!

DEpointfive0 · 11-01-2014, 06:12 AM

Quote:

Originally Posted by octet

Hi guys, nice informative thread!

I recently built my 7AT gearbox at Level 10 rated up to 1000bhp and the engine is on the way to Kyle @ IPP for a stage 2 build rated up to 850rwhp. I will also transplant the GReddy TT kit and supporting mods (injectors, fuel rails, fuel pump, oil coolers, oil pan etc) form current engine to the built one.

Now to be able to put all that power done nicely, perhaps I should do something about the diff, shouldn't I?

What do you guys recommend changing?

Thanks a lot!

You definitely want a diff, if you drive a lot, get a quaiffe. If you don't mind race car, get another diff. You MIGHT want to hear down your car too so that it'll be easier to actually USE the power you're making...

04-24-2014, 10:48 AM	#1 (permalink)
osbornsm A True Z Fanatic Join Date: Jun 2011 Location: WHAT Posts: 2,551 Drives: 2018 Camaro SS 1LE Rep Power: 424	The Definitive Differential Thread Parts Required for a Diff Upgrade 1x - Limited-Slip Differential (choose type from details below) 2x - 1L Diff Oil - (Motul 75/90) 2x - 38440-0C000 - Differential Side Bearing 2x - 38342-P9010 - Differential Side Oil Seal 2x - 11026-4N200 - Differential Drain Plug Crush Washer 1x - 38120-0C000 - Carrier Bearing Assembly 1x - 38140-0C00A - Pinion Bearing 1x - 38189-P0117 - Drive Oil Seal Differential Types Viscous Type OEM Torsen Type (Gear Driven) Quaife $1,100 Different part # necessary if Factory VLSD is installed Lifetime Warranty? no harsh engagement no special oil no break in period Clutch Type Cusco Type RS - $1,440 Kaaz Super Q - $1,250 <-- 1.5 or 2 way OS Giken - $1,600 <-- Low maint / Smooth, Customizable by Manufacturer Nismo GT Pro - $2,800 cough Differential Adjustability (Clutch-Type LSD are adjustable) 60% lock: DD and track fun on street tires. 80% lock: Street and track on wide high grip street tires or R comps. 100% lock: Drifting or a track only car on slicks. Related Parts (to change while the diff is open) Whiteline Diff Bushings - $110* <-- Better / quieter for DD SPL Solid Bushings $160 Finned Diff Cover $140 Upgraded Diff fluid 4.08 Gears - $550 Z1 Motorsports Differential Upgrade Kit $275 Whiteline Front/Rear Diff Bushings - $100 Finned Diff Cover - $140 2 Liters Diff Fluid 1 Tube Silicone Related Info DIY: Rear Differential Oil Change Track Day Best practices N8GTOL, JARblue, zpower86 and 12 others like this. __________________ 2018 Camaro SS 1LE (455hp) - 2011 Nissan 370z (333hp) - 2004 VW R32 (240hp) - 2000 Civic Si (160hp) Last edited by osbornsm; 05-02-2014 at 01:29 PM.

04-24-2014, 11:56 AM	#2 (permalink)
Megan370z A True Z Fanatic Join Date: Oct 2009 Location: Canada Posts: 1,156 Drives: 370z Rep Power: 24	just a headup, the Cusco LSD can be found way cheaper than this somewhere else. (other forum) I got 1300$ shipped to Canada.. and you mentioned some adjustability beside the other but not the Cusco... It can be set 1.5 to 2.0 by the user & manufacturer (different part # ) and also has similar adjustability of the Os siken with the same low maintenance. and the factory is friendly enough to help with other parts to fine tune the LSD .. not like the other higher priced one. Luciano13 likes this. __________________ Megan Journal Click Me ....................One Man Team Motorsport Click Me Last edited by Megan370z; 04-24-2014 at 12:00 PM.

04-24-2014, 01:16 PM	#3 (permalink)
Masterbeatty A True Z Fanatic Join Date: May 2012 Location: Whales Vagina Posts: 4,586 Drives: the speed limit... Rep Power: 122867	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. osbornsm and DEpointfive0 like this. __________________ 2011 MB 6MT Masterbeatty journal Last edited by Masterbeatty; 04-25-2014 at 10:05 AM. Reason: People can't read.

04-24-2014, 01:30 PM	#4 (permalink)
dP3NGU1N A True Z Fanatic Join Date: Feb 2011 Location: Irvine Posts: 1,682 Drives: 13 PW sport 6mt Rep Power: 18	Also want to include changing the shaft assembly if you are swapping from a vlsd. Some diff kits include it. Some don't. Os giken does not include one. __________________ 35% Hooper Optik \| Takeda Attack CAI \| F.I. HFC \| Hotchkis Sway Bar \| Stillen 24row \| OS Giken Super Lock LSD \| TK Shift Knob \| EVO-R Carbon Diffuser

04-25-2014, 06:30 AM	#6 (permalink)
Wonka2581 A True Z Fanatic Join Date: Nov 2012 Location: Chattanooga, TN Posts: 3,083 Drives: MY WIFE CRAZY.... Rep Power: 2612	Sub'd... __________________ "I have nothing to offer but blood, toil, tears and sweat""Winston Churchill"

04-25-2014, 05:38 AM	#5 (permalink)
black_sedan Enthusiast Member Join Date: Dec 2011 Location: Florida Posts: 308 Drives: 14' F150, 14' Q50 Rep Power: 13	Can we get a part list of what is needed to swap a base diff for the VLSD? I am getting ready to swap just the diff and know I need the axle stub from the Sport Package, but do the bearings need to be replaced? shims?

04-25-2014, 10:16 AM	#8 (permalink)
Driftomodachi Enthusiast Member Join Date: Mar 2013 Location: Cerritos, CA Posts: 482 Drives: 2010 40th Rep Power: 13	Subbed. OS Giken has the most clutch plates too __________________ 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

05-02-2014, 01:29 PM	#9 (permalink)
osbornsm A True Z Fanatic Join Date: Jun 2011 Location: WHAT Posts: 2,551 Drives: 2018 Camaro SS 1LE Rep Power: 424	Updated with parts required for installation. Masterbeatty likes this. __________________ 2018 Camaro SS 1LE (455hp) - 2011 Nissan 370z (333hp) - 2004 VW R32 (240hp) - 2000 Civic Si (160hp)

05-13-2014, 11:26 PM	#10 (permalink)
Masterbeatty A True Z Fanatic Join Date: May 2012 Location: Whales Vagina Posts: 4,586 Drives: the speed limit... Rep Power: 122867	I highly Recommend getting upgraded diff bushings as I blew my stock one after 3 autox days and only a month after I installed my quaife LSD. __________________ 2011 MB 6MT Masterbeatty journal

05-14-2014, 10:18 AM	#11 (permalink)
Plasmite Enthusiast Member Join Date: Aug 2012 Location: Canada Posts: 259 Drives: '12 M6 Panty Peeler Rep Power: 13	Subbed and repped. Nice thread __________________ WISHLIST

06-30-2014, 12:09 PM	#13 (permalink)
AlexRaymond19 Track Member Join Date: Jun 2011 Location: Maine Posts: 771 Drives: 2010 Nissan 370z Rep Power: 15	Never mind, I am blind today. Nice thread! osbornsm likes this. __________________ 2010 370Z Touring MT \| Stillen \| Motordyne \| Momentum\| Z1 \| Fast Intentions \| Advant Garde \| RE11 \| Swift \| SPC \| Quaife \| Whiteline \| Evo R \| 322RWHP 259ft-lb Mustang

11-01-2014, 05:47 AM	#14 (permalink)
octet Enthusiast Member Join Date: Jul 2013 Location: London, UK Posts: 305 Drives: 2017 Nismo 370z 6MT Rep Power: 3367	Hi guys, nice informative thread! I recently built my 7AT gearbox at Level 10 rated up to 1000bhp and the engine is on the way to Kyle @ IPP for a stage 2 build rated up to 850rwhp. I will also transplant the GReddy TT kit and supporting mods (injectors, fuel rails, fuel pump, oil coolers, oil pan etc) form current engine to the built one. Now to be able to put all that power done nicely, perhaps I should do something about the diff, shouldn't I? What do you guys recommend changing? Thanks a lot! DEpointfive0 likes this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Official Aftermarket Differential Thread	G37sHKS	Engine & Drivetrain	55	12-12-2019 08:48 AM
Lug Nuts - The definitive guide	osbornsm	Wheels & Tires	175	12-22-2018 01:55 PM
EcoJet: Definitive Edition - Jay Leno's Garage	Nismo89	Other Vehicles	0	10-31-2012 11:32 PM
Help! Need the differential bearing size/measure for an aftermaket differential	tkramwinkel	Engine & Drivetrain	1	10-02-2012 05:49 AM
The Definitive Z34 Brake Resource	SE	Brakes & Suspension	68	05-11-2012 03:19 PM